JP6514442B2 - Preparation method of spray mortar specimen, formwork for spray mortar specimen, and spray mortar specimen - Google Patents
Preparation method of spray mortar specimen, formwork for spray mortar specimen, and spray mortar specimen Download PDFInfo
- Publication number
- JP6514442B2 JP6514442B2 JP2014090374A JP2014090374A JP6514442B2 JP 6514442 B2 JP6514442 B2 JP 6514442B2 JP 2014090374 A JP2014090374 A JP 2014090374A JP 2014090374 A JP2014090374 A JP 2014090374A JP 6514442 B2 JP6514442 B2 JP 6514442B2
- Authority
- JP
- Japan
- Prior art keywords
- mortar
- internal space
- space
- mold
- specimen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Description
本発明は、吹付けモルタル供試体の作製方法、該作製方法に用いる吹付けモルタル供試体用の型枠及び前記モルタル供試体の作製方法で作製された吹付けモルタル供試体に関する。 The present invention relates to a method for producing a spray mortar sample, a form for a spray mortar sample used in the production method, and a spray mortar sample produced by the method for producing the mortar sample.
近年、コンクリート構造物等の補修、補強のために吹付けによるモルタルの施工が行われている。かかる吹付けモルタル施工方法としては、セメント、骨材等の粉体材料と、水、液体混和剤等の液体材料とを、別々に調製して、施工現場付近までホース等で移送して、吹付け用ノズル内で両者を混合し、該混合物を圧縮空気等によって施工箇所に吹付けることでモルタルを施工するいわゆる乾式吹付けモルタル施工方法等が挙げられる。 In recent years, construction of mortar by blowing has been carried out to repair and reinforce concrete structures and the like. As this spraying mortar construction method, powder materials such as cement and aggregate and liquid materials such as water and liquid admixture are separately prepared, transferred to the vicinity of the construction site with a hose or the like, and blown. The so-called dry spray mortar construction method etc. which construct a mortar by mixing both in a mounting nozzle and blowing this mixture by compressed air etc. on a construction location are mentioned.
かかる吹付けモルタル施工方法によって得られたモルタルについて、設計どおりの強度や性状が得られているかどうかを判断するためには、施工方法と同様の方法で吹付けられた供試体を用いてモルタルの圧縮強度、性状等が設計基準を満たしているかどうかを試験する必要がある。
かかる吹付けモルタル供試体の作製方法としては、例えば、モルタルを吹付けた後に、所望のサイズのモルタル片を抜き取る、いわゆるコア抜きを行い、かかるモルタル片を供試体として作製する方法がある。しかし、かかる方法では、コア抜きが煩雑な作業であり、また、あらかじめ供試体のサイズよりも大きいサイズのモルタルを施工する必要があり、材料がムダになる。さらに、供試体が大きくなるため複数人による運搬が必要となる等施工現場での取扱いが煩雑となる。
In order to determine whether or not the strength and properties as designed are obtained for the mortar obtained by the spray mortar construction method, it is necessary to use a specimen sprayed by the same method as the construction method. It is necessary to test whether the compressive strength, properties, etc. meet the design criteria.
As a method for producing such a spray mortar sample, there is, for example, a method in which so-called core removal is performed by extracting a mortar piece of a desired size after spraying a mortar, and such mortar piece is produced as a specimen. However, in such a method, coring is a complicated operation, and a mortar having a size larger than the size of the specimen needs to be applied in advance, and the material becomes waste. Furthermore, because the specimen becomes large, the transportation by a plurality of people is required, and the handling at the construction site becomes complicated.
そこで、型枠を用いて該型枠の内部空間にモルタルを吹付けて供試体を作製することが考えられる。しかし、型枠内にモルタルを吹付けて供試体を作製する場合、広い面積にモルタルを吹付ける実際の施工と違い、小型の型枠の内部空間に隙間なくモルタルを充填することが困難である。型枠内に隙間なくモルタルが充填できない場合には供試体を設計どおりの密度に形成することができず、供試体間での密度の変動が大きくなるため正確な試験結果が得られない。型枠を大型にすれば内部空間を大きくでき、隙間なくモルタルを充填することができるが、供試体も大きくなり、その結果前述のように運搬などの取り扱いが煩雑になる。 Then, it is possible to spray a mortar to the internal space of this formwork using a formwork, and to produce a specimen. However, it is difficult to fill the mortar without gaps in the inner space of a small mold, unlike the actual construction where the mortar is sprayed into a mold to prepare a specimen, and the mortar is sprayed over a large area. . If the mortar can not be filled without gaps in the mold, the specimen can not be formed to the designed density, and the variation of the density between the specimens becomes large, so that accurate test results can not be obtained. If the formwork is made large, the internal space can be made large, and the mortar can be filled without gaps, but the specimen also becomes large, and as a result, handling such as transportation becomes complicated as described above.
従来、型枠内の隅々にまでモルタルを充填するために、板体の上にモルタルを吹付けておき、かかる吹付けられたモルタルが硬化する前に板体から掻き落として型枠内に充填する事や、型枠内に吹付けたモルタルを突き棒等で締め固める事などが行われていた。しかし、かかる作業は煩雑であり、且つ、実際の吹付けモルタルとは施工方法が相違するため、試験結果も正確ではない。そこで、例えば、特許文献１には、金網等のように孔を有する型枠を用いてモルタル供試体を作製することが記載されている。特許文献１には、かかる孔を有する型枠を用いることで、型枠の内部にモルタルを吹付けると、圧縮空気が孔を通過する際にモルタルを締め固めることができ、型枠内へのモルタルの充填性が向上することが記載されている。 Conventionally, mortar is sprayed onto the plate to fill the mortar all the way in the mold, and the sprayed mortar is scraped off the plate before it hardens into the mold Filling and compacting the mortar sprayed into the form with a stick or the like were performed. However, such an operation is complicated, and the test method is not accurate because the construction method is different from the actual spray mortar. Therefore, for example, Patent Document 1 describes that a mortar specimen is manufactured using a mold having holes such as a wire mesh. In Patent Document 1, by using a mold having such a hole, when mortar is blown to the inside of the mold, the mortar can be compacted when compressed air passes through the hole, and it is possible to insert the mold into the mold. It is described that the filling property of mortar is improved.
しかしながら、特許文献１の型枠を用いた方法では、型枠の隅等にまで十分にモルタルを充填することは困難である。 However, in the method using the mold of Patent Document 1, it is difficult to sufficiently fill the mortar up to the corners and the like of the mold.
そこで、本発明は、上記のような従来技術の問題点に鑑みて、取り扱いが容易なサイズであり且つ設計どおりの密度の吹付けモルタル供試体を得ることができる吹付けモルタル供試体の作製方法、吹付けモルタル供試体用の型枠及び前記作製方法で得られる吹付けモルタル供試体を提供することを課題とする。 Therefore, in view of the problems of the prior art as described above, the present invention is a method of preparing a spray mortar sample which can obtain a spray mortar sample having an easy-to-handle size and a density as designed. An object of the present invention is to provide a mold for a spray mortar specimen and a spray mortar specimen obtained by the above-mentioned preparation method.
本発明にかかる吹付けモルタル供試体の作製方法は、
底面部材と側面部材とに囲まれた四角柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有する型枠を用いて、前記開口から前記底面部材に向かってモルタルを吹付けることで前記内部空間にモルタルを充填して、モルタル供試体を作製する吹付けモルタル供試体の作製方法であって、
前記内部空間の底面の最も短い辺の長さ（Ｓ）の前記内部空間の高さ（Ｈ）に対する比率Ｓ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と前記比率Ｓ／Ｈの値との積が６０以上であり、前記内部空間の体積が１３０００ｃｍ３未満である。
The method for producing a spray mortar sample according to the present invention is
Using a formwork having a quadrangular prism-shaped internal space surrounded by a bottom surface member and a side surface member, and an opening communicating the external space with the internal space formed at a position facing the bottom surface member, A method of producing a sprayed mortar specimen, wherein the interior space is filled with mortar by blowing mortar from an opening toward the bottom member, and a mortar specimen is prepared,
The ratio S / H of the shortest side length (S) of the bottom of the internal space to the height (H) of the internal space is 0.5 or more, and the area (cm 2 ) of the bottom of the internal space The product of the ratio S / H is 60 or more, and the volume of the internal space is less than 13000 cm 3 .
本発明にかかる吹付けモルタル供試体の作製方法は、前述のような構成であることにより、吹付けによりモルタルを型枠の内部空間に充填した際に、隅々にまで隙間なくモルタルを充填することができる。よって、実際のモルタルの施工に近い状態でモルタルを充填でき、且つ、設計どおりの密度の吹付けモルタル供試体を簡単に作製することができる。 According to the method for producing a spray mortar sample according to the present invention, due to the above-described configuration, when filling the mortar into the internal space of the mold by spraying, the mortar is filled without gaps to every corner. be able to. Therefore, the mortar can be filled in a state close to the actual mortar construction, and a spray mortar specimen having a density as designed can be easily produced.
本発明において、前記内部空間の底面の面積が４９ｃｍ２以上であってもよい。 In the present invention, the area of the bottom of the inner space may be 49 cm 2 or more.
前記内部空間の底面の面積が４９ｃｍ２以上である場合には、より正確に設計どおりの密度の吹付けモルタル供試体を簡単に作製することができる。 When the area of the bottom of the inner space is 49 cm 2 or more, a spray mortar specimen having a designed density can be easily produced more accurately.
また、別の本発明にかかる吹付けモルタル供試体の作製方法は、
底面部材と側面部材とに囲まれた円柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有する型枠を用いて、前記開口から前記底面部材に向かってモルタルを吹付けることで前記内部空間にモルタルを充填して、モルタル供試体を作製する吹付けモルタル供試体の作製方法であって、
前記内部空間の底面の直径（Ｄ）の前記内部空間の高さ（Ｈ）に対する比率Ｄ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と前記比率Ｄ／Ｈの値との積が８０以上であり、前記内部空間の体積が１３０００ｍ３未満である。
Further, another method of preparing a spray mortar specimen according to the present invention is
The opening is formed using a mold having a cylindrical internal space surrounded by a bottom surface member and a side surface member, and an opening communicating the external space with the internal space formed at a position facing the bottom surface member. And filling the mortar into the inner space by spraying the mortar toward the bottom surface member, thereby producing a mortar specimen, the method of preparing a spray mortar specimen,
The ratio D / H of the diameter (D) of the bottom of the internal space to the height (H) of the internal space is 0.5 or more, and the area (cm 2 ) of the bottom of the internal space and the ratio D / H And the volume of the internal space is less than 13000 m 3 .
別の本発明にかかる吹付けモルタル供試体の作製方法において、前記内部空間の底面の面積が５０ｃｍ２以上であってもよい。 In another method of producing a sprayed mortar sample according to the present invention, the area of the bottom of the inner space may be 50 cm 2 or more.
本発明にかかる吹付けモルタル供試体用の型枠は、
底面部材と側面部材とに囲まれた四角柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有し、前記開口から前記底面部材に向かってモルタルを吹付けることで前記内部空間にモルタルを充填して、モルタル供試体を作製する吹付けモルタル供試体用の型枠であって、
前記内部空間の底面の最も短い辺の長さ（Ｓ）の前記内部空間の高さ（Ｈ）に対する比率Ｓ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｓ／Ｈの値との積が６０以上であり、前記内部空間の体積が１３０００ｍ３未満である。
The form for the spray mortar specimen according to the invention is:
It has an inner space of a quadrangular prism shape surrounded by the bottom surface member and the side surface member, and an opening for connecting the inside space and the outside space formed at a position opposite to the bottom surface member, It is a formwork for a spray mortar specimen for filling the mortar into the inner space by spraying the mortar toward the member and producing a mortar specimen,
The ratio S / H of the shortest side length (S) of the bottom of the internal space to the height (H) of the internal space is 0.5 or more, and the area (cm 2 ) of the bottom of the internal space The product of the ratio S / H is 60 or more, and the volume of the internal space is less than 13000 m 3 .
また、別の本発明にかかる吹付けモルタル供試体用の型枠は、
底面部材と側面部材とに囲まれた円柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有し、前記開口から前記底面部材に向かってモルタルを吹付けることで前記内部空間にモルタルを充填して、モルタル供試体を作製する吹付けモルタル供試体用の型枠であって、
前記内部空間の底面の直径（Ｄ）の前記内部空間の高さ（Ｈ）に対する比率Ｄ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｄ/Ｈの値との積が８０以上であり、前記内部空間の体積が１３０００ｍ３未満である。
In addition, a mold for a spray mortar specimen according to another present invention is
A cylindrical internal space surrounded by the bottom surface member and the side surface member, and an opening for communicating the internal space and the external space formed at a position facing the bottom surface member, and from the opening to the bottom surface member It is a formwork for a spray mortar specimen for filling the mortar into the inner space by spraying the mortar toward the surface to produce a mortar specimen,
The ratio D / H of the diameter (D) of the bottom of the internal space to the height (H) of the internal space is 0.5 or more, and the area (cm 2 ) of the bottom of the internal space and the ratio D / The product of the value of H is 80 or more, and the volume of the internal space is less than 13000 m 3 .
本発明にかかる吹付けモルタル供試体は、前記吹付けモルタル供試体の作製方法で作製されてなる。 The spray mortar sample according to the present invention is manufactured by the method of manufacturing the spray mortar sample.
本発明によれば、取り扱いが容易なサイズであり且つ設計どおりの密度の吹付けモルタル供試体を得ることができる吹付けモルタル供試体の作製方法、吹付けモルタル供試体用の型枠及び前記作製方法で得られる吹付けモルタル供試体を提供することができる。 According to the present invention, a method of preparing a spray mortar specimen which can obtain a spray mortar specimen of a size which is easy to handle and has a density as designed, a mold for the spray mortar specimen and the preparation It is possible to provide a sprayed mortar specimen obtained by the method.
以下、本発明の吹付けモルタル供試体の作製方法、吹付けモルタル供試体用の型枠、及び吹付けモルタル供試体の一実施形態について説明する。
まず、本実施形態にかかる吹付けモルタル供試体用の型枠について説明する。
本実施形態の吹付けモルタル供試体用の型枠（以下、単に型枠とも言う。）は、底面部材と側面部材とに囲まれた四角柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有し、前記開口から前記底面部材に向かってモルタルを吹付けることで前記内部空間にモルタルを充填して、モルタル供試体を作製する吹付けモルタル供試体用の型枠であって、前記内部空間の底面の最も短い辺の長さ（Ｓ）の前記内部空間の高さ（Ｈ）に対する比率Ｓ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｓ／Ｈの値との積が６０以上であり、前記内部空間の体積が１３０００ｍ３未満である型枠である。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a method for producing a spray mortar sample, a mold for a spray mortar sample, and a spray mortar sample according to the present invention will be described.
First, a mold for a spray mortar sample according to the present embodiment will be described.
The mold for the spray mortar sample of the present embodiment (hereinafter, also simply referred to as a mold) has a quadrangular prism-shaped internal space surrounded by the bottom member and the side members, and a position facing the bottom member. And the opening for communicating the internal space with the external space, and the mortar is filled from the opening toward the bottom member to fill the mortar with the mortar to produce a mortar sample. Of the shortest side length (S) of the bottom surface of the internal space to the height (H) of the internal space at a ratio S / H of 0.5 or more. In the mold, the product of the area (cm 2 ) of the bottom surface of the internal space and the value of the ratio S / H is 60 or more, and the volume of the internal space is less than 13000 m 3 .
また、本実施形態の吹付けモルタル供試体用の型枠は、底面部材と側面部材とに囲まれた円柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有し、前記開口からモルタルを吹付けることで前記内部空間にモルタルを充填して、モルタル供試体を作製する吹付けモルタル供試体用の型枠であって、前記内部空間の底面の直径（Ｄ）の前記内部空間の高さ（Ｈ）に対する比率Ｄ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｄ／Ｈの値との積が８０以上であり、前記内部空間の体積が１３０００ｍ３未満である。 Further, the mold for the spray mortar sample of the present embodiment has a cylindrical internal space surrounded by the bottom surface member and the side surface member, and the internal space and the outside formed at the position facing the bottom surface member. A mold for a spray mortar specimen, having an opening communicating with a space, and filling the mortar into the inner space by spraying the mortar from the opening to produce a mortar specimen, The ratio D / H of the diameter (D) of the bottom of the inner space to the height (H) of the inner space is 0.5 or more, and the area (cm 2 ) of the bottom of the inner space and the ratio D / H And the volume of the internal space is less than 13000 m 3 .
本実施形態の型枠は、セメント、骨材等の粉体材料と、水、液体混和剤等の液体材料とを、別々に混合して、ホース等で吹付け用ノズルまで別々に移送し、該ノズル内で粉体材料と液体材料とを混合して、圧縮空気の圧力で吹付ける、いわゆる乾式の吹付け方法で作製する吹付けモルタル供試体用の型枠である。 In the formwork of the present embodiment, powder materials such as cement and aggregate and liquid materials such as water and liquid admixture are separately mixed, and are separately transferred to the spray nozzle with a hose or the like. It is a formwork for a spray mortar specimen produced by a so-called dry spraying method in which powder material and liquid material are mixed in the nozzle and sprayed under the pressure of compressed air.
本実施形態の型枠は、底面部材と側面部材とに囲まれた四角柱形状又は円柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有する。 The formwork of the present embodiment communicates the internal space of a quadrangular prism shape or a cylindrical shape surrounded by the bottom surface member and the side surface member, and the internal space and the external space formed at the position facing the bottom surface member. And an opening.
より具体的には、例えば、四角形状の板状体からなる底面部材と、四角形状の４枚の板状体からなる側面部材とから構成され、底面部材の周縁部に各側面部材の一辺が垂直に取り付けられ、底面部材と対向する位置には側面部材の上端縁部に囲まれた開口が形成された型枠であってもよい。この場合には、底面部材と側面部材とに囲まれた四角柱形状の内部空間が形成され、前記開口によって該内部空間と外部空間とが連通されている。 More specifically, for example, it is composed of a bottom plate made of a square plate and a side plate made of four square plates, and one side of each side is at the periphery of the bottom plate. It may be a mold which is vertically mounted and has an opening surrounded by the upper end edge of the side member at a position facing the bottom member. In this case, a quadrangular prism-shaped internal space surrounded by the bottom surface member and the side surface member is formed, and the internal space is communicated with the external space by the opening.
あるいは、四角形状の板状体からなる底面部材と、四角形状の３枚の板状体からなる側面部材とから構成され、底面部材の周縁部のうち三辺に各側面部材の一辺が垂直に取り付けられ、底面部材と対向する位置には三方を側面部材の上端縁部に囲まれ一方が開放された開口が形成され、底面部材の一辺側の側面には、側面部材が存在しない、開放部が形成された型枠であってもよい。
この場合、底面部材と三方の側面部材とに囲まれた四角柱形状の内部空間が形成され、前記開口及び開放部によって該内部空間と外部空間とが連通されている。
Alternatively, it is composed of a bottom plate made of a square plate and a side plate made of three square plates, and one side of each side member is perpendicular to three sides of the periphery of the bottom plate. An opening is formed that is attached and is open at one side of the bottom member surrounded by the upper end edge of the side member at three positions facing the bottom member, and the side member is not present at one side of the bottom member. It may be a mold in which is formed.
In this case, a quadrangular prism-shaped internal space surrounded by the bottom surface member and the three side surface members is formed, and the internal space is communicated with the external space by the opening and the opening.
あるいは、円形状の板状体からなる底面部材と、筒状の側面部材とから構成され、底面部材の周縁部に側面部材の一方の端部が垂直に取り付けられ、底面部材と対向する位置には側面部材の上端縁部に囲まれた開口が形成された型枠であってもよい。この場合には、底面部材と側面部材とに囲まれた円柱形状の内部空間が形成される。 Alternatively, it is composed of a bottom member consisting of a circular plate and a cylindrical side member, and one end of the side member is vertically attached to the peripheral edge of the bottom member and is opposed to the bottom member. May be a mold in which an opening surrounded by the upper end edge of the side member is formed. In this case, a cylindrical internal space surrounded by the bottom surface member and the side surface member is formed.
前記開口は、内部空間の底面と対向する位置において、内部空間の底面と略等しい面積に開口であることが、後述するモルタルの吹付けが容易であるため好ましい。 It is preferable that the opening has an area substantially equal to the bottom surface of the internal space at a position facing the bottom surface of the internal space, because spraying of the mortar described later is easy.
型枠の前記底面部材及び側面部材の材質は、通常モルタル供試体用の型枠に使用される材質であれば特に限定されるものではなく、例えば、金属製、合成樹脂製、木製等が挙げられる。 The material of the bottom and side members of the mold is not particularly limited as long as it is a material generally used for a mold for a mortar sample, and examples thereof include metal, synthetic resin, and wood. Be
前記内部空間の形状及びサイズは、所望の供試体の設計形状及び設計サイズとなるように構成される。 The shape and size of the interior space are configured to be the designed shape and size of the desired specimen.
尚、本実施形態において四角柱形状は、底面の形状が長方形、ひし形等の四角形である柱状体であり、例えば、底面が四角形である場合は、すべての内角の角度が６０°以上１２０°以下、好ましくは８０°以上１００°以下、より好ましくは９０°である略長方形(以下、長方形状ともいう。)である。さらに、本実施形態において四角柱形状は直角柱の形状を指す。 In the present embodiment, the quadrangular prism shape is a columnar body whose bottom surface is a rectangular shape such as a rectangle or a rhombus. Preferably it is 80 degrees or more and 100 degrees or less, More preferably, it is a substantially rectangle (it is also called rectangular shape hereafter) which is 90 degrees. Furthermore, in the present embodiment, the quadrangular prism shape refers to the shape of a right prism.
また、本実施形態において、円柱形状は、底面の形状が円形である柱状体であり、中でも、底面の形状は、楕円率０．８以上１．０以下である略真円形状であることが好ましい。さらに、本実施形態において円柱形状は直円柱の形状を指す。 Further, in the present embodiment, the cylindrical shape is a columnar body whose bottom surface is circular in shape, and among them, the shape of the bottom is substantially a perfect circle having an ellipticity of 0.8 or more and 1.0 or less. preferable. Furthermore, in the present embodiment, the cylindrical shape refers to the shape of a right circular cylinder.
底面形状が長方形状である四角柱状の内部空間である場合には、型枠は内部空間が以下のようなサイズになるように構成される。 In the case of a quadrangular prism-shaped internal space whose bottom surface shape is a rectangular shape, the mold is configured such that the internal space has the following size.
底面形状が長方形状である四角柱状の内部空間である場合には、型枠は内部空間が以下のようなサイズになるように構成される。
内部空間の底面、すなわち、型枠の底部の内寸の辺のうち最も短い辺の長さをＳとすると、内部空間の高さ、すなわち、型枠の内寸高さＨに対する比率Ｓ／Ｈが０．５以上１１０以下、好ましくは０．６以上１１０以下である。尚、内部空間の底面がすべての辺の長さが等しい正方形状である場合には、底面のいずれか一辺の長さをＳとする。
In the case of a quadrangular prism-shaped internal space whose bottom surface shape is a rectangular shape, the mold is configured such that the internal space has the following size.
Assuming that the bottom of the inner space, that is, the shortest side length of the inner side of the bottom of the form is S, the ratio S / H to the height of the inner space, ie, the inner dimension H of the form. Is 0.5 or more and 110 or less, preferably 0.6 or more and 110 or less. In the case where the bottom of the internal space has a square shape in which all sides have the same length, the length of any one side of the bottom is S.
底面形状が真円形状である円柱形状である内部空間である場合には、型枠は内部空間が以下のようなサイズになるように構成される。
内部空間の底面の直径、すなわち、型枠の底部の内寸径をＤとすると、内部空間の高さ、すなわち、型枠の内寸高さＨに対する比率Ｄ／Ｈが０．５以上、好ましくは０．６以上６３以下である。尚、本実施形態において、内部空間の底面の直径とは、底面の径のうち最も短い径をいう。
In the case of an internal space that is a cylindrical shape whose bottom surface shape is a perfect circular shape, the mold is configured such that the internal space has the following size.
Assuming that the diameter of the bottom of the inner space, that is, the inner diameter of the bottom of the mold is D, the height of the inner space, that is, the ratio D / H to the inner height H of the mold is 0.5 or more. Is 0.6 or more and 63 or less. In the present embodiment, the diameter of the bottom surface of the internal space means the shortest diameter of the diameters of the bottom surface.
さらに、本実施形態の型枠の内部空間は、底面形状が長方形状である四角柱状の内部空間である場合には、内部空間の底面の面積（ｃｍ２）と前記比率Ｓ／Ｈ値との積が６０以上、好ましくは７０以上１３４２０００以下、より好ましくは７０以上５００００以下、になるように構成されている。 Furthermore, when the internal space of the formwork of the present embodiment is a quadrangular prism-like internal space whose bottom surface shape is a rectangular shape, the area (cm 2 ) of the bottom surface of the internal space and the ratio S / H value The product is configured to be 60 or more, preferably 70 or more and 1342000 or less, and more preferably 70 or more and 50000 or less.
また、底面形状が真円形状である円柱形状である内部空間である場合には、内部空間の底面の面積（ｃｍ２）と前記比率Ｄ／Ｈの値との積が８０以上、好ましくは７６以上７６０５００以下、さらに好ましくは８９以上７６０５００以下、もっとも好ましくは８９以上５００００以下になるように構成されている。 In the case of an internal space having a cylindrical shape whose bottom surface shape is a perfect circle, the product of the area (cm 2 ) of the bottom surface of the internal space and the value of the ratio D / H is 80 or more, preferably 76 More than 760500 or less, more preferably 89 or more and 760500 or less, and most preferably 89 or more and 50000 or less.
型枠の内部空間のサイズが前記のように構成されている場合には、内部空間にモルタルを吹付けによって充填した場合に、型枠との間に空間を有することなく、隙間なく充填することができる。
すなわち、実際の施工に近い供試体を作製することができ、且つ設計どおりの密度の供試体を得ることができる。
In the case where the size of the internal space of the mold is configured as described above, when the mortar is filled by spraying into the internal space, the filling should be carried out without a space between the mold and without clearance. Can.
That is, it is possible to produce a specimen close to the actual construction, and to obtain a specimen with the density as designed.
本実施形態の型枠は、前記内部空間の底面の面積は４９ｃｍ２以上であることが好ましく、４９ｃｍ２以上１２２００ｃｍ２以下であることがより好ましく、６４ｃｍ２以上１２２００以下であることがさらにより好ましい。
特に、内部空間の底面が長方形状の場合には、底面の面積が４９ｃｍ２以上であることが好ましく、６４ｃｍ２以上１２２００ｃｍ２以下であることがより好ましい。
また、内部空間の底面が円形状の場合には、底面の面積が５０ｃｍ２以上であることが好ましく、７８ｃｍ２以上１２２００ｃｍ２以下であることがより好ましい。
Mold of the present embodiment is preferably the area of the bottom surface of said internal space is 49cm 2 or more, more preferably 49cm 2 or more 12200Cm 2 or less, still more preferably not less 64cm 2 or more 12200 or less .
In particular, the bottom surface of the inner space in the case of rectangular shape, it is preferable that the area of the bottom surface is 49cm 2 or more, and more preferably 64cm 2 or more 12200Cm 2 or less.
Further, the bottom surface of the inner space in the case of circular shape, it is preferable that the area of the bottom surface is 50 cm 2 or more, and more preferably 78cm 2 or more 12200Cm 2 or less.
型枠の内部空間の底面の面積が前記範囲である場合には、モルタルを吹付けて充填した際に型枠の内部空間の隅々にまで隙間なくモルタルを充填することがより容易にできる。 When the area of the bottom of the inner space of the mold is within the above range, it is possible to more easily fill the mortar without gaps to the corners of the inner space of the mold when the mortar is sprayed and filled.
本実施形態の型枠は、前記内部空間の底面が四角形状の場合には、前記内部空間の底面の最も短い辺の長さ（Ｓ）が４ｃｍ以上５５ｃｍ以下であることが好ましく、５ｃｍ以上５５ｃｍ以下であることがより好ましい。
また、前記内部空間の底面の最も短い辺以外の辺の長さは、特に限定されるものではないが、例えば、４ｃｍ以上３０５０ｃｍ以下、好ましくは５ｃｍ以上３０５０ｃｍ以下であることが挙げられる。
In the mold of the present embodiment, when the bottom of the internal space is rectangular, the shortest side length (S) of the bottom of the internal space is preferably 4 cm to 55 cm, and 5 cm to 55 cm. It is more preferable that
Further, the length of the side other than the shortest side of the bottom surface of the internal space is not particularly limited, but may be, for example, 4 cm or more and 3050 cm or less, preferably 5 cm or more and 3050 cm or less.
前記内部空間の底面が円形状の場合には、前記内部空間の底面の直径（Ｄ）が６２ｃｍ以下であることが好ましく、８ｃｍ以上６２ｃｍ以下であることがより好ましい。 When the bottom surface of the internal space is circular, the diameter (D) of the bottom surface of the internal space is preferably 62 cm or less, and more preferably 8 cm or more and 62 cm or less.
本実施形態の内部空間の高さ（Ｈ）は、比率Ｓ／Ｈ又はＤ／Ｈの値が前記範囲になるように適宜調整されうる。
内部空間の底面が長方形状の場合には、内部空間の高さが１ｃｍ以上３６ｃｍ以下であることが好ましく、４ｃｍ以上３０ｃｍ以下であることがより好ましい。
また、内部空間の底面が円形状の場合には、内部空間の高さが１ｃｍ以上４０ｃｍ以下であることが好ましく、４ｃｍ以上３０ｃｍ以下であることがより好ましい。
The height (H) of the internal space in the present embodiment can be appropriately adjusted so that the value of the ratio S / H or D / H falls within the above range.
When the bottom of the internal space is rectangular, the height of the internal space is preferably 1 cm or more and 36 cm or less, and more preferably 4 cm or more and 30 cm or less.
When the bottom of the inner space is circular, the height of the inner space is preferably 1 cm or more and 40 cm or less, and more preferably 4 cm or more and 30 cm or less.
本実施形態の型枠の内部空間の体積は、四角柱形状の内部空間である場合には、１３０００ｃｍ３未満であって、例えば、４９ｃｍ３以上１２２００ｃｍ３以下であることが好ましく、２５０ｃｍ３以上１２２００ｃｍ３以下であることがより好ましい。
また、円柱形状の内部空間である場合には、１３０００ｃｍ３未満であって、例えば、５０ｃｍ３以上１２２００ｃｍ３以下であることが好ましく、２００ｃｍ３以上１２２００ｃｍ３以下であることがより好ましい。
The volume of the internal space of the mold of the present embodiment, when the internal space of the quadrangular prism shape is less than 13000Cm 3, for example, 49cm 3 or more preferably 12200cm 3 or less, 250 cm 3 or more 12200cm More preferably, it is 3 or less.
Further, when the internal space of the cylindrical shape, be less than 13000Cm 3, for example, preferably at 50 cm 3 or more 12200Cm 3 or less, more preferably 200 cm 3 or more 12200Cm 3 or less.
内部空間の最も短い辺の長さ又は直径、最も短い辺以外の辺の長さ、高さ、および体積が前記範囲であることにより、比較的小さい供試体を作製する場合でも、取り扱いが容易なサイズであって且つ設計どおりの密度の供試体を作製することができる。 The shortest side length or diameter of the inner space, the side length other than the shortest side, the height, and the volume are in the above ranges, so handling is easy even when producing a relatively small specimen Specimens of the size and density as designed can be made.
本実施形態の型枠の外形及び外形の寸法は、特に限定されるものではない。 The dimensions of the outer shape and the outer shape of the formwork of the present embodiment are not particularly limited.
次に前述のような吹付けモルタル供試体用の型枠を用いて吹付けモルタル供試体（以下、単に供試体とも言う。）を作製する方法について説明する。
本実施形態の吹付けモルタル供試体の作製方法は、底面部材と側面部材とに囲まれた四角柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有する型枠を用いて、前記開口から前記底面部材に向かってモルタルを吹付けることで前記内部空間にモルタルを充填して、モルタル供試体を作製する吹付けモルタル供試体の作製方法であって、前記内部空間の底面の最も短い辺の長さ（Ｓ）の前記内部空間の高さ（Ｈ）に対する比率Ｓ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と前記比率Ｓ／Ｈの値との積が６０以上であり、前記内部空間の体積が１３０００ｃｍ３未満である方法である。
Next, a method of producing a spray mortar specimen (hereinafter, also simply referred to as a specimen) using a mold for a spray mortar specimen as described above will be described.
According to the method of producing a spray mortar sample of the present embodiment, a quadrangular prism-shaped internal space surrounded by a bottom surface member and a side surface member, the internal space and the external space formed at a position facing the bottom surface member The spray mortar specimen is produced by filling the mortar into the interior space by blowing mortar from the opening toward the bottom member using a mold having an opening communicating with In the manufacturing method, the ratio S / H of the shortest side length (S) of the bottom of the inner space to the height (H) of the inner space is 0.5 or more, and The product of the area (cm 2 ) and the value of the ratio S / H is 60 or more, and the volume of the internal space is less than 13000 cm 3 .
または、本実施形態の吹付けモルタル供試体の作製方法は、底面部材と側面部材とに囲まれた円柱形状の内部空間と、前記底面部材と対向する位置に形成された前記内部空間と外部空間とを連通する開口とを有する型枠を用いて、前記開口から前記底面部材に向かってモルタルを吹付けることで前記内部空間にモルタルを充填して、モルタル供試体を作製する吹付けモルタル供試体の作製方法であって、前記内部空間の底面の直径（Ｄ）の前記内部空間の高さ（Ｈ）に対する比率Ｄ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と前記比率Ｄ/Ｈの値との積が８０以上であり、前記内部空間の体積が１３０００ｍ３未満である方法である。 Alternatively, according to the method of manufacturing the spray mortar sample of the present embodiment, a cylindrical internal space surrounded by the bottom surface member and the side surface member, and the internal space and the external space formed at the position facing the bottom surface member. The mortar is filled with mortar by blowing mortar from the opening toward the bottom surface member using a mold having an opening communicating with the spray mortar to produce a mortar sample The ratio D / H of the diameter (D) of the bottom surface of the internal space to the height (H) of the internal space is 0.5 or more, and the area (cm 2 of the bottom surface of the internal space) ) And the value of the ratio D / H is 80 or more, and the volume of the internal space is less than 13000 m 3 .
具体的には、前述のような本実施形態の型枠の開口から、前記底面部材に向かって吹付けノズルでモルタルを吹付けて、モルタルを内部空間内に充填する。モルタルは、粉体成分と液体成分とを別々に調整して、それぞれ別のホース等で吹付けノズル内に導入し、粉体成分と液体成分とを圧縮空気と共に型枠の内部空間に向かって吹付けられる。 Specifically, mortar is sprayed from the opening of the mold of the present embodiment as described above toward the bottom member with a spray nozzle to fill the mortar into the inner space. In the mortar, the powder component and the liquid component are separately adjusted and introduced into the spray nozzle with separate hoses, etc., and the powder component and the liquid component together with the compressed air are directed toward the inner space of the mold Be sprayed.
本実施形態の型枠が、四角形状の板状体からなる底面部材と、四角形状の３枚の板状体からなる側面部材とから構成され、底面部材の周縁部のうち三辺に各側面部材の一辺が垂直に取り付けられ、底面部材と対向する位置には側面部材の上端縁部に囲まれた開口が形成され、底面部材の一辺側の側面には、側面部材が存在しない、開放部が形成された型枠である場合には、以下のような方法でモルタルを内部空間内に充填する。
すなわち、型枠の前記開放部が下方になるように底面部材を垂直あるは斜めに壁面等に立てかけて型枠を配置する。そして、モルタルを開口から底面部材に向かって吹き付けて内部空間に充填する。
かかる方法でモルタルを吹き付けた場合には、底面部材に吹き付けられて跳ね返ったモルタル（以下、リバウンドともいう）が、型枠内に入らないようにすることができ、より、設計どおりの密度の吹付けモルタル供試体を得ることができる。
The formwork of the present embodiment is composed of a bottom member consisting of a square plate-like body and a side member consisting of three square plate-like bodies. One side of the member is attached vertically, an opening surrounded by the upper end edge of the side member is formed at a position facing the bottom member, and the side member is not present at the side of one side of the bottom member. If the mold is a formed form, the mortar is filled in the inner space by the following method.
That is, the bottom member is vertically or diagonally placed on a wall surface or the like so that the open portion of the form is downward, and the form is disposed. Then, the mortar is sprayed from the opening toward the bottom member to fill the interior space.
When the mortar is sprayed by such a method, the mortar (hereinafter also referred to as a rebound) sprayed to the bottom surface member and rebounded can be prevented from entering the formwork, and more blowing of the density as designed A mortar can be obtained.
吹付けモルタルは前述のような型枠内に吹付けによって充填した場合、ペースト状のモルタルを型枠内に注入して充填する場合よりも、通常は、隅々まで充填しにくい。特に、四角柱形状の内部空間を有する型枠のように、底面の四隅や、４枚（あるいは３枚）の側面部材の側縁部の接合部分に角部が存在する。従って、かかる角部において特にモルタルが充填されにくい。 Spray mortars are generally less likely to fill every corner when filled by spraying into a mold as described above than when paste mortar is poured into the mold and filled. In particular, as in the case of a mold having a quadrangular prism-shaped internal space, corner portions are present at the four corners of the bottom and at the joint portions of the side edges of four (or three) side members. Therefore, it is difficult for mortar to be filled particularly at such corners.
本実施形態の型枠は、前述のようなサイズの内部空間を有するために、モルタルを吹付けて型枠の内部空間に充填した場合にも型枠の隅々にまでモルタルを充填しやすい。従って、モルタルを充填した後に締め固めたりすることなく、設計どおりの密度の供試体を容易に作製できる。 Since the formwork of this embodiment has the internal space of the size as described above, even when the mortar is sprayed and filled in the internal space of the formwork, the mortar can be easily filled to every corner of the formwork. Therefore, it is possible to easily prepare a specimen of the designed density without packing after filling the mortar.
本実施形態の供試体の作製方法においては、モルタルを型枠の開口より上方に盛り上がるように充填し、開口より上方に盛り上がっているモルタル部分をすり切って除去することで、供試体を作製してもよい。この場合には、より設計どおりの、すなわち、型枠の内部空間の体積とより等しい体積の供試体を作製することができる。 In the method of preparing the test piece of the present embodiment, the mortar is filled so as to be raised above the opening of the mold, and the mortar portion which is raised above the opening is scraped and removed to prepare the test body. May be In this case, it is possible to produce a specimen having a volume more as designed, ie, equal to the volume of the internal space of the mold.
本実施形態の供試体の作製方法においては、型枠にモルタルを充填後、モルタルが完全に硬化する前に型枠から取り出し、該モルタルを所望のサイズに切断してもよい。 In the method for producing a specimen of the present embodiment, after filling a mortar in a mold, the mortar may be taken out from the mold before the mortar is completely cured, and the mortar may be cut into a desired size.
次に、吹付けモルタル供試体の作製方法で作製された吹付けモルタル供試体について説明する。
本実施形態の供試体は、硬化後（あるいは所定の養生条件で養生後）、型枠から取り出して、各種評価試験に用いることができる。
供試体は、例えば、以下のようなモルタルの評価試験に使用することができる。
吹付けモルタルは、粉体成分と液体成分とを吹付けノズルから圧縮空気で吹付けることで施工されるため、混合時間も短時間であり、設計どおりの強度、性状等が得られているかどうかを確認する必要がある。
そこで、実際に吹付けによって施工されたモルタルと同様の条件で作製された供試体を用いて、水分率、密度等を測定して、かかる水分率、密度等が設計上の基準を満たしているかどうかを評価する試験を行うことが考えられる。
Next, a spray mortar sample manufactured by the method of manufacturing a spray mortar sample will be described.
The specimen of the present embodiment can be taken out of the mold after curing (or after curing under predetermined curing conditions) and used for various evaluation tests.
The specimen can be used, for example, in the evaluation test of mortar as follows.
Since the spray mortar is constructed by spraying the powder component and the liquid component from the spray nozzle with compressed air, the mixing time is also short, and whether the strength and properties as designed are obtained. You need to make sure.
Therefore, using a specimen produced under the same conditions as the mortar actually constructed by spraying, measure the moisture content, density, etc., and does the moisture content, density, etc. meet the design criteria? It is possible to conduct a test to evaluate whether it is.
具体的には、予めモルタルの水分率及び密度と、モルタルの強度等との相関を測定しておく。そして、本実施形態の供試体を実際に測定するモルタルの配合、吹付け条件で作製して、かかる供試体の水分率及び密度を測定することでモルタルの強度を推測し、基準を満たしているかどうかを評価することができる。
かかる評価試験において本実施形態の供試体を用いた場合、設計どおりの密度の供試体を吹付けによって作製することが容易にできるため、精度よく評価試験を行うことができる。
Specifically, the correlation between the moisture content and density of the mortar and the strength of the mortar and the like is measured in advance. And whether the strength of mortar is inferred by preparing the composition of mortar which actually measures the specimen of the present embodiment under the mixing condition of the mortar and the spraying condition and measuring the moisture content and the density of the specimen, meets the standard? It can be evaluated.
In the case of using the specimen of the present embodiment in the evaluation test, the specimen of the density as designed can be easily manufactured by spraying, so that the evaluation test can be performed with high accuracy.
本実施形態にかかる吹付けモルタル供試体の作製方法、吹付けモルタル供試体用の型枠及び吹付けモルタル供試体は以上のとおりであるが、今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は前記説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 Although the method of preparing the spray mortar specimen according to the present embodiment, the mold for the spray mortar specimen, and the spray mortar specimen are as described above, the embodiment disclosed this time is exemplified in all respects. And should not be considered restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.
以下に、本発明の吹付けモルタルの供試体の作製方法、供試体用の型枠及び供試体についての試験例を示す。 Below, the preparation method of the test body of the spray mortar of this invention, the test frame about a test piece and a test body are shown.
（型枠）
表１及び表２に示すような内寸の四角柱状の木製の型枠及び円柱形状の鋼製の型枠を準備した。
表１及び表２には、型枠の内部（内部空間）の底面の面積（Ａ）、底面の短辺の長さ（Ｓ）又は底面の直径（Ｄ）、高さ（Ｈ）、内部空間の体積、底面の短辺の長さ（Ｓ）又は底面の直径（Ｄ）の高さ（Ｈ）に対する比率（Ｓ／Ｈ）又は（Ｄ／Ｈ）を示す。また、底面の面積（Ａ）と前記比率（Ｓ／Ｈ）又は（Ｄ／Ｈ）との積（Ｐ）を算出した。また、モルタルを吹き付けた後の各型枠の重量も測定した。これらの算出結果及び測定結果も表１に示す。
(Formwork)
As shown in Tables 1 and 2, a square-shaped wooden form with an inner dimension and a cylindrical steel form were prepared.
In Tables 1 and 2, the area (A) of the bottom of the inside (internal space) of the mold, the length (S) of the short side of the bottom or the diameter (D) of the bottom, the height (H), the internal space The ratio (S / H) or (D / H) of the volume, the length (S) of the short side of the bottom or the diameter (D) of the bottom to the height (H). Further, the product (P) of the area (A) of the bottom surface and the ratio (S / H) or (D / H) was calculated. Moreover, the weight of each form after spraying mortar was also measured. These calculation results and measurement results are also shown in Table 1.
（モルタル）
供試体用のモルタルを準備した。モルタルは、以下のような配合の粉体成分（Ａ）、及び液体成分（Ｂ）をそれぞれ調整した。
《配合》
Ａ：粉体成分
・セメント：普通ポルトランドセメント（住友大阪セメント株式会社製）
・細骨材 ：珪砂１号、２号、７号
Ｂ：液体成分
・水：水道水
・液体混和剤：ライオンボンドＡ（住友大阪セメント株式会社製）
(mortar)
A mortar for a sample was prepared. In the mortar, the powder component (A) and the liquid component (B) of the following composition were respectively adjusted.
<< Composition >>
A: Powder component and cement: Ordinary portland cement (made by Sumitomo Osaka Cement Co., Ltd.)
Fine aggregate: Silica sand No. 1, No. 2 and No. 7 B: Liquid component water: tap water liquid admixture: Lion Bond A (Sumitomo Osaka Cement Co., Ltd.)
(供試体の作製方法)
東和式ロータリーガン吹付け機を用いて、表３に示す割合で粉体成分であるセメント、珪砂１号、２号、７号を予め混合した粉体混合物を圧縮空気にてホース内を水平方向に６０ｍ圧送した。
一方、別途、表３に示す割合で液体成分である水とポリマー混和材原液とを混合した液体混合物をポンプにてホース内を水平方向に６０ｍ圧送した。
圧送した粉体混合物と液体混合物とをノズル内で混合して乾式吹付け用モルタル材料とし、前述の型枠内に、型枠の開口縁からモルタルが盛り上がる量まで吹付けて、その後、型枠の開口縁に沿ってモルタルをすり切り型枠内にモルタルを充填した。
(Method of preparing the specimen)
A powder mixture prepared by previously mixing cement, silica sand No. 1, No. 2 and No. 7 which are powder components in the proportions shown in Table 3 using a Towa rotary gun sprayer is horizontally directed in the hose with compressed air 60m was pumped.
On the other hand, separately, a liquid mixture obtained by mixing water as a liquid component and a polymer admixture stock solution at a ratio shown in Table 3 was pressure-fed by 60 m horizontally in a hose by a pump.
The pumped powder mixture and liquid mixture are mixed in a nozzle to form a dry spray mortar material, and sprayed into the above-mentioned form to the extent that the mortar rises from the opening edge of the form, and then the form The mortar was poured into the mold along the opening edge of the mortar.
（密度のバラツキの測定）
前記モルタルが充填された型枠の重量をまず測定した。さらに、予め測定しておいた型枠の重量とモルタルが充填された型枠の重量との差から供試体の重量を算出した。また、型枠の内部（内部空間）の底面の面積（Ａ）、底面の短辺の長さ（Ｓ）又は底面の直径（Ｄ）、高さ（Ｈ）から、型枠の内部空間の体積を算出し、これを供試体の体積とした。
これらの供試体の重量及び体積とから供試体の密度を算出した。
各サイズの型枠につき供試体を５個ずつ作製し、
密度の標準偏差及び平均値から変動係数を算出した。
変動係数が３．０％以上、密度が２．０５以上２．１５以下のものを○、この範囲から外れるものを×として評価した。
結果を表１及び表２に示す。
(Measurement of density variation)
The weight of the mold filled with the mortar was first measured. Furthermore, the weight of the sample was calculated from the difference between the weight of the mold measured in advance and the weight of the mold filled with mortar. From the area (A) of the bottom of the mold (internal space), the length (S) of the short side of the bottom (S) or the diameter (D) of the bottom and the height (H), the volume of the internal space of the mold Was calculated, and this was taken as the volume of the specimen.
The density of the specimen was calculated from the weight and volume of these specimens.
For each size of formwork, make five specimens at a time,
The coefficient of variation was calculated from the standard deviation of the density and the mean value.
A coefficient of variation of 3.0% or more and a density of 2.05 or more and 2.15 or less were evaluated as ○, and those out of this range as x.
The results are shown in Tables 1 and 2.
表１に示すように、四角形状である型枠については、前記比率Ｓ／Ｈが０．５以上であり、底面の面積と前記比率Ｓ／Ｈとの積（Ｐ）が６０以上であって、且つ内部空間の体積が１３．０リットル（１３０００ｃｍ３）未満である各実施例及び参考例は、供試体の密度のバラツキである密度変動係数がすべて３．０％未満、密度が２．０５以上２．１５以下であった。すなわち、モルタルは型枠内に一定の密度になるように充填できていることがわかる。モルタルが型枠内に充填が十分にできておらず隙間が生じている場合には、充填されたモルタルの重量にバラツキが生じて密度にもバラツキが生じる。このことから、実施例及び参考例の型枠を使用した場合には、型枠内にモルタルが隙間なく充填されていたことが明らかである。また、吹き付け後の型枠重量も２５ｋｇを越えることがなく、すなわち、運搬等の取り扱いが容易なサイズ、重量であった。
As shown in Table 1, for a mold frame having a rectangular shape, the ratio S / H is 0.5 or more, and the product (P) of the area of the bottom surface and the ratio S / H is 60 or more. In each of the examples and reference examples in which the volume of the inner space is less than 13.0 liters (13000 cm 3 ), the density variation coefficient, which is the variation of the density of the sample, is less than 3.0%, and the density is 2.05. It was above 2.15. That is, it can be seen that the mortar can be filled in the mold so as to have a constant density. When the mortar is not sufficiently filled in the mold and a gap is generated, the weight of the filled mortar varies and the density also varies. From this, it is clear that the mortar was filled in the formwork without gaps when the formwork of the example and the reference example was used. In addition, the weight of the mold after spraying did not exceed 25 kg, that is, the size and weight were easy to handle such as carrying.
一方、前記比率Ｓ／Ｈが０．３である比較例３は、密度変動係数が３．９％とバラツキが非常に大きく、型枠に充填されたモルタルの重量にバラツキが生じていたことが明らかである。 On the other hand, in Comparative Example 3 in which the ratio S / H is 0.3, the variation coefficient is very large at 3.9%, and the weight of the mortar filled in the form is dispersed it is obvious.
また、表２に示すように、円柱形状である型枠については、前記比率Ｓ／Ｈが０．５以上であり、底面の面積と前記比率Ｓ／Ｄとの積（Ｐ）が８０以上である各実施例及び参考例は、供試体の密度のバラツキである密度変動係数がすべて３．０％未満であった。すなわち、モルタルは型枠内に一定の密度になるように充填できていることがわかる。
Further, as shown in Table 2, for a mold having a cylindrical shape, the ratio S / H is 0.5 or more, and the product (P) of the area of the bottom surface and the ratio S / D is 80 or more. In each of the examples and reference examples , the density variation coefficient, which is the variation in the density of the specimen, was all less than 3.0%. That is, it can be seen that the mortar can be filled in the mold so as to have a constant density.
一方、前記比率Ｓ／Ｈが１．０である比較例４は、密度が２．０４であった。また、前記比率Ｄ／Ｈが０．４、底面の面積と前記比率Ｄ／Ｈとの積（Ｐ）が７６である比較例５は密度が２．０４であり、底面の面積と前記比率Ｄ／Ｈとの積（Ｐ）が３９である比較例６は圧縮空気が型枠内に滞留するためモルタルの充填ができず、吹付け後の型枠を脱型した際に供試体が型枠と同様の形状を維持できていなかったため強度試験の実施ができなかった。 On the other hand, Comparative Example 4 in which the ratio S / H is 1.0 has a density of 2.04. Further, Comparative Example 5 in which the ratio D / H is 0.4 and the product (P) of the area of the bottom surface and the ratio D / H is 76 is a density of 2.04, and the area of the bottom surface and the ratio D In Comparative Example 6 in which the product (P) with / H is 39, the compressed air is retained in the mold and the mortar can not be filled, and the specimen is the mold when the mold after spraying is removed And the same shape could not be maintained and the strength test could not be performed.
Claims (9)
前記内部空間の底面の最も短い辺の長さ（Ｓ）の前記内部空間の高さ（Ｈ）に対する比率Ｓ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｓ／Ｈの値との積が７０以上５００００以下であり、前記内部空間の体積が１３０００ｃｍ３未満であり、
乾式吹付けにより前記内部空間に前記モルタルを充填するのに用いられる吹付けモルタル供試体用の型枠。 It has an inner space of a quadrangular prism shape surrounded by the bottom surface member and the side surface member, and an opening for connecting the inside space and the outside space formed at a position opposite to the bottom surface member, It is a formwork for a spray mortar specimen for filling the mortar into the inner space by spraying the mortar toward the member and producing a mortar specimen,
The ratio S / H of the shortest side length (S) of the bottom of the internal space to the height (H) of the internal space is 0.5 or more, and the area (cm 2 ) of the bottom of the internal space the ratio product of the value of S / H is 70 to 50,000, the volume of the inner space Ri der than 13000Cm 3,
Mold for spray mortar specimens that used to fill the mortar into the inner space by the dry spraying.
前記内部空間の底面の最も短い辺の長さ（Ｓ）の前記内部空間の高さ（Ｈ）に対する比率Ｓ／Ｈが０．５以上１２．５以下であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｓ／Ｈの値との積が７０以上であり、前記内部空間の体積が１３０００ｃｍ３未満であり、
乾式吹付けにより前記内部空間に前記モルタルを充填するのに用いられる吹付けモルタル供試体用の型枠。 It has an inner space of a quadrangular prism shape surrounded by the bottom surface member and the side surface member, and an opening for connecting the inside space and the outside space formed at a position opposite to the bottom surface member, It is a formwork for a spray mortar specimen for filling the mortar into the inner space by spraying the mortar toward the member and producing a mortar specimen,
The ratio S / H of the shortest side length (S) of the bottom of the internal space to the height (H) of the internal space is 0.5 or more and 12.5 or less, and the area of the bottom of the internal space ( cm 2), the product of the value of the ratio S / H is not less than 70, the volume of the inner space Ri der than 13000Cm 3,
Mold for spray mortar specimens that used to fill the mortar into the inner space by the dry spraying.
前記内部空間の底面の直径（Ｄ）の前記内部空間の高さ（Ｈ）に対する比率Ｄ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｄ／Ｈの値との積が８９以上であり、前記内部空間の体積が１３０００ｃｍ３未満であり、
乾式吹付けにより前記内部空間に前記モルタルを充填するのに用いられる吹付けモルタル供試体用の型枠。 A cylindrical internal space surrounded by the bottom surface member and the side surface member, and an opening for communicating the internal space and the external space formed at a position facing the bottom surface member, and from the opening to the bottom surface member It is a formwork for a spray mortar specimen for filling the mortar into the inner space by spraying the mortar toward the surface to produce a mortar specimen,
The ratio D / H of the diameter (D) of the bottom of the internal space to the height (H) of the internal space is 0.5 or more, and the area (cm 2 ) of the bottom of the internal space and the ratio D / the product of the value of H is not less 89 or more, the volume of the inner space Ri der than 13000Cm 3,
Mold for spray mortar specimens that used to fill the mortar into the inner space by the dry spraying.
前記内部空間の底面の直径（Ｄ）の前記内部空間の高さ（Ｈ）に対する比率Ｄ／Ｈが０．６以上であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｄ／Ｈの値との積が８０以上であり、前記内部空間の体積が１３０００ｃｍ３未満であり、
乾式吹付けにより前記内部空間に前記モルタルを充填するのに用いられる吹付けモルタル供試体用の型枠。 A cylindrical internal space surrounded by the bottom surface member and the side surface member, and an opening for communicating the internal space and the external space formed at a position facing the bottom surface member, and from the opening to the bottom surface member It is a formwork for a spray mortar specimen for filling the mortar into the inner space by spraying the mortar toward the surface to produce a mortar specimen,
The ratio D / H of the diameter (D) of the bottom of the internal space to the height (H) of the internal space is 0.6 or more, and the area (cm 2 ) of the bottom of the internal space and the ratio D / the product of the value of H is not less than 80, the volume of the inner space Ri der than 13000Cm 3,
Mold for spray mortar specimens that used to fill the mortar into the inner space by the dry spraying.
前記内部空間の底面の直径（Ｄ）の前記内部空間の高さ（Ｈ）に対する比率Ｄ／Ｈが０．５以上であり、前記内部空間の底面の面積（ｃｍ２）と、前記比率Ｄ／Ｈの値との積が８０以上であり、前記内部空間の体積が１５７０ｃｍ３以下であり、
乾式吹付けにより前記内部空間に前記モルタルを充填するのに用いられる吹付けモルタル供試体用の型枠。 A cylindrical internal space surrounded by the bottom surface member and the side surface member, and an opening for communicating the internal space and the external space formed at a position facing the bottom surface member, and from the opening to the bottom surface member It is a formwork for a spray mortar specimen for filling the mortar into the inner space by spraying the mortar toward the surface to produce a mortar specimen,
The ratio D / H of the diameter (D) of the bottom of the internal space to the height (H) of the internal space is 0.5 or more, and the area (cm 2 ) of the bottom of the internal space and the ratio D / the product of the value of H is not less than 80, the volume of the inner space Ri der 1570 cm 3 or less,
Mold for spray mortar specimens that used to fill the mortar into the inner space by the dry spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014090374A JP6514442B2 (en) | 2014-04-24 | 2014-04-24 | Preparation method of spray mortar specimen, formwork for spray mortar specimen, and spray mortar specimen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014090374A JP6514442B2 (en) | 2014-04-24 | 2014-04-24 | Preparation method of spray mortar specimen, formwork for spray mortar specimen, and spray mortar specimen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015208883A JP2015208883A (en) | 2015-11-24 |
| JP6514442B2 true JP6514442B2 (en) | 2019-05-15 |
Family
ID=54611511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014090374A Active JP6514442B2 (en) | 2014-04-24 | 2014-04-24 | Preparation method of spray mortar specimen, formwork for spray mortar specimen, and spray mortar specimen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6514442B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593390B (en) * | 2018-07-20 | 2024-04-02 | 南京工程学院 | Prefabricated mortar crack test piece manufacturing die and application method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546362U (en) * | 1977-06-15 | 1979-01-17 | ||
| JPS6117403Y2 (en) * | 1979-03-20 | 1986-05-28 | ||
| JPH0760130B2 (en) * | 1992-03-24 | 1995-06-28 | 建設基礎エンジニアリング株式会社 | Test method for spray-cured material |
| JP3543880B2 (en) * | 1995-10-20 | 2004-07-21 | 東レ株式会社 | Carbon fiber for reinforcing cement-based inorganic material, molded article of carbon fiber-reinforced cement-based inorganic material, and method for producing the same |
| JP3961452B2 (en) * | 2003-06-18 | 2007-08-22 | 湯来土地開発株式会社 | Concrete spraying method |
| JP5405418B2 (en) * | 2010-08-27 | 2014-02-05 | 電気化学工業株式会社 | Cement setting accelerator, spraying material and spraying method using the same |
-
2014
- 2014-04-24 JP JP2014090374A patent/JP6514442B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015208883A (en) | 2015-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9993941B2 (en) | Methods and systems for the formation and use of reduced weight building blocks forms | |
| JP2016527175A (en) | Composite structural materials and aggregates therefor | |
| JP7199942B2 (en) | Ultra-high-strength concrete and its mixing method | |
| CN107313605A (en) | A kind of hollowing restorative procedure | |
| JP6514442B2 (en) | Preparation method of spray mortar specimen, formwork for spray mortar specimen, and spray mortar specimen | |
| JPH0345544A (en) | Concrete blend composition | |
| JP2011169894A (en) | Quality control testing method for crack-resistant concrete | |
| JP2013015382A (en) | Method for testing quality management of crack suppression control | |
| CN106018233A (en) | Device for acquiring void structure of large-void asphalt mixture and method | |
| CN204116119U (en) | Make the filler equipment of vibro-hydro pressed concrete cubic compressive strength standard component | |
| US20170349487A1 (en) | Fibers for Reinforcing Concrete | |
| CN102536202B (en) | Method for manufacturing test piece for testing gas storage well completion sleeve-cement ring bonding strength | |
| Lee et al. | Engineering properties of foamed concrete containing water repellent | |
| KR101586489B1 (en) | Mortar flooring color finishing material and the manufacturing method thereof | |
| JP2023129199A (en) | Construction method for inorganic materials | |
| Eme et al. | Effect of coarse aggregate gradation on workability and flexural strength of cement concrete | |
| JP4476859B2 (en) | Dry mortar spraying method | |
| CN207736480U (en) | Cylinder concrete test block die trial | |
| CN206281700U (en) | A kind of levelling flip-shell cement mortar tryout | |
| Peter et al. | Further Investigations into premix GRC | |
| CN210651188U (en) | Sand rubber setting gauge with easily replaced setting piece | |
| Grigorjev et al. | Comparative Evaluation of Properties of Laboratory Test Specimens for Masonry Mortars Prepared Using Different Compaction Methods | |
| Kucharczyková et al. | Early-age behaviour of cement-based self-leveling flooring compounds | |
| JP4907409B2 (en) | Formwork for shotcrete specimens, formwork unit and method for producing shotcrete specimens | |
| CN106596239B (en) | An adjustable flat cover type cement mortar trial mold and its application method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20170316 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20180202 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20180131 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20180402 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20180921 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20181220 |
|
| A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20190204 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20190328 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20190412 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6514442 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |