JP2769181B2 - Rapid hardening cement composition - Google Patents
Rapid hardening cement compositionInfo
- Publication number
- JP2769181B2 JP2769181B2 JP1040204A JP4020489A JP2769181B2 JP 2769181 B2 JP2769181 B2 JP 2769181B2 JP 1040204 A JP1040204 A JP 1040204A JP 4020489 A JP4020489 A JP 4020489A JP 2769181 B2 JP2769181 B2 JP 2769181B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- caf
- cement composition
- strength
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、ポルトランドセメントの初期強度を高めた
速硬セメント組成物に関する。Description: TECHNICAL FIELD The present invention relates to a quick-setting cement composition in which the initial strength of Portland cement is increased.
（従来の技術と発明が解決しようとする課題） ポルトランドセメントは、現在、代表的な水硬性セメ
ントとして広く使用され、一般的には、凝結が開始し、
流動性が失なわれるまで７時間程度あり、作業性が良好
で、面積の広い施工や大量打設が可能であり、その強度
は最終的には相当大きいものである。しかし、初期強度
が低く、例えば、普通ポルトランドセメントを用いてコ
ンクリートの打込み成形を行つた場合、気温20℃程度で
実用強度に達するまでに14〜28日間と長い時間が必要
で、しかも、気温が低くなるほどそれは顕著であり、お
のずと、その適用範囲に制限があつた。(Problems to be Solved by the Prior Art and the Invention) Portland cement is currently widely used as a representative hydraulic cement, and generally starts to set,
It takes about 7 hours until the fluidity is lost, the workability is good, a large-area construction and mass casting are possible, and the strength is finally considerably large. However, the initial strength is low, for example, when concrete is cast using ordinary Portland cement, it takes a long time of 14 to 28 days to reach practical strength at a temperature of about 20 ° C, and the temperature is high. The lower it was, the more noticeable it was, naturally, limiting its scope.
最近の建築・土木分野では、年々施工が大型化する一
方で、型枠の使用サイクルの短縮化、あるいは、工期の
合理化などのため、作業性を損なうことなく、強度発現
の早いセメントが要望されていた。In the recent construction and civil engineering fields, while construction is increasing year by year, cement is required to have high strength without a loss of workability in order to shorten the use cycle of formwork or rationalize the construction period. I was
そのため、上記ポルトランドセメントの強度促進方法
として、カルシウムハロアルミネートと石膏からなる混
和材をセメントに添加し強度を促進する方法は知られて
いるが、これは、セメントの凝集時間を早めて初期強度
を高める方法であり、作業性が悪るくなる課題があつた
（特公昭54−25049号公報、特公昭55−11632号公報）。Therefore, as a method of promoting the strength of the above Portland cement, a method of adding an admixture consisting of calcium haloaluminate and gypsum to the cement to promote the strength is known. And there is a problem that the workability is deteriorated (JP-B-54-25049, JP-B-55-11632).
本発明者らは、特定の材料の特定割合使用することに
よつて、その凝結時間を著しく早めることなく、初期強
度を高め、これによつて大量打設が可能で、かつ、早期
脱型や工事の合理化をはかることができる知見を得て本
発明を完成するに至つた。By using a specific ratio of a specific material, the present inventors can increase the initial strength without significantly shortening the setting time, thereby enabling mass casting, early demolding and The present invention has been completed by obtaining knowledge that can rationalize the construction.
（課題を解決するための手段） 即ち、本発明は、ポルトランドセメント60〜92重量
部、平均粒径５〜10μｍのフロロアウイン３〜25重量
部、及び平均粒径２〜７μｍの無水石膏５〜30重量部か
らなる混合物100重量部と、凝結調整剤0.05〜３重量部
を主成分とする速硬セメント組成物である。(Means for Solving the Problems) That is, the present invention relates to 60 to 92 parts by weight of Portland cement, 3 to 25 parts by weight of fluorauin having an average particle size of 5 to 10 μm, and 5 to 30 parts of anhydrous gypsum having an average particle size of 2 to 7 μm. It is a quick-setting cement composition containing 100 parts by weight of a mixture consisting of parts by weight and 0.05 to 3 parts by weight of a setting modifier.
以下、詳しく本発明を説明する。 Hereinafter, the present invention will be described in detail.
本発明におけるポルトランドセメント（以下ポセとい
う）とは、普通・早強・超早強などの各種ポセや、それ
にシリカなどを混合した各種混合セメントである。The portland cement (hereinafter, referred to as “pose”) in the present invention refers to various kinds of ceases such as ordinary, fast and super fast, and various mixed cements in which silica and the like are mixed.
次に、フロロアウイン（以下C3A3CaF2という）とは、
3CaO・3Al2O3・CaF2と示されるものである。C3A3CaF
2は、石灰質原料、アルミ質原料及びフッ素化合物を、
生成する鉱物が3CaO・3Al2O3・CaF2になるように配合し
たものをキルンで焼成したり、電気炉で溶融して得られ
る。また、電気炉で溶融した溶融物を水や空気などで吹
きとばすなど、急冷することにより、非晶質のC3A3CaF2
が得られ、同様に用いることができる。C3A3CaF2の粒末
度は、平均粒径が５〜10μｍが好ましい。５μｍ未満で
は凝結時間が早くなり、それほど強度発現性が向上しな
い。また、15μｍを越えると初期強度発現性が悪るくな
る傾向がある。通常は44μｍふるい残分が５重量％以下
のものを使用することができる。Next, Fluoroauin (hereinafter referred to as C 3 A 3 CaF 2 )
It is indicated as 3CaO · 3Al 2 O 3 · CaF 2. C 3 A 3 CaF
2 , calcareous raw materials, aluminum raw materials and fluorine compounds,
Those minerals produced were blended so that the 3CaO · 3Al 2 O 3 · CaF 2 or firing kiln, obtained by melt in an electric furnace. In addition, amorphous C 3 A 3 CaF 2 is obtained by rapid cooling, such as by blowing the molten material melted in an electric furnace with water or air.
And can be used similarly. The average particle diameter of C 3 A 3 CaF 2 is preferably 5 to 10 μm. If it is less than 5 μm, the setting time is short, and the strength development is not so improved. On the other hand, if it exceeds 15 μm, the initial strength expression tends to be poor. Usually, those having a sieve residue of 44 μm of 5% by weight or less can be used.
無水石膏（以下Ｃという）とはＸ線回折パターンが
II型−CaSO4の形態を示すものであり、工業的に含まれ
る不純物には制約を受けない。Anhydrite (hereinafter referred to as C) has an X-ray diffraction pattern
Type II—shows the form of CaSO 4 , and there is no restriction on impurities contained industrially.
Ｃの粒末度は、平均粒径が２〜７μｍが好ましい。
２μｍ未満では粉砕効率が悪るくなり経済的でない。７
μｍを越えると強度発現が悪るくなる。The average particle size of C is preferably 2 to 7 μm.
If it is less than 2 μm, the pulverization efficiency becomes poor and it is not economical. 7
If it exceeds μm, the strength expression becomes poor.
これら、ポセとC3A3CaF2及びＣの割合は、ポセ60〜
92重量部とC3A3CaF23〜25重量部及びＣ５〜30重量部
であり、好ましくは、ポセ70〜85重量部とC3A3CaF25〜2
0重量部、及びＣ８〜20重量部である。C3A3CaF2を３
〜25重量部に限定した理由は、３重量部未満では初期強
度が得られにくく、25重量部を越えると膨脹性になり好
ましくない。また、Ｃが５重量未満では初期強度が得
られず、30重量部を越えると膨張性が現われて好ましく
ない。また、C3A3CaF2とＣの比率はC3A3CaF21重量部
に対してＣを0.5〜３重量部が好ましく、0.8〜２重量
部が更に好ましい。0.5重量部未満では強度発現が悪る
くなる傾向があり、３重量部を越えると膨張材になる傾
向があり、好ましくない。The ratio of these to C 3 A 3 CaF 2 and C is
92 parts by weight, 3 to 25 parts by weight of C 3 A 3 CaF 2 and 5 to 30 parts by weight of C 3 A 3 CaF 2 , preferably 70 to 85 parts by weight of Poses and 5 to 2 parts by weight of C 3 A 3 CaF 25
0 parts by weight and C8 to 20 parts by weight. 3 C 3 A 3 CaF 2
The reason for limiting to 25 parts by weight is that if it is less than 3 parts by weight, it is difficult to obtain the initial strength, and if it exceeds 25 parts by weight, it becomes unsatisfactory because it expands. If C is less than 5 parts by weight, the initial strength cannot be obtained, and if it exceeds 30 parts by weight, expandability appears, which is not preferable. Further, preferably 0.5 to 3 parts by weight of C with respect to C 3 A 3 is the ratio of CaF 2 and C C 3 A 3 CaF 2 1 part by weight, 0.8 to 2 parts by weight is more preferable. If the amount is less than 0.5 part by weight, the strength tends to deteriorate, and if it exceeds 3 parts by weight, it tends to become an expanding material, which is not preferable.
次に、凝結調整剤（以下調整剤という）とは、凝結遅
延剤（以下遅延剤という）又はそれと炭酸アルカリから
なるものである。遅延剤とは、クエン酸、酒石酸及びグ
ルコン酸又はこれらの塩であり、塩としてはナトリム塩
やカリウム塩がある。これらを一種又は二種以上用いる
ことができる。Next, the setting modifier (hereinafter referred to as a "controlling agent") is a setting retarder (hereinafter referred to as a "retarding agent") or a mixture thereof and an alkali carbonate. The retarder is citric acid, tartaric acid, gluconic acid or a salt thereof, and examples of the salt include a sodium salt and a potassium salt. One or two or more of these can be used.
炭酸アルカリとは、炭酸ナトリウムや炭酸カリウムな
どである。The alkali carbonate includes sodium carbonate, potassium carbonate, and the like.
調整剤として、遅延剤と炭酸アルカリを併用すること
は、作業性や強度発現性から好ましい。調整剤の使用量
は、その種類によつて変化し、一義的には決定できない
が、ポセ、C3A3CaF2及びＣの混合物（以下粉体とい
う）100重量部に対して0.1〜３重量部が好ましい。特に
クエン酸又はその塩を使用する場合は0.2〜1.0重量部が
好ましく、酒石酸又はその塩を使用する場合は、0.1〜
0.5重量部が好ましく、グルコン酸又はその塩を使用す
る場合は0.05〜0.2重量部が好ましい。また、炭酸アル
カリの使用量は、通常、0.2〜２重量部が好ましい。It is preferable to use a retarder and an alkali carbonate together as a regulator from the viewpoint of workability and strength. The amount of the modifier is to by connexion change in its kind, can not be determined unambiguously, Pose, C 3 A 3 mixture of CaF 2 and C (hereinafter referred to as powder) per 100 parts by weight of 0.1 to 3 Parts by weight are preferred. In particular, when citric acid or a salt thereof is used, 0.2 to 1.0 part by weight is preferable.When tartaric acid or a salt thereof is used, 0.1 to 1.0 part by weight is used.
0.5 part by weight is preferable, and when gluconic acid or a salt thereof is used, 0.05 to 0.2 part by weight is preferable. In addition, the amount of the alkali carbonate used is usually preferably 0.2 to 2 parts by weight.
以上、本発明の速硬セメント組成物は、従来と同じ
く、水と混練りして、ペースト、モルタル及びコンクリ
ートとして用いることができ、ポセと同等な作業性を有
し、かつ、初期強度が高いのが特徴であり、土木、建築
及び二次製品分野で広く用いることができる。As described above, the rapid-hardening cement composition of the present invention can be used as a paste, mortar and concrete by kneading with water, as in the past, has the same workability as Posé, and has a high initial strength. It can be widely used in the fields of civil engineering, architecture and secondary products.
（実施例） 以下、実施例によりさらに詳しく説明する。(Example) Hereinafter, an example will be described in more detail.
実施例−１ 生石灰30.5重量部、ボーキ55.5重量部、螢石14重量部
を電気抵抗炉で完全溶融（温度1,520℃）した後、空気
で吹きとばし急冷した後、粉砕し、第１表に示すC3A3Ca
F2を得た。次に第２表に示す割合で混合した混合物100
重量部に対して標準砂200重量部と水45重量部を混合し
て得られたモルタルの凝結時間と強度発現を測定した。
その結果を第２表に併記する。Example 1 30.5 parts by weight of quicklime, 55.5 parts by weight of bokeh, and 14 parts by weight of fluorite were completely melted (temperature: 1,520 ° C.) in an electric resistance furnace, blown by air, quenched, pulverized, and shown in Table 1. C 3 A 3 Ca
To obtain a F 2. Next, the mixture 100 mixed in the ratio shown in Table 2
The setting time and strength development of a mortar obtained by mixing 200 parts by weight of standard sand and 45 parts by weight of water with respect to parts by weight were measured.
The results are shown in Table 2.
（使用材料） 実施例２ 実施例１、実験No1−９の配合を用いて、調整剤を第
３表のように変化させたこと以外は、実施例１と同様に
行つた。結果を第３表に併記する。(Material used) Example 2 Example 1 was repeated in the same manner as in Example 1 except that the modifier was changed as shown in Table 3 using the formulation of Experiment No. 1-9. The results are shown in Table 3.
（使用材料） 調整剤−c:酒石酸、和光純薬、１級試薬 −d:グルコン酸ナトリウム、和光純薬、１級試
薬 −e:炭酸カリウム、和光純薬、１級試薬 （発明の効果） 本発明の速硬セメント組成物によると次の効果が得ら
れる。(Materials used) Regulator -c: tartaric acid, Wako Pure Chemical, primary reagent -d: Sodium gluconate, Wako Pure Chemical, primary reagent -e: Potassium carbonate, Wako Pure Chemical, primary reagent (Effects of the Invention) The following effects are obtained according to the quick-setting cement composition of the present invention.
１）作業時間が長く施工性が良く大量打設が可能にな
る。1) The work time is long, the workability is good, and a large amount of casting can be performed.
２）初期強度が高いため、早期脱型、工期の短縮が可能
になる。2) Since the initial strength is high, it is possible to quickly remove the mold and shorten the construction period.
３）ポルトランドセメントが使用できるので安価であ
る。3) Inexpensive because Portland cement can be used.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 28/02,22/14,24/06──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) C04B 28 / 02,22 / 14,24 / 06
Claims (1)
粒径５〜10μｍのフロロアウイン３〜25重量部、及び平
均粒径２〜７μｍの無水石膏５〜30重量部からなる混合
物100重量部と、凝結調整剤0.05〜３重量部を主成分と
する速硬セメント組成物。(1) 100 parts by weight of a mixture comprising 60 to 92 parts by weight of Portland cement, 3 to 25 parts by weight of fluorauin having an average particle size of 5 to 10 μm, and 5 to 30 parts by weight of anhydrous gypsum having an average particle size of 2 to 7 μm; A fast-setting cement composition containing 0.05 to 3 parts by weight of a setting modifier as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1040204A JP2769181B2 (en) | 1989-02-22 | 1989-02-22 | Rapid hardening cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1040204A JP2769181B2 (en) | 1989-02-22 | 1989-02-22 | Rapid hardening cement composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02221143A JPH02221143A (en) | 1990-09-04 |
| JP2769181B2 true JP2769181B2 (en) | 1998-06-25 |
Family
ID=12574251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1040204A Expired - Fee Related JP2769181B2 (en) | 1989-02-22 | 1989-02-22 | Rapid hardening cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2769181B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120328982B (en) * | 2025-06-20 | 2025-08-19 | 西安理工大学 | A triggered precipitation type concrete crack repair agent and its preparation method and application |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5425049A (en) * | 1977-07-23 | 1979-02-24 | Akira Ogawara | Hanging band |
-
1989
- 1989-02-22 JP JP1040204A patent/JP2769181B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02221143A (en) | 1990-09-04 |
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