CN102964076B - Alkali and chloride-free enhancement type powder concrete setting accelerator - Google Patents
Alkali and chloride-free enhancement type powder concrete setting accelerator Download PDFInfo
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- CN102964076B CN102964076B CN201210359271.7A CN201210359271A CN102964076B CN 102964076 B CN102964076 B CN 102964076B CN 201210359271 A CN201210359271 A CN 201210359271A CN 102964076 B CN102964076 B CN 102964076B
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Abstract
Belonging to setting accelerators in the technical field of building materials, the invention particularly relates to an alkali and chloride-free enhancement type powder setting accelerator suitable for sprayed concrete, mortar, neat cement paste and the like. The alkali and chloride-free enhancement type powder setting accelerator is characterized by comprising the following components by weight: 1-3 parts of gypsum, 3-5 parts of aluminum sulfate, and 4-6 parts of a sulphoaluminate cement clinker. Its production method includes: calcining and dehydrating aluminum sulfate, then grinding it, and mixing the grinded aluminum sulfate with calcium sulfate and the sulphoaluminate cement clinker powder. The invention has obvious quick-setting and strength-enhancing effects, and has no damage to later strength. The concrete setting accelerator provided in the invention has the advantages of no toxicity, no corrosion, simple production process, low cost, as well as obvious economic and social benefits.
Description
Technical field
The present invention relates to the accelerating chemicals in building material technical field, be specially a kind of alkali-free chlorine-free enhancement type powder accelerator that is applicable to sprayed concrete, mortar, cement paste etc.
Background technology
Concrete admixture is building material product indispensable in Process of Engineering Construction, is called as concrete BSA.Sprayed concrete accelerating chemicals is very important a kind of product in concrete admixture.Shotcrete accelerator can be accelerated the rate of set of concrete mix, improves early strength, can effectively prevent tunnel or underground mine, side slope, buildings pit foundation generation avalanche, landslide, plays the effect of temporary supporting or permanent supporting.Therefore sprayed concrete must reach initial set and final set within the time requiring, and reaches the intensity of regulation.Reach above-mentioned requirements and just must in concrete, add accelerating chemicals.
The development of shotcrete accelerator has long history, has roughly experienced four-stage: the first stage is mainly the inorganics accelerating chemicals taking aluminum oxide clinker, soda ash or limestone as main raw material; Subordinate phase has to add the compound accelerating chemicals that the organic materials of specific function is made; Phase III is pulvis alkali-free quick-coagulant.Fourth stage is liquid accelerating agent.
First stage: pure inorganics class accelerating chemicals.This class accelerating chemicals is of a great variety both at home and abroad, external more famous You Qian West Germany Tricosal and Isecret, the P-500 of Japan, some products of the Sigunit of Sweden and SIKA and USSR (Union of Soviet Socialist Republics).China's this series products of most of manufacturer production, majority is taking aluminum oxide clinker as main component, adds certain proportion soda ash to be prepared from.Principal item has Red Star one type, 711 types, Yao mountain type, Yangquan one type, 782 types, J85 type etc.This accelerating chemicals is alkalescence and late strength of concrete is reduced, and within 28 days, intensity retention is only 60 ~ 80%.
Subordinate phase: the compound accelerating chemicals of the compositions such as the thickening material that contains macromolecular material.Japan developed acrylic amine-sodium acrylate copolymer as shotcrete dust inhibitor; It is main sprayed concrete additive by trolamine, partly-hydrolysed polyacrylamide-vinylformic acid-acrylonitrile terpolymer that front West Germany reported a kind of accelerating chemicals; Architectural Inst., Ministry of Metallurgical Industry developed 8604 type additives, and the two all makes springback capacity decrease, and mixed use but all need to reach 8% 782 type accelerating chemicalss with volume, caused late strength of concrete reduction larger.
Phase III: pulvis alkali-free quick-coagulant.This accelerating chemicals is taking aluminium hydroxide, Tai-Ace S 150, polynite, kaolin or its composition as main raw material, and this accelerating chemicals alkalinity decreases.But often can not meet the requirement of construction work to early age strength of concrete, and spray time dust larger.
Fourth stage: liquid accelerator.Liquid accelerator is the improvement that powder accelerator is carried out, and the use of liquid accelerator effectively reduces concrete resilience.In engineering, conventional liquid accelerator comprises taking water glass, sodium aluminate as main alkaline liquid accelerating agent and low alkali (or alkali-free) liquid accelerator at present.Wherein the alkalinity of alkaline liquid accelerating agent is high, easily workmen's health is damaged.Strong basicity accelerating chemicals makes cement form loose aluminate hydrate structure at the aquation initial stage simultaneously, has increased the possibility that concrete alkali aggregate reaction occurs, and concrete later strength and endurance quality are had to obvious weakening effect.In addition, the liquid accelerator price of alkali-free is generally higher, and exists long-term placement to occur layering, stable poor problem.
It seems from the application present situation of accelerating chemicals, along with Economic development and technical progress, the use range of accelerating chemicals is more and more wider, and consumption is increasing.According to statistics, within 2007, China's accelerating chemicals output is about 35.4 ten thousand tons, and 2009 annual production reach 100.71 ten thousand tons, and wherein powder accounts for 74.32%, and liquid accounts for 25.68%.And the ratio of liquid accelerator is increasing year by year, but because liquid accelerator is at the aspect such as price and performance, the accelerating chemicals using in engineering is at present still in the majority with the accelerating chemicals of powdery.
Summary of the invention
No matter the object of the invention is for the deficiencies in the prior art, a kind of Hardenfast of alkali-free chlorine-free is provided, in promoting cement setting, can not reduce concrete intensity, be early strength or later strength.
A kind of alkali-free chlorine-free enhancement type powder accelerator, is characterized in that being grouped into by the one-tenth of following weight ratio:
1 ~ 3 part, gypsum
3 ~ 5 parts, Tai-Ace S 150
4 ~ 6 parts of sulphoaluminate cement clinkers.
Preferred version one, is grouped into by the one-tenth of following weight ratio:
3 parts, gypsum
4.5 parts, Tai-Ace S 150
5 parts of sulphoaluminate cement clinkers.
Preferred version two, is grouped into by the one-tenth of following weight ratio:
2 parts, gypsum
4.5 parts, Tai-Ace S 150
5 parts of sulphoaluminate cement clinkers.
Said Tai-Ace S 150 is industrial aluminum sulphate, Al
2o
3content is greater than 15%, presses white sulfate of alumina calculated weight containing the product of crystal water.In said sulphoaluminate cement clinker, the content of main component CaO is 60 ~ 70%, SiO
2content be 4 ~ 8%, Al
2o
3content be 15 ~ 18%, SO
3content be 7 ~ 8%.Said gypsum is anhydrous calciumsulphate, can be also that calcium sulphate hemihydrate or terra alba calcined dehydration form.
Preparation method of the present invention is: Tai-Ace S 150 is fired to anhydrous at 300 DEG C, grinds, and fineness is passed through with 220 object standard sieves, and screen over-size is less than 5%.Sulphoaluminate cement clinker grinding fineness passes through with 250 object standard sieves, and screen over-size is less than 5%.Tai-Ace S 150, sulphoaluminate cement clinker and dehydrated gyp-after calcining grinding are mixed.
Alkali-free chlorine-free enhancement type powder accelerator of the present invention can produce good effect.Can make cement initial set in 3 minutes, final set in 10 minutes, when early strength develops rapidly, later strength does not reduce.
Alkali-free chlorine-free enhancement type powder accelerator of the present invention is nontoxic, tasteless, non-stimulated, does not injure human body, for the reinforcing bar non-corroding effect of inside concrete.
Alkali-free chlorine-free enhancement type powder accelerator of the present invention, preparation method is simple, and cost is low, low to plant and instrument requirement, is applicable to mass industrialized production.
Embodiment
Embodiment 1
Tai-Ace S 150 is fired to anhydrous at 300 DEG C, grind, and fineness is passed through with 220 object standard sieves, and screen over-size is less than 5%.Sulphoaluminate cement clinker 1 grinding fineness passes through with 250 object standard sieves, and screen over-size is less than 5%, and the moiety of sulphoaluminate cement clinker 1 is as shown in table 1.Tai-Ace S 150, sulphoaluminate cement clinker and dehydrated gyp-after calcining grinding are mixed by weight 4.5:5:3.
Embodiment 2
Tai-Ace S 150 is fired to anhydrous at 290 DEG C, grind, and fineness is passed through with 220 object standard sieves, and screen over-size is less than 5%.Sulphoaluminate cement clinker 2 grinding finenesses pass through with 250 object standard sieves, and screen over-size is less than 5%, and the moiety of sulphoaluminate cement clinker 2 is as shown in table 1.Tai-Ace S 150, sulphoaluminate cement clinker and dehydrated gyp-after calcining grinding are mixed by weight 4.5:5:2.
Embodiment 3
Tai-Ace S 150 is fired to anhydrous at 310 DEG C, grind, and fineness is passed through with 220 object standard sieves, and screen over-size is less than 5%.Sulphoaluminate cement clinker 3 grinding finenesses pass through with 250 object standard sieves, and screen over-size is less than 5%, and the moiety of sulphoaluminate cement clinker 3 is as shown in table 1.Tai-Ace S 150, sulphoaluminate cement clinker and dehydrated gyp-after calcining grinding are mixed by weight 4.5:5:2.5.
The property indices of accelerating chemicals of the present invention all meets the regulation of national building material industry standard JC477-2005 " sprayed concrete accelerating chemicals ".By standard, the accelerating chemicals in Preparation Example 1,2 and 3 is added in sand-cement slurry sample to account for 12.5% and 11.5% and 12% of cement weight respectively, test time of coagulation and intensity, contrast with the blank cement of not mixing accelerating chemicals simultaneously.Test result is in table 2.
Table 1 sulphoaluminate cement clinker moiety table
Table 2 accelerating chemicals test result
Claims (3)
1. an alkali-free chlorine-free enhancement type powder accelerator, is characterized in that being grouped into by the one-tenth of following weight ratio:
1～3 part, gypsum
3～5 parts, Tai-Ace S 150
4～6 parts of sulphoaluminate cement clinkers;
In described sulphoaluminate cement clinker, the content of main component CaO is 60～70%, SiO
2content be 4～8%, Al
2o
3content be 15～18%, SO
3content be 7～8%.
2. accelerating chemicals according to claim 1, is grouped into by the one-tenth of following weight ratio:
3 parts, gypsum
4.5 parts, Tai-Ace S 150
5 parts of sulphoaluminate cement clinkers.
3. accelerating chemicals according to claim 1, is grouped into by the one-tenth of following weight ratio:
2 parts, gypsum
4.5 parts, Tai-Ace S 150
5 parts of sulphoaluminate cement clinkers.
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| CN201210359271.7A CN102964076B (en) | 2012-09-24 | 2012-09-24 | Alkali and chloride-free enhancement type powder concrete setting accelerator |
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| CN201210359271.7A CN102964076B (en) | 2012-09-24 | 2012-09-24 | Alkali and chloride-free enhancement type powder concrete setting accelerator |
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| CN102964076A CN102964076A (en) | 2013-03-13 |
| CN102964076B true CN102964076B (en) | 2014-06-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107417152A (en) * | 2017-05-25 | 2017-12-01 | 赵前方 | A kind of accelerator |
| CN112321187A (en) * | 2020-10-23 | 2021-02-05 | 北京中建国信科技开发中心 | Mineral additive for shotcrete and preparation method and application thereof |
| CN113185172A (en) * | 2021-04-20 | 2021-07-30 | 浙江交工集团股份有限公司 | Bi-component accelerator, wet-spraying concrete and preparation method thereof |
| CN113816639A (en) * | 2021-09-07 | 2021-12-21 | 宿州市健生矿山设备有限公司 | Sulphoaluminate cement-based accelerator and preparation method and application thereof |
| CN114920485B (en) * | 2022-07-04 | 2023-04-07 | 中国水利水电第七工程局有限公司 | Slow-release additive for ultrahigh early strength sprayed concrete and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1110260A (en) * | 1994-04-15 | 1995-10-18 | 湖北省襄樊市建筑复合材料总厂 | Compound additive of special and general cements and its application method |
| CN1166465A (en) * | 1997-01-08 | 1997-12-03 | 中国建筑材料科学研究院水泥所阳泉联营特种水泥厂 | High-moisture quick-setting mono-slurry |
| CN101012112A (en) * | 2007-01-27 | 2007-08-08 | 葫芦岛市辽西混凝土外加剂有限公司 | High-strength concrete accelerator |
| CN102660952A (en) * | 2012-05-30 | 2012-09-12 | 湖南宏禹水利水电岩土工程有限公司 | Controllable clay paste slurry grouting technique |
-
2012
- 2012-09-24 CN CN201210359271.7A patent/CN102964076B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1110260A (en) * | 1994-04-15 | 1995-10-18 | 湖北省襄樊市建筑复合材料总厂 | Compound additive of special and general cements and its application method |
| CN1166465A (en) * | 1997-01-08 | 1997-12-03 | 中国建筑材料科学研究院水泥所阳泉联营特种水泥厂 | High-moisture quick-setting mono-slurry |
| CN101012112A (en) * | 2007-01-27 | 2007-08-08 | 葫芦岛市辽西混凝土外加剂有限公司 | High-strength concrete accelerator |
| CN102660952A (en) * | 2012-05-30 | 2012-09-12 | 湖南宏禹水利水电岩土工程有限公司 | Controllable clay paste slurry grouting technique |
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Effective date of registration: 20210420 Address after: 831100 No.12, Changxiang Road, Changji high tech Industrial Development Zone, Changji Hui Autonomous Prefecture, Xinjiang Uygur Autonomous Region Patentee after: Xinjiang Ronggao Hongjun New Material Technology Co.,Ltd. Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Patentee before: Beijing University of Technology |
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