JP5041503B2 - Quick set - Google Patents
Quick set Download PDFInfo
- Publication number
- JP5041503B2 JP5041503B2 JP2004379420A JP2004379420A JP5041503B2 JP 5041503 B2 JP5041503 B2 JP 5041503B2 JP 2004379420 A JP2004379420 A JP 2004379420A JP 2004379420 A JP2004379420 A JP 2004379420A JP 5041503 B2 JP5041503 B2 JP 5041503B2
- Authority
- JP
- Japan
- Prior art keywords
- parts
- weight
- cement
- setting agent
- quick setting
- 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.)
- Expired - Fee Related
Links
- 239000004568 cement Substances 0.000 claims description 69
- 239000003795 chemical substances by application Substances 0.000 claims description 67
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 37
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 36
- 239000004567 concrete Substances 0.000 claims description 26
- 239000010440 gypsum Substances 0.000 claims description 25
- 229910052602 gypsum Inorganic materials 0.000 claims description 25
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 24
- 239000011734 sodium Substances 0.000 claims description 18
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 49
- 239000007921 spray Substances 0.000 description 28
- 238000005507 spraying Methods 0.000 description 13
- 230000035515 penetration Effects 0.000 description 11
- 239000003638 chemical reducing agent Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 230000007774 longterm Effects 0.000 description 7
- 239000011575 calcium Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- -1 calcium aluminates Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000011378 shotcrete Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000007589 penetration resistance test Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Lining And Supports For Tunnels (AREA)
Description
本発明は、トンネル、地下空間、法面等の建設工事に適する吹付け工法に用いる吹付材及びこれに用いる急結剤に関し、特に、初期強度がセメントの品質変動の影響を受け難く且つ高い吹付材及びこれに用いる急結剤に関する。 The present invention relates to a spray material used for a spraying method suitable for construction work such as tunnels, underground spaces, and slopes, and a quick setting agent used for the same, and in particular, the initial strength is hardly affected by cement quality fluctuation and high spraying. The present invention relates to a material and a quick setting agent used therefor.
トンネル、地下空間、法面等の建設工事においてコンクリートを打設する方法として、吹付けコンクリート即ち吹付材を用いた吹付け工法が用いられている。一般の吹付け工法においては、ベースコンクリートと急結剤を別々の輸送管を通して別経路で圧送し、圧送途中で合流混合した後に吹付けノズルの筒先より地山等に吹き付けている。近年、吹付材には、施工サイクルを短縮させることや安全性を向上させることを目的として、高い初期強度となる吹付材が求められている。その例として、セメントとセッコウとを主成分とするベースコンクリートと、カルシウムアルミネートを主成分とする急結剤とを含有してなる吹付材が知られている（例えば特許文献１参照。）。 As a method for placing concrete in construction works such as tunnels, underground spaces, and slopes, a spraying method using sprayed concrete, that is, a spraying material, is used. In the general spraying method, the base concrete and the quick-setting agent are pumped by different paths through separate transport pipes, and after merging and mixing in the middle of the pumping, they are sprayed from the tip of the spray nozzle onto the ground. In recent years, a spray material having a high initial strength has been demanded for the purpose of shortening a construction cycle and improving safety. As an example, there is known a spraying material containing a base concrete mainly composed of cement and gypsum and a rapid setting agent mainly composed of calcium aluminate (for example, see Patent Document 1).
しかしながら、本発明者らの研究により、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるベースコンクリートに急結剤を添加すると、吹付材の初期強度がセメントの品質変動の影響を受けやすいという現象が見られた。例えば、吹付材の材齢１０分における圧縮強度が２．０Ｎ／ｍｍ２以上必要な場合に、セメントの品質が変わったために材齢１０分における圧縮強度が３．０Ｎ／ｍｍ２から０．８Ｎ／ｍｍ２に低下した。吹付けコンクリートが所要の強度を満たしていない場合に次工程の作業を行うと、地山が崩落するといった重大事故につながる虞がある。解決策として、吹付材施工毎に試験吹付けを行い、初期強度を確認し、強度が低すぎる場合には急結剤添加量等の調整により初期強度を高め、その後に吹付け施工を行なう方法も考えられるが、試験回数が極めて多くなるため、現実的ではない。セメントの品質変動は、特に異なった製造元の複数のセメントを用い且つこれらを予め混合せずに用いる場合に大きく、その影響も大きい。
本発明は前記問題の解決、即ち、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるベースコンクリートに急結剤を添加する場合に、吹付材の初期強度がセメントの品質変動の影響を受け難く且つ高い急結剤を提供することを目的とする。また、本発明は、初期強度がセメントの品質変動の影響を受け難く且つ高い吹付材を提供することを目的とする。 The present invention solves the above-mentioned problem, that is, the quick addition agent is added to the base concrete in which the total amount of gypsum contained in the admixture excluding the cement and the quick setting agent exceeds 5 parts by weight in terms of SO 3 with respect to 100 parts by weight of the cement. In this case, an object of the present invention is to provide a quick setting agent in which the initial strength of the spray material is not easily affected by the quality variation of the cement. Another object of the present invention is to provide a spraying material whose initial strength is not easily affected by cement quality fluctuations and is high.
本発明者等は、前記課題解決のため鋭意検討した結果、用いる急結剤及び用いるベースコンクリートを各々特定のものにすることで、吹付材の初期強度がセメントの品質変動の影響を受け難く且つ高くなることを見出し、本発明を完成させた。即ち、本発明は、以下の（１）又は（２）で表す急結剤である。
（１）セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるベースコンクリートに添加する急結剤であって、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、カルシウムアルミネート類７０〜９０重量部と、Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０.６５以上１．００未満であるアルミン酸ナトリウム１０〜３０重量部とを含む急結剤。（２）更に、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、水和活性アルミナ類５〜２０重量部とを含む上記（１）の急結剤。
As a result of intensive studies for solving the above problems, the present inventors made the initial setting strength of the sprayed material less affected by the cement quality variation by making each of the quick setting agent and the base concrete used specific. As a result, the present invention was completed. That is, the present invention is a rapid setting agent represented by the following (1) or (2).
(1) A quick setting agent added to base concrete in which the total amount of gypsum contained in the admixture excluding cement and quick setting agent exceeds 5 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement, and calcium aluminate Sodium aluminate having a molar ratio of Na 2 O / Al 2 O 3 of 0.65 or more and less than 1.00 to 70 to 90 parts by weight of calcium aluminate with respect to a total of 100 parts by weight of sodium and sodium aluminate A quick setting agent comprising -30 parts by weight. (2) The rapid setting agent according to (1), further comprising 5 to 20 parts by weight of hydrated activated alumina with respect to 100 parts by weight of calcium aluminate and sodium aluminate in total .
本発明によれば、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるベースコンクリートに急結剤を添加する場合に、吹付材の初期強度がセメントの品質変動の影響を受け難く且つ高い急結剤が得られる。また、初期強度がセメントの品質変動の影響を受け難く且つ高い吹付材が得られる。地山等に吹き付けた吹付材の初期強度が安定して高いので、施工サイクルを短縮させることができ且つ安全性が高い吹付材及び吹付け工法が得られる。 According to the present invention, when the total amount of gypsum contained in the admixture excluding cement and rapid setting agent is added to the base concrete exceeding 5 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement, The initial strength of the spray material is not easily affected by the quality variation of the cement, and a high setting agent is obtained. In addition, a spray material whose initial strength is hardly affected by the quality variation of the cement and which is high can be obtained. Since the initial strength of the spray material sprayed on the ground is stable and high, a spray material and a spray method that can shorten the construction cycle and have high safety can be obtained.
本発明の急結剤は、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるベースコンクリートに添加する急結剤であって、カルシウムアルミネート類と、Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０.６５以上１．００未満であるアルミン酸ナトリウムとを含むものとする。好ましくは、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、カルシウムアルミネート類７０〜９８重量部と、Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０.６５以上１．００未満であるアルミン酸ナトリウム２〜３０重量部とを含むものとする。より好ましくは、更に、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、水和活性アルミナ類５〜２０重量部を含むものとする。尚、本発明の急結剤をベースコンクリートに添加する方法は、特に限定されない。 The quick setting agent of the present invention is a quick setting agent added to base concrete in which the total amount of gypsum contained in the admixture excluding cement and the quick setting agent exceeds 5 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement. And calcium aluminate and sodium aluminate having a molar ratio of Na 2 O / Al 2 O 3 of 0.65 or more and less than 1.00. Preferably, the molar ratio of calcium aluminate 70 to 98 parts by weight and Na 2 O / Al 2 O 3 is 0.65 or more and less than 1.00 with respect to a total of 100 parts by weight of calcium aluminate and sodium aluminate. And 2 to 30 parts by weight of sodium aluminate. More preferably, it further contains 5 to 20 parts by weight of hydrated activated alumina with respect to 100 parts by weight of the total of calcium aluminate and sodium aluminate. In addition, the method of adding the quick setting agent of this invention to base concrete is not specifically limited.
本発明に使用するカルシウムアルミネート類としては、カルシウムアルミネート、カルシウムハロアルミネート、カルシウムナトリウムアルミネート、カルシウムサルホアルミネート並びにこれらにＳｉＯ２、Ｋ２Ｏ、Ｆｅ２Ｏ３、ＴｉＯ２等が固溶又は化合したもの群から選ばれる一種又は二種以上を用いることができる。これらのカルシウムアルミネート類は、化合物、固溶体、ガラス質又はこのうち二種以上が共存するものであっても良い。用いるカルシウムアルミネート類の粉末度は、吹付材の初期強度が高いことから、ブレーン比表面積で４０００ｃｍ２／ｇ以上が好ましく、５０００ｃｍ２／ｇ以上がより好ましい。 Calcium aluminate used in the present invention includes calcium aluminate, calcium haloaluminate, calcium sodium aluminate, calcium sulfoaluminate, and SiO 2 , K 2 O, Fe 2 O 3 , TiO 2 and the like. One or two or more selected from a group of dissolved or combined compounds can be used. These calcium aluminates may be compounds, solid solutions, glassy materials, or two or more of them may coexist. Fineness of calcium aluminates, since the initial strength of the sprayed material is high, preferably 4000 cm 2 / g or more in Blaine specific surface area, 5000 cm 2 / g or more is more preferably used.
本発明の急結剤におけるカルシウムアルミネート類の含有量は、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、カルシウムアルミネート類７０〜９８重量部とすることが好ましい。７０重量部未満の場合、急結性が低下するとともに吹付材の長期強度が低くなるので好ましくない。９８重量部を超えると、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるベースコンクリートに急結剤を添加する場合に、吹付材の初期強度がセメントの品質変動の影響を受け易くなるので好ましくない。より好ましいカルシウムアルミネート類の含有量は、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、カルシウムアルミネート類８０〜９０重量部とする。 The content of calcium aluminate in the quick setting agent of the present invention is preferably 70 to 98 parts by weight of calcium aluminate with respect to 100 parts by weight of calcium aluminate and sodium aluminate in total. When the amount is less than 70 parts by weight, the quick setting property is lowered and the long-term strength of the spray material is lowered, which is not preferable. When the amount exceeds 98 parts by weight, when the total amount of gypsum contained in the admixture excluding cement and rapid setting agent exceeds 5 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement, the quick setting agent is added. The initial strength of the spray material is not preferable because it is easily affected by cement quality fluctuations. A more preferable content of calcium aluminate is 80 to 90 parts by weight of calcium aluminate with respect to 100 parts by weight of calcium aluminate and sodium aluminate in total.
本発明に使用するアルミン酸ナトリウムは、Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０.６５以上１．００未満であるアルミン酸ナトリウムとする。Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が１．００以上では、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるベースコンクリートに急結剤を添加する場合に、吹付材の初期強度がセメントの品質変動の影響を受け易い。また、Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０.６５未満では、急結性が低下し、吹付材の初期強度が低下する。好ましくは、Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０.７２〜０．９５であるアルミン酸ナトリウムとする。 The sodium aluminate used in the present invention is sodium aluminate having a Na 2 O / Al 2 O 3 molar ratio of 0.65 or more and less than 1.00. When the molar ratio of Na 2 O / Al 2 O 3 is 1.00 or more, the total amount of gypsum contained in the admixture excluding cement and the quick setting agent exceeds 5 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement. When a quick setting agent is added to the base concrete, the initial strength of the spraying material is easily affected by variations in cement quality. On the other hand, when the molar ratio of Na 2 O / Al 2 O 3 is less than 0.65, the quick setting property is lowered and the initial strength of the spray material is lowered. Preferably, the molar ratio of Na 2 O / Al 2 O 3 is the sodium aluminate is from 0.72 to 0.95.
本発明の急結剤におけるアルミン酸ナトリウムの含有量は、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、アルミン酸ナトリウム２〜３０重量部とすることが好ましい。２重量部未満の場合、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５．０重量部を超えるベースコンクリートに急結剤を添加する場合に、吹付材の初期強度がセメントの品質変動の影響を受け易くなるので好ましくない。３０重量部を超えると、急結性が低下するとともに吹付材の長期強度が低くなるので好ましくない。より好ましいアルミン酸ナトリウムの含有量は、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、アルミン酸ナトリウム１０〜２０重量部とする。 The content of sodium aluminate in the quick setting agent of the present invention is preferably 2 to 30 parts by weight of sodium aluminate with respect to 100 parts by weight of calcium aluminate and sodium aluminate in total. When the amount is less than 2 parts by weight, the quick-setting agent is added to the base concrete in which the total amount of gypsum contained in the admixture excluding cement and the quick-setting agent exceeds 5.0 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement. In this case, the initial strength of the spray material is not preferable because it is easily affected by the quality variation of the cement. If it exceeds 30 parts by weight, the quick setting property is lowered and the long-term strength of the spray material is lowered, which is not preferable. A more preferable content of sodium aluminate is 10 to 20 parts by weight of sodium aluminate with respect to 100 parts by weight of calcium aluminate and sodium aluminate in total.
本発明の急結剤に、更に、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、水和活性アルミナ類５〜２０重量部を含むと、急結性が高まるので好ましい。より好ましくは、５〜１５重量部とする。最も好ましくは、１０〜１５重量部とする。２０重量部を超えると、カルシウムアルミネート類及びアルミン酸ナトリウムの含有量が減るために急結性が高まらず、吹付材の初期強度又は長期強度が不足することがある。また、５重量部未満では、水和活性アルミナ類を含有させた効果が得難い。 It is preferable that the quick setting agent of the present invention further contains 5 to 20 parts by weight of hydrated activated alumina with respect to a total of 100 parts by weight of calcium aluminate and sodium aluminate because quick setting is enhanced. More preferably, it is 5 to 15 parts by weight. Most preferably, it is 10 to 15 parts by weight. If it exceeds 20 parts by weight, the content of calcium aluminate and sodium aluminate is reduced, so that quick setting is not improved, and the initial strength or long-term strength of the spray material may be insufficient. Moreover, if it is less than 5 weight part, it is difficult to obtain the effect of containing hydrated activated aluminas.
本発明で使用する水和活性アルミナ類としては、水又は水の存在下においてその他の急結成分やセメントと速やかに反応する活性の高い非晶質又は結晶度の低いアルミナ物質、或いは水酸化アルミニウムで、例えば活性アルミナ、水硬性アルミナ、γ−アルミナ、ベーマイト、水酸化アルミニウム等が挙げられ、これらの一種又は二種以上を使用することができる。尚、α−アルミナは結晶度が高く、活性が低いので適当ではない。当該水和活性アルミナ類の平均粒子径は２００μｍ以下が好ましく、より好ましくは３０μｍ以下、最も好ましくは１５μｍ以下とする。尚、ここで平均粒子径とは、レーザー回折・散乱法により求めたものとする。 Examples of the hydrated activated aluminas used in the present invention include high-activity amorphous or low-crystalline alumina substances that react quickly with other rapid-setting components and cement in the presence of water or water, or aluminum hydroxide For example, activated alumina, hydraulic alumina, γ-alumina, boehmite, aluminum hydroxide and the like can be used, and one or more of these can be used. Α-Alumina is not suitable because it has high crystallinity and low activity. The average particle diameter of the hydrated activated alumina is preferably 200 μm or less, more preferably 30 μm or less, and most preferably 15 μm or less. Here, the average particle diameter is determined by a laser diffraction / scattering method.
本発明の吹付材は、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるベースコンクリートと、上記の急結剤とを含有する。上記の急結剤の使用量は、セメント１００重量部に対し、３〜１５重量部が好ましく、より好ましくは７〜１２重量部とする。３重量部未満では吹付材の初期強度又は／及び長期強度が不足することがあり、１５重量部を超えると吹付材の長期強度が低下することがある。 The spray material of the present invention comprises a base concrete in which the total amount of gypsum contained in an admixture excluding cement and a quick setting agent exceeds 5 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement, and the quick setting agent described above. contains. The amount of the rapid setting agent is preferably 3 to 15 parts by weight, more preferably 7 to 12 parts by weight, based on 100 parts by weight of cement. If it is less than 3 parts by weight, the initial strength and / or long-term strength of the spray material may be insufficient, and if it exceeds 15 parts by weight, the long-term strength of the spray material may be reduced.
本発明で使用するベースコンクリートは、セメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超えるコンクリートを用いる。５重量部以下では吹付材の初期強度が不足する。吹付材の長期強度が高くなることから、好ましくはセメントと急結剤を除く混和材料に含まれる石膏の合計が、セメント１００重量部に対しＳＯ３換算で５重量部を超え２０重量部以下とし、より好ましくは５重量部を超え１５重量部以下、最も好ましく５重量部を超え１０重量部以下はとする。セメントと急結剤を除く混和材料に含まれる石膏の合計が２０重量部を超えると、吹付材の長期強度が低下するので好ましくない。使用する石膏の種類は特に限定されず、無水石膏、半水石膏、ニ水石膏から選ばれる一種を単独使用又二種以上を併用してもよい。また、石膏の粉末度は、より少ない石膏の使用量で高い初期強度が得られることから、ブレーン比表面積で４０００ｃｍ２／ｇ以上が好ましく、６０００ｃｍ２／ｇ以上がより好ましい。ベースコンクリートへ石膏を含有させる方法は特に限定されず、例えばセメント中に含有させても、急結剤を除く混和材料中に含有させても、又別途石膏単独でベースコンクリートに混和しても良く、これらを組み合わせても良い。 The base concrete used in the present invention is a concrete in which the total amount of gypsum contained in the admixture excluding cement and quick setting agent exceeds 5 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement. Below 5 parts by weight, the initial strength of the spray material is insufficient. Since the long-term strength of the spray material increases, the total amount of gypsum contained in the admixture excluding cement and the quick setting agent is preferably more than 5 parts by weight and less than 20 parts by weight in terms of SO 3 with respect to 100 parts by weight of cement. More preferably, it is more than 5 parts by weight and 15 parts by weight or less, most preferably more than 5 parts by weight and 10 parts by weight or less. If the total amount of gypsum contained in the admixture excluding the cement and the quick setting agent exceeds 20 parts by weight, the long-term strength of the spray material is lowered, which is not preferable. The kind of gypsum to be used is not particularly limited, and one kind selected from anhydrous gypsum, hemihydrate gypsum, and dihydrate gypsum may be used alone, or two or more kinds may be used in combination. Also, fineness of gypsum, since the high initial strength using a smaller amount of gypsum is obtained, preferably 4000 cm 2 / g or more in Blaine specific surface area, 6000 cm 2 / g or more is more preferable. The method of adding gypsum to the base concrete is not particularly limited. For example, the gypsum may be contained in cement, in an admixture excluding the quick setting agent, or separately in gypsum alone. These may be combined.
本発明で使用するベースコンクリートには、少なくともセメント及び水が含まれ、本発明の効果を損なわない範囲で、必要により更にモルタルやコンクリートで使用可能な骨材や混和材料を添加しても良い。セメントとしては、例えば、普通，早強，中庸熱，低熱ポルトランドセメント等のポルトランドセメントや、高炉セメント，フライアッシュセメント等の混合セメント、或いは、都市ゴミ焼却灰や下水汚泥焼却灰等の廃棄物を原料として利用したエコセメント等が挙げられ、これらの一種又は二種以上を使用することができる。また、骨材としては、例えば、川砂、陸砂、海砂、砕砂、珪砂、川砂利、陸砂利、砕石及び人工骨材等が挙げられ、これらの一種又は二種以上を使用することができる。また、混和材料としては、例えば、高性能減水剤，高性能ＡＥ減水剤，ＡＥ減水剤及び流動化剤を含む減水剤、シリカフューム等のポゾラン、高炉スラグ等の潜在水硬性物質、石粉、樹脂エマルション、膨張材、起泡剤、発泡剤、防錆剤、顔料、繊維、撥水剤、防水材、消泡剤、凝結遅延剤、硬化促進剤、粉塵低減剤、収縮低減剤、水中不分離性混和剤等が挙げられ、これらの一種又は二種以上を本発明による効果を阻害しない範囲で使用することができる。 The base concrete used in the present invention contains at least cement and water, and may further add an aggregate or an admixture that can be used in mortar or concrete as long as the effects of the present invention are not impaired. As cement, for example, Portland cement such as normal, early strength, moderate heat, low heat Portland cement, mixed cement such as blast furnace cement and fly ash cement, waste such as municipal waste incineration ash and sewage sludge incineration ash The eco-cement etc. which were utilized as a raw material are mentioned, These 1 type (s) or 2 or more types can be used. Examples of the aggregate include river sand, land sand, sea sand, crushed sand, quartz sand, river gravel, land gravel, crushed stone, and artificial aggregate, and one or more of these can be used. . Examples of admixture materials include high-performance water-reducing agents, high-performance AE water-reducing agents, water-reducing agents containing AE water-reducing agents and fluidizing agents, pozzolans such as silica fume, latent hydraulic substances such as blast furnace slag, stone powder, and resin emulsions. , Expansion agent, foaming agent, foaming agent, rust preventive agent, pigment, fiber, water repellent, waterproofing material, antifoaming agent, setting retarder, curing accelerator, dust reducing agent, shrinkage reducing agent, underwater separability An admixture etc. are mentioned, These 1 type (s) or 2 or more types can be used in the range which does not inhibit the effect by this invention.
本発明の吹付材を製造する方法及び使用する方法は、特に限定されない。 The method for producing and using the spray material of the present invention is not particularly limited.
以下、実施例により本発明を説明する。
［使用材料］
セメント：表１に化学組成を示す市販品の普通ポルトランドセメントＡ〜Ｅの５種
高性能減水剤：ポリカルボン酸系高性能減水剤（商品名；ＮＴ−１０００Ｓ、（株）エヌエムビー製）
細骨材：海砂（密度：２．５６ｇ／ｃｍ３，粗粒率：２．２６）と石灰石砕砂（密度：２．６６ｇ／ｃｍ３，粗粒率：３．０４）の６：４（質量比）の混合物
粗骨材：砕石（密度：２．７２ｇ／ｃｍ３，最大寸法：１５ｍｍ）
カルシウムアルミネート類：１２ＣａＯ・７Ａｌ２Ｏ３組成の非晶質（以下略称「Ｃ１２Ａ７」という。）
アルミン酸ナトリウム１：Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が１．２１であるアルミン酸ナトリウム（以下略称「ＡＮ１」という。）
アルミン酸ナトリウム２：Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０．９５であるアルミン酸ナトリウム（以下略称「ＡＮ２」という。）
アルミン酸ナトリウム３：Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０．８１であるアルミン酸ナトリウム（以下略称「ＡＮ３」という。）
アルミン酸ナトリウム４：Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０．７２であるアルミン酸ナトリウム（以下略称「ＡＮ４」という。）
アルミン酸ナトリウム５：Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０．５５であるアルミン酸ナトリウム（以下略称「ＡＮ５」という。）
水和活性アルミナ類：非晶質アルミナ、平均粒子径；１５μｍ（堀場社製レーザー回折・散乱式粒子径測定装置（型番：ＬＡ−９００）で得た値）
石膏：無水石膏（ブレーン比表面積で６０００ｃｍ２／ｇ）
Hereinafter, the present invention will be described by way of examples.
[Materials used]
Cement: Commercially available ordinary Portland cements A to E, whose chemical compositions are shown in Table 1, five types of high-performance water reducing agents: polycarboxylic acid-based high-performance water reducing agents (trade name; NT-1000S, manufactured by NMB Corporation)
Fine aggregate: 6: 4 of sea sand (density: 2.56 g / cm 3 , coarse particle ratio: 2.26) and limestone crushed sand (density: 2.66 g / cm 3 , coarse particle ratio: 3.04) Mixture of coarse aggregate: crushed stone (density: 2.72 g / cm 3 , maximum dimension: 15 mm)
Calcium aluminate: amorphous of 12CaO · 7Al 2 O 3 composition (hereinafter referred to as “C 12 A 7 ”)
Sodium aluminate 1: sodium aluminate having a molar ratio of Na 2 O / Al 2 O 3 of 1.21 (hereinafter referred to as “AN1”).
Sodium aluminate 2: Na 2 O / Al 2 Sodium aluminate molar ratio of O 3 is 0.95 (hereinafter abbreviated as "AN2".)
Sodium aluminate 3: Sodium aluminate having a molar ratio of Na 2 O / Al 2 O 3 of 0.81 (hereinafter referred to as “AN3”)
Sodium aluminate 4: Sodium aluminate having a molar ratio of Na 2 O / Al 2 O 3 of 0.72 (hereinafter referred to as “AN4”)
Sodium aluminate having a molar ratio of sodium aluminate 5: Na 2 O / Al 2 O 3 of 0.55 (hereinafter referred to as “AN5”)
Hydrated activated aluminas: Amorphous alumina, average particle size: 15 μm (value obtained with a laser diffraction / scattering particle size measuring device (model number: LA-900) manufactured by Horiba)
Gypsum: anhydrous gypsum (6000 cm 2 / g in Blaine specific surface area)
［急結剤の製造］
上記カルシウムアルミネート類、アルミン酸ナトリウム１〜５、及び水和活性アルミナ類を表２に示す配合で、ヘンシェルミキサを用いて混合し、各種急結剤（急結剤Ａ〜Ｍ）を製造した。
[Manufacture of quick setting agent]
The calcium aluminates, sodium aluminates 1 to 5, and hydrated activated aluminas were blended using a Henschel mixer in the formulation shown in Table 2 to produce various quick setting agents (rapid setting agents A to M). .
［貫入抵抗試験による初期強度発現性評価］
内径１２ｃｍ、深さ１６ｃｍの円筒型ポリ容器にセメント５００ｇに石膏５０ｇ混合した粉体５５０gを投入し、水２４４ｇと高性能減水剤６ｇを加え、直径４ｃｍの撹拌羽付ハンドミキサーを用いて１，０００ｒｐｍの回転数で１分間混合しベースコンクリートに相当するセメントペーストを製造した後、急結剤４５ｇを添加して５秒間攪拌し、吹付材に相当する急結性セメントペーストを作製した。この作製した急結性セメントペーストに、先端が平面な直径２ｍｍの丸鋼からなる貫入針を１インチ貫入させたときの抵抗値、即ちプロクター貫入抵抗値を、急結剤の添加１０分後に測定した。このプロクター貫入抵抗値は、吹付材の初期強度特性を示すものである。表３及び表４に、用いたセメントの種類、用いた急結剤の種類、各急結性セメントペーストのプロクター貫入抵抗値の結果及びその評価を示した。評価基準は、材齢１０分後のプロクター貫入抵抗値が５０Ｎ／ｍｍ２以上である場合を良好とし、５０Ｎ／ｍｍ２未満を不良と評価した。プロクター貫入抵抗値が５０Ｎ／ｍｍ２以上であれば、圧縮強度で２Ｎ／ｍｍ２以上であることを意味する。また、ベースコンクリートに相当する各セメントペーストにおける、セメントと急結剤を除く混和材料に含まれる石膏の合計は、セメント１００重量部に対しＳＯ３換算で、セメントＡ、Ｂ、Ｃ及びＥを用いたものが８．２重量部、セメントＤを用いたものが８．３重量部であった。
[Evaluation of initial strength by penetration resistance test]
A cylindrical plastic container with an inner diameter of 12 cm and a depth of 16 cm is charged with 550 g of a powder obtained by mixing 50 g of gypsum with 500 g of cement, 244 g of water and 6 g of a high-performance water reducing agent are added. A cement paste corresponding to base concrete was produced by mixing at a rotational speed of 000 rpm for 1 minute, and then 45 g of rapid setting agent was added and stirred for 5 seconds to prepare a quick setting cement paste corresponding to spray material. A resistance value when a penetration needle made of a round steel with a diameter of 2 mm having a flat tip is penetrated into the prepared quick setting cement paste, that is, a proctor penetration resistance value, is measured 10 minutes after the addition of the quick setting agent. did. This proctor penetration resistance value indicates the initial strength characteristics of the spray material. Tables 3 and 4 show the types of cement used, the types of quick setting agents used, the results of the Procter penetration resistance value of each quick setting cement paste, and the evaluation thereof. As the evaluation criteria, the case where the proof penetration resistance value after 10 minutes of material age was 50 N / mm 2 or more was evaluated as good, and less than 50 N / mm 2 was evaluated as defective. If the Proctor penetration resistance value is 50 N / mm 2 or more, it means that the compressive strength is 2 N / mm 2 or more. Also, in each cement paste corresponding to base concrete, the total amount of gypsum contained in the admixture excluding cement and rapid setting agent is the same as that for cement A, B, C and E in terms of SO 3 with respect to 100 parts by weight of cement. The amount used was 8.2 parts by weight, and the amount using Cement D was 8.3 parts by weight.
セメントが異なっても、本発明の急結剤（急結剤Ａ〜Ｉ）を用いた試験Ｎｏ．１−１〜１−３３全ての材齢１０分におけるプロクター貫入抵抗値とも、５０Ｎ／ｍｍ２以上であった。特に、カルシウムアルミネート類とアルミン酸ナトリウムの合計１００重量部に対し、水和活性アルミナ類５〜２０重量部を含む急結剤（急結剤Ｇ〜Ｉ）を用いた試験Ｎｏ．１−１９〜１−３３は、プロクター貫入抵抗値が全て８０Ｎ／ｍｍ２以上、特に試験Ｎｏ．１−２４〜１−３３は、全て９０Ｎ／ｍｍ２以上と高い値であった。 Even if the cement is different, the test No. using the quick setting agent (rapid setting agents A to I) of the present invention was used. All the proctor penetration resistance values at 10 minutes of all the materials of 1-1 to 1-33 were 50 N / mm 2 or more. In particular, Test No. 1 using a quick setting agent (rapid setting agent G to I) containing 5 to 20 parts by weight of hydrated activated alumina with respect to 100 parts by weight of calcium aluminate and sodium aluminate in total. Nos. 1-19 to 1-33 all have a Proctor penetration resistance value of 80 N / mm 2 or more. 1-24 to 1-33 were all high values of 90 N / mm 2 or more.
それに比べ、アルミン酸ナトリウムを含まない急結剤（急結剤Ｊ）を用いたＮｏ．１−３４〜１−３８の材齢１０分におけるプロクター貫入抵抗値は、何れも５０Ｎ／ｍｍ２未満であった。また、Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が１．００以上であるアルミン酸ナトリウムを含む急結剤（急結剤Ｋ）を用いたＮｏ．１−３９〜１−４３の材齢１０分におけるプロクター貫入抵抗値は、５０Ｎ／ｍｍ２を大幅に越える値もあるが、１５Ｎ／ｍｍ２も見られ、セメントにより大きく異なった。Ｎａ２Ｏ／Ａｌ２Ｏ３のモル比が０.６５未満であるアルミン酸ナトリウムを含む急結剤（急結剤Ｍ）を用いたＮｏ．１−４５〜１−４９の材齢１０分におけるプロクター貫入抵抗値は、５０Ｎ／ｍｍ２を越える値もあるが、５０Ｎ／ｍｍ２未満のものも見られ、また、本発明の急結剤（急結剤Ａ〜Ｉ）を用いた場合に比べて小さい値であった。 In comparison, No. using a quick setting agent (quick setting agent J) containing no sodium aluminate. The Procter penetration resistance value at a material age of 10 minutes of 1-34 to 1-38 was less than 50 N / mm 2 . Further, using the quick-setting admixture (Kyuyuizai K) containing sodium aluminate molar ratio of Na 2 O / Al 2 O 3 is from 1.00 to No. Although the value of Procter penetration at 1-39 to 1-33 at a material age of 10 minutes was significantly higher than 50 N / mm 2 , 15 N / mm 2 was also observed and was greatly different depending on the cement. No. 1 using a quick setting agent (rapid setting agent M) containing sodium aluminate having a molar ratio of Na 2 O / Al 2 O 3 of less than 0.65. The Procter penetration resistance value at a material age of 1 to 45 to 1-49 at a material age of 10 minutes has a value exceeding 50 N / mm 2 , but a value less than 50 N / mm 2 is also observed, and the rapid setting agent of the present invention ( It was a small value compared with the case where quick setting agents A to I) were used.
［吹付材の引抜き方法による初期強度試験］
表５に示す配合のベースコンクリートを２００リットルのパン型ミキサーで練混ぜ製造した。製造したベースコンクリートを吹付け装置（商品名「アリバー２６０」）を使用して圧送し、急結剤を急結剤供給装置（日本プライブリコ（株）製，商品名「Ｑガン」）を使用して圧送し、Ｙ字管でベースコンクリートと急結剤とを合流混合させ吹付けコンクリート即ち吹付材を製造した。このときの急結剤の添加量は、セメント１００重量部に対して９．０重量部とした。吹付材の初期強度として、ＪＳＣＥ−Ｇ ５６１−１９９９「引抜き方法による吹付けコンクリートの初期強度試験方法」に従い材齢１０分の引抜き強度を測定し、この引抜き強度の値を４倍することで、圧縮強度を求めた。引抜き強度を換算することで求めた圧縮強度、使用したセメントの種類及び使用した急結剤の種類を、合わせて表６に示す。なお、各ベースコンクリートにおける、セメントと急結剤を除く混和材料に含まれる石膏の合計は、セメント１００重量部に対しＳＯ３換算で、セメントＡ、Ｂ、Ｃ及びＥを用いたものが７．０重量部、セメントＤを用いたものが７．１重量部であった。
[Initial strength test by drawing method of spray material]
The base concrete having the composition shown in Table 5 was kneaded with a 200 liter bread mixer. The manufactured base concrete is pumped using a spraying device (product name “Aliber 260”), and the quick setting agent is supplied using a quick setting agent supply device (product name “Q Gun” manufactured by Nihon Pribrico Co., Ltd.). The base concrete and the quick setting agent were merged and mixed with a Y-shaped tube to produce sprayed concrete, that is, a sprayed material. The addition amount of the quick setting agent at this time was 9.0 parts by weight with respect to 100 parts by weight of cement. As the initial strength of the spray material, according to JSCE-G 561-1999 "Initial strength test method of sprayed concrete by the drawing method", the pulling strength of the material age 10 minutes is measured, and the value of this pulling strength is quadrupled. The compressive strength was determined. Table 6 shows the compressive strength obtained by converting the pullout strength, the type of cement used, and the type of rapid setting agent used. In each base concrete, the total amount of gypsum contained in the admixture excluding cement and rapid setting agent is obtained by using cement A, B, C and E in terms of SO 3 with respect to 100 parts by weight of cement. The amount using 0 part by weight and cement D was 7.1 parts by weight.
本発明の実施例に相当する試験Ｎｏ．２−１〜２−１０全てにおいて、材齢１０分の圧縮強度が３．０Ｎ／ｍｍ２以上と高く且つセメントの品質変動に影響され難かった。 Test No. corresponding to the example of the present invention. In all of 2-1 to 2-10, the compressive strength at a material age of 10 minutes was as high as 3.0 N / mm 2 or more and was hardly affected by variations in cement quality.
本発明によれば、地山等に吹き付けた吹付材の初期強度がセメントの品質変動の影響を受け難く且つ高いので、トンネル等のコンクリートを吹き付ける建設工事に好適に用いることができる。吹き付けたコンクリートの初期強度が安定的に高いので、工期を短くする必要のある建設工事に、特に好適に用いることができる。 According to the present invention, since the initial strength of the spray material sprayed on a natural ground or the like is hardly affected by the quality variation of cement and is high, it can be suitably used for construction work for spraying concrete such as a tunnel. Since the initial strength of the sprayed concrete is stably high, it can be used particularly suitably for construction work that requires a shorter construction period.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004379420A JP5041503B2 (en) | 2004-12-28 | 2004-12-28 | Quick set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004379420A JP5041503B2 (en) | 2004-12-28 | 2004-12-28 | Quick set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006182617A JP2006182617A (en) | 2006-07-13 |
| JP5041503B2 true JP5041503B2 (en) | 2012-10-03 |
Family
ID=36736009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004379420A Expired - Fee Related JP5041503B2 (en) | 2004-12-28 | 2004-12-28 | Quick set |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5041503B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4982332B2 (en) * | 2007-11-06 | 2012-07-25 | 太平洋マテリアル株式会社 | Quick-hardening cement composition admixture, quick-hardening cement composition containing the same, quick-hardening cement kneaded material and spraying material |
| JP4999179B2 (en) * | 2007-12-28 | 2012-08-15 | 太平洋マテリアル株式会社 | Admixture for high-strength cement composition and high-strength cement composition using the same |
| JP5132599B2 (en) * | 2009-02-06 | 2013-01-30 | 電気化学工業株式会社 | Tunnel structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2613774B2 (en) * | 1987-10-20 | 1997-05-28 | 日本セメント株式会社 | Additive for shotcrete |
| JP3503915B2 (en) * | 1996-06-13 | 2004-03-08 | 電気化学工業株式会社 | Spraying material and spraying method using it |
| JP4020448B2 (en) * | 1996-08-21 | 2007-12-12 | 電気化学工業株式会社 | Spraying method |
| JP2003012356A (en) * | 2001-06-28 | 2003-01-15 | Taiheiyo Cement Corp | Quick-setting agent for spray concrete |
-
2004
- 2004-12-28 JP JP2004379420A patent/JP5041503B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006182617A (en) | 2006-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102294203B1 (en) | Quick-hardening mortar composition | |
| JP6258697B2 (en) | Fast-setting grout composition | |
| JP6392553B2 (en) | Method for producing hardened cement and hardened cement | |
| WO2022185659A1 (en) | Two-component quick-setting agent, spraying material, and spraying method | |
| JP5026928B2 (en) | Quick set and spray material | |
| JP6956468B2 (en) | Fast-curing grout composition | |
| JP4677824B2 (en) | Acid resistant grout composition | |
| JP2014122129A (en) | Hydraulic composition | |
| JP5888672B2 (en) | Cement-based injection material | |
| JP4982332B2 (en) | Quick-hardening cement composition admixture, quick-hardening cement composition containing the same, quick-hardening cement kneaded material and spraying material | |
| JP5072541B2 (en) | Admixture for cement composition with high coal ash powder content, and cement composition and spray material with high coal ash powder content containing the same | |
| JP5041503B2 (en) | Quick set | |
| JP6312298B2 (en) | Fast-hardening concrete and method for producing the same | |
| JP2007119263A (en) | Spray material and spraying method | |
| JP6985177B2 (en) | Hydraulic composition and concrete | |
| JP6258033B2 (en) | Method for producing fast-curing expanded cement kneaded material | |
| JP2020093940A (en) | Cement admixture, and concrete using the same | |
| JP6967819B2 (en) | Fast-curing grout composition | |
| JP4791892B2 (en) | Spray material | |
| JP2005060154A (en) | Quick-hardening material and quick-hardening cement composition | |
| JP2005008450A (en) | Method for producing cement slurry | |
| JP7355953B1 (en) | Liquid quick-setting agent, repair material, cured product | |
| JP2002321959A (en) | Cement concrete, quick-setting cement concrete, and preparation method | |
| JP7443150B2 (en) | Quick setting agent and spraying material | |
| JP2006008765A (en) | Soil fortifier and soil fortification method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20071225 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20100402 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20110405 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110531 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20111107 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20111221 |
|
| 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: 20120705 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120706 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5041503 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20150720 Year of fee payment: 3 |
|
| 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 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |