CN101182000A - Hydrated calcium silicate as well as preparation method thereof and concrete anti-freeze agent containing the same - Google Patents
Hydrated calcium silicate as well as preparation method thereof and concrete anti-freeze agent containing the same Download PDFInfo
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- CN101182000A CN101182000A CNA2007101446467A CN200710144646A CN101182000A CN 101182000 A CN101182000 A CN 101182000A CN A2007101446467 A CNA2007101446467 A CN A2007101446467A CN 200710144646 A CN200710144646 A CN 200710144646A CN 101182000 A CN101182000 A CN 101182000A
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- calcium silicate
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Abstract
The invention relates to a calcium silicate hydrate and a preparation method thereof and concrete antifreezing agent containing the calcium silicate hydrate, which pertains to the field of construction materials and manufacturing method thereof. The invention solves the problems of antifreezing agent in existing market of poor durability of concrete, steel-bar corrosion, alkaline aggregate reaction, etc., caused by large quantity of salt content in the concrete antifreezing agent. The calcium silicate hydrate is made from calcareous material, siliceous material and water. The preparation method comprises the steps that: the calcareous material and the siliceous material are evenly mixed and grinded and added with water to prepare pasty material, which goes through heat reaction at 1 to 3atm for 2 to 5h. The concrete antifreezing agent containing the calcium silicate hydrate is made of the calcium silicate hydrate, antifreezing components, water reducing components, air entraining components and fly ash. The calcium silicate hydrate uses seed crystal hydration to improve the hydration of the concrete, which leads set cement to be more impact and the long-term property of the concrete not to be reduced. The antifreezing agent of the invention does not contain chloride salts, reduces the damage effect of the steel-bar corrosion caused by mixing the chloride salts with the concrete when in construction during winter period and greatly reduces the salt content in the concrete.
Description
Technical field
The invention belongs to the field of material of construction and manufacture method thereof, be specifically related to a kind of hydrated calcium silicate and preparation method thereof and the concrete antifreezer that contains the aquation Calucium Silicate powder.
Background technology
Concrete is present main building structural materials, and it consists of: cement+sand+stone+mineral admixture.In this external winter construction in order to make cement aquation under subzero temperature must add concrete antifreezer.The effect of frostproofer makes cement carry out hydration reaction in order to produce liquid water under subzero temperature on the one hand, is on the other hand must have accelerating component to promote that water mudrock structure forms as early as possible.The formation of early stage structure makes liquid water enter hole reduction freezing point, helps the further growth of water mudrock structure after structure forms simultaneously.Thereby two main ingredients of concrete antifreezer indispensability are antifreezing component and accelerating component, also have bleed component and diminishing component in addition.Accelerating component and antifreezing component consumption are big and be salt, and the introducing meeting of salt produces a series of influences to concrete durability, as cause steel bar corrosion, alkali etc.These influences directly concern the concrete life-span, in order to improve concrete work-ing life, prolong the concrete military service phase, industry of concrete construction at present and the usage quantity of building salt in all strict restriction concrete of competent authorities.But the three northern areas of China in China, subzero temperature construct are very general.Frostproofer is necessary concrete component in the subzero temperature construct process.Present frostproofer basic comprising is two big series, the one, and the anti-freeze type frostproofer, another is the early-strength type frostproofer, no matter which kind of frostproofer is all to mix the salt component.Salt comprises NaCl, Na
2SO
4, NaNO
2, Ca (NO
2)
2Deng, these salts all can produce detrimentally affect to concrete performance especially long durability, especially the frostproofer that contains villaumite more can bring adverse influence to concrete, mixing villaumite when winter construction in because of concrete destroys steel bar corrosion, and frostproofer in the market mostly with villaumite as accelerating component, this can produce huge undesirable action to the concrete life-span, how to reduce salts contg in the concrete particularly chloride content be important topic in the current concrete antifreezer research.
Summary of the invention
The objective of the invention is to solve because salts contg is big in the concrete antifreezer, and the concrete durability that causes is poor, the problem of steel bar corrosion and alkali, a kind of hydrated calcium silicate and preparation method thereof and the concrete antifreezer that contains the aquation Calucium Silicate powder are provided, frostproofer of the present invention is to replace the salt accelerating component with hydrated calcium silicate as the accelerating component of hydrated cementitious, in the frostproofer in the more present frostproofer of salts contg salts contg decline to a great extent.
Hydrated calcium silicate among the present invention is to be made by calcareous material, siliceous material and water, and wherein the weight ratio of calcareous material and siliceous material is 1.2～1.5: 1, and the weight of water is 3～4: 1 with the gross weight ratio of calcareous material and siliceous material.Described siliceous material is diatomite, opal or slag, and described calcareous material is unslaked lime or white lime.The preparation method of hydrated calcium silicate is as follows: earlier 1.2～1.5: 1 mixed is even by weight with calcareous material and siliceous material, levigate then 3～10% the fineness that tails over to 45 μ, the water furnishing pulpous state material and the mixing that add 3～4 times of mixture total weight amounts again, thermal response 2～5h under the condition of 1～3atm promptly obtains hydrated calcium silicate.
The concrete antifreezer that contains the aquation Calucium Silicate powder of the present invention is to be made up of 40～50 parts hydrated calcium silicate, 40～50 parts antifreezing component, 2.5～5 parts diminishing component, 0.1 part bleed component and 5～8 parts flyash by weight, and described antifreezing component is NaNO
2Or Ca (NO
2)
2, described diminishing component is naphthalene sulfonic acid formaldehyde polymer, trimeric cyanamide formal condenses or maleic anhydride-methacrylic acid-diluted acid sulfonate, described bleed component is a triterpenoid saponin.
The present invention has following beneficial effect:
1. production process of the present invention is simple, and the starting material cheapness helps suitability for industrialized production.
2. the present invention can make the salts contg in the concrete reduce significantly, and then can make because the salt existence causes the phenomenon of concrete deterioration to be solved.
When the volume of hydrated calcium silicate of the present invention be cement amount 5% the time, the concrete strength of constructing 3 days can improve 20%～30%, 28 days intensity can improve 15%～20%.When using the synthetic hydrated calcium silicate to make less salt type frostproofer as accelerating component, volume be in the concrete cement amount 10%, under-15 ℃ of conditions, concrete-7+28 days intensity can reach mark and support 28 days concrete strengths, product performance can reach the GB475 standard-required, and salts contg reduction by 40% in the salts contg frostproofer more commonly used in the concrete.
4. do not contain villaumite in the concrete antifreezer that contains the aquation Calucium Silicate powder of the present invention, when having reduced the concrete winter construction because of mixing the steel bar corrosion destruction that villaumite brings.
5. the principle of the concrete antifreezer that contains the aquation Calucium Silicate powder of the present invention being mixed promotion aquation in the concrete is the crystal seed aquation, and its effect can make the structure of cement stone more closely knit, and structure is more reasonable, and concrete long-term behaviour can not decay.
Embodiment
Embodiment one: the hydrated calcium silicate in the present embodiment is to be made by calcareous material, siliceous material and water, wherein the weight ratio of calcareous material and siliceous material is 1.2～1.5: 1, the weight of water is 3～4: 1 with the gross weight ratio of calcareous material and siliceous material, siliceous material is diatomite, opal or slag, and calcareous material is unslaked lime or white lime.
Embodiment two: present embodiment and embodiment one are different is that the weight ratio of calcareous material and siliceous material is 1.2～1.4: 1, and other is identical with embodiment one.
Embodiment three: present embodiment and embodiment one are different is that the weight ratio of calcareous material and siliceous material is 1.2: 1, and other is identical with embodiment one.
Embodiment four: hydrated calcium silicate preparation method's step is as follows in the present embodiment: earlier 1.2～1.5: 1 mixed is even by weight with calcareous material and siliceous material, levigate then 3～10% the fineness that tails over to 45 μ, the water furnishing pulpous state material and the mixing that add 3～4 times of mixture total weight amounts again, thermal response 2～5h under the condition of 1～3atm promptly obtains hydrated calcium silicate.
Embodiment five: present embodiment and embodiment four are different be in step 1 siliceous material and calcareous material by 1.2～1.4: 1 mixed is even.Other reactions steps is identical with embodiment four.
Embodiment six: present embodiment and embodiment four are different is that siliceous material and calcareous material are even by 1.2: 1 mixed in step 1.Other reactions steps is identical with embodiment four.
Embodiment seven: the siliceous material in the present embodiment is diatomite, opal or slag, and calcareous material is unslaked lime or white lime.
Embodiment eight: the concrete antifreezer that contains the aquation Calucium Silicate powder in the present embodiment is to be made by 40～50 parts hydrated calcium silicate, 40～50 parts antifreezing component, 2.5～5 parts diminishing component, 0.1 part bleed component and 5～8 parts flyash by weight, and its preparation is that routinely method mixes.
In the present embodiment when the volume of hydrated calcium silicate be cement amount 5% the time, the concrete strength of constructing 3 days can improve 20%～30%, 28 days intensity can improve 15%～20%.The volume that contains the concrete antifreezer of aquation Calucium Silicate powder in the present embodiment is 10% o'clock of cement amount in the concrete, under-15 ℃ of conditions, concrete-7+28 days intensity can reach mark and support 28 days concrete strengths, product performance can reach the GB475 standard-required, and salts contg reduction by 40% in the salts contg frostproofer more commonly used in the concrete, antifreezing effect is best.
Embodiment nine: present embodiment and embodiment eight are different is that the concrete antifreezer that contains the aquation Calucium Silicate powder is to be made by 35～45 parts hydrated calcium silicate, 35～45 parts antifreezing component, 3～4.5 parts diminishing component, 0.1 part bleed component and 5.5～7.5 parts flyash by weight.Other is identical with embodiment eight.
Embodiment ten: present embodiment and embodiment eight are different is that the concrete antifreezer that contains the aquation Calucium Silicate powder is to be made by 30～40 parts hydrated calcium silicate, 30～40 parts antifreezing component, 3.5～4 parts diminishing component, 0.1 part bleed component and 6～7 parts flyash by weight.Other is identical with embodiment eight.
Embodiment 11: present embodiment and embodiment eight are different is that the concrete antifreezer that contains the aquation Calucium Silicate powder is to be made by 35 parts hydrated calcium silicate, 35 parts antifreezing component, 3.7 parts diminishing component, 0.1 part bleed component and 6.5 parts flyash by weight.Other is identical with embodiment eight.
Embodiment 12: the described antifreezing component of present embodiment is NaNO
2Or Ca (NO
2)
2Other is identical with embodiment eight to 11.
Embodiment 13: the described antifreezing component of present embodiment is Ca (NO
2)
2Other is identical with embodiment eight to 11.
Embodiment 14: the described diminishing component of present embodiment is naphthalene sulfonic acid formaldehyde polymer, trimeric cyanamide formal condenses or maleic anhydride-methacrylic acid-diluted acid sulfonate.Other is identical with embodiment eight to 11.
Embodiment 15: the described diminishing component of present embodiment is a trimeric cyanamide formal condenses, and other is identical with embodiment eight to 11.
Embodiment 16: the described diminishing component of present embodiment is maleic anhydride-methacrylic acid-diluted acid sulfonate, and other is identical with embodiment eight to 11.
Embodiment 17: the described bleed component of present embodiment is a triterpenoid saponin.Other is identical with embodiment eight to 11.
Claims (10)
1. hydrated calcium silicate is characterized in that hydrated calcium silicate made by calcareous material, siliceous material and water, and wherein the weight ratio of calcareous material and siliceous material is 1.2～1.5: 1, and the weight of water is 3～4: 1 with the gross weight ratio of calcareous material and siliceous material.
2. hydrated calcium silicate according to claim 1, the weight ratio that it is characterized in that calcareous material and siliceous material is 1.2～1.4: 1.
3. hydrated calcium silicate according to claim 1, the weight ratio that it is characterized in that calcareous material and siliceous material is 1.2: 1.
4. hydrated calcium silicate according to claim 1 is characterized in that the siliceous material in the hydrated calcium silicate is diatomite, opal or slag.
5. hydrated calcium silicate according to claim 1 is characterized in that the calcareous material in the hydrated calcium silicate is unslaked lime or white lime.
6. the method for preparing the described hydrated calcium silicate of claim 1, preparation method's the step that it is characterized in that hydrated calcium silicate is as follows: 1.2～1.5: 1 mixed is even by weight with calcareous material and siliceous material earlier, levigate then 3～10% the fineness that tails over to 45 μ, the water furnishing pulpous state material and the mixing that add 3～4 times of mixture total weight amounts again, thermal response 2～5h under the condition of 1～3atm promptly obtains hydrated calcium silicate.
7. the concrete antifreezer that contains the described hydrated calcium silicate of claim 1 is characterized in that described concrete antifreezer is to be made up of 40～50 parts hydrated calcium silicate, 40～50 parts antifreezing component, 2.5～5 parts diminishing component, 0.1 part bleed component and 5～8 parts flyash by weight.
8. the concrete antifreezer that contains the aquation Calucium Silicate powder according to claim 7 is characterized in that described antifreezing component is NaNO
2Or Ca (NO
2)
2
9. the concrete antifreezer that contains the aquation Calucium Silicate powder according to claim 7 is characterized in that described diminishing component is naphthalene sulfonic acid formaldehyde polymer, trimeric cyanamide formal condenses or maleic anhydride-methacrylic acid-diluted acid sulfonate.
10. the concrete antifreezer that contains the aquation Calucium Silicate powder according to claim 7 is characterized in that described bleed component is a triterpenoid saponin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101446467A CN101182000A (en) | 2007-11-21 | 2007-11-21 | Hydrated calcium silicate as well as preparation method thereof and concrete anti-freeze agent containing the same |
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|---|---|---|---|
| CNA2007101446467A CN101182000A (en) | 2007-11-21 | 2007-11-21 | Hydrated calcium silicate as well as preparation method thereof and concrete anti-freeze agent containing the same |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830660A (en) * | 2010-03-19 | 2010-09-15 | 华东交通大学 | High-activity crystal seed for concrete production and preparation method thereof |
| CN102295421A (en) * | 2011-06-14 | 2011-12-28 | 宁波大学 | Crystal seed used for improving concrete early stage strength, and application thereof |
| CN102786246A (en) * | 2012-08-31 | 2012-11-21 | 句容宁武高新技术发展有限公司 | Concrete antifreezer |
| CN103449460A (en) * | 2012-06-05 | 2013-12-18 | 中央民族大学 | Preparation method of calcium silicate hydrate nano material |
| CN104150802A (en) * | 2014-07-17 | 2014-11-19 | 华东交通大学 | Synthesis method of crystal nucleus for promoting high-belite cement hydration progress |
| CN104402009A (en) * | 2014-10-29 | 2015-03-11 | 上海建工集团股份有限公司 | Calcium silicate hydrate gel solution early strength agent and preparation method thereof |
| CN106746834A (en) * | 2016-11-28 | 2017-05-31 | 中铁十二局集团有限公司 | A kind of graphene-based nanocrystal class early strength agent and preparation method thereof |
| CN107162010A (en) * | 2017-05-25 | 2017-09-15 | 内蒙古仁创沙漠资源利用研究院有限公司 | The hydrated calcium silicate for synthesizing the method for hydrated calcium silicate and being synthesized by this method |
| CN108164179A (en) * | 2017-11-24 | 2018-06-15 | 中国铁道科学研究院铁道建筑研究所 | A kind of cement concrete antifreezer suitable for ultra-low temperature surroundings |
| CN109369055A (en) * | 2018-11-22 | 2019-02-22 | 中耕耘成建筑科技(江苏)有限公司 | A kind of compound early strength agent and the self-compacting concrete using early strength agent preparation |
| CN109369051A (en) * | 2018-11-22 | 2019-02-22 | 中耕耘成建筑科技(江苏)有限公司 | A kind of preparation method of hydrated calcium silicate early strength agent and a kind of self-compacting concrete |
| CN114014580A (en) * | 2021-11-17 | 2022-02-08 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Early strength antifreezing agent and preparation method thereof |
| CN114315282A (en) * | 2022-01-17 | 2022-04-12 | 江苏中砼新材料科技有限公司 | Preparation method of early-strength anti-freezing recycled concrete |
-
2007
- 2007-11-21 CN CNA2007101446467A patent/CN101182000A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830660A (en) * | 2010-03-19 | 2010-09-15 | 华东交通大学 | High-activity crystal seed for concrete production and preparation method thereof |
| CN101830660B (en) * | 2010-03-19 | 2012-05-02 | 华东交通大学 | High-activity crystal seed for concrete production and preparation method thereof |
| CN102295421A (en) * | 2011-06-14 | 2011-12-28 | 宁波大学 | Crystal seed used for improving concrete early stage strength, and application thereof |
| CN102295421B (en) * | 2011-06-14 | 2013-04-24 | 宁波大学 | Crystal seed used for improving concrete early stage strength, and application thereof |
| CN103449460A (en) * | 2012-06-05 | 2013-12-18 | 中央民族大学 | Preparation method of calcium silicate hydrate nano material |
| CN102786246A (en) * | 2012-08-31 | 2012-11-21 | 句容宁武高新技术发展有限公司 | Concrete antifreezer |
| CN104150802A (en) * | 2014-07-17 | 2014-11-19 | 华东交通大学 | Synthesis method of crystal nucleus for promoting high-belite cement hydration progress |
| CN104402009B (en) * | 2014-10-29 | 2017-02-15 | 上海建工集团股份有限公司 | Calcium silicate hydrate gel solution early strength agent and suction filtration preparation method thereof |
| CN104402009A (en) * | 2014-10-29 | 2015-03-11 | 上海建工集团股份有限公司 | Calcium silicate hydrate gel solution early strength agent and preparation method thereof |
| CN106746834A (en) * | 2016-11-28 | 2017-05-31 | 中铁十二局集团有限公司 | A kind of graphene-based nanocrystal class early strength agent and preparation method thereof |
| CN106746834B (en) * | 2016-11-28 | 2018-12-14 | 中铁十二局集团有限公司 | A kind of graphene-based nanocrystal class early strength agent and preparation method thereof |
| CN107162010A (en) * | 2017-05-25 | 2017-09-15 | 内蒙古仁创沙漠资源利用研究院有限公司 | The hydrated calcium silicate for synthesizing the method for hydrated calcium silicate and being synthesized by this method |
| CN108164179A (en) * | 2017-11-24 | 2018-06-15 | 中国铁道科学研究院铁道建筑研究所 | A kind of cement concrete antifreezer suitable for ultra-low temperature surroundings |
| CN109369055A (en) * | 2018-11-22 | 2019-02-22 | 中耕耘成建筑科技(江苏)有限公司 | A kind of compound early strength agent and the self-compacting concrete using early strength agent preparation |
| CN109369051A (en) * | 2018-11-22 | 2019-02-22 | 中耕耘成建筑科技(江苏)有限公司 | A kind of preparation method of hydrated calcium silicate early strength agent and a kind of self-compacting concrete |
| CN109369055B (en) * | 2018-11-22 | 2022-01-21 | 中耕耘成建筑科技(江苏)有限公司 | Composite early strength agent and self-compacting concrete prepared by utilizing same |
| CN114014580A (en) * | 2021-11-17 | 2022-02-08 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Early strength antifreezing agent and preparation method thereof |
| CN114014580B (en) * | 2021-11-17 | 2023-02-24 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Early-strength antifreezing agent and preparation method thereof |
| CN114315282A (en) * | 2022-01-17 | 2022-04-12 | 江苏中砼新材料科技有限公司 | Preparation method of early-strength anti-freezing recycled concrete |
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Open date: 20080521 |