CN102964529A - Reduced slushing agent for building concrete - Google Patents
Reduced slushing agent for building concrete Download PDFInfo
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- CN102964529A CN102964529A CN2012105267255A CN201210526725A CN102964529A CN 102964529 A CN102964529 A CN 102964529A CN 2012105267255 A CN2012105267255 A CN 2012105267255A CN 201210526725 A CN201210526725 A CN 201210526725A CN 102964529 A CN102964529 A CN 102964529A
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Abstract
The invention discloses a reduced slushing agent for building concrete, which is a high-efficiency polycarboxylate slushing agent. The reduced slushing agent for building concrete is prepared through adding maleic anhydride, diethylene glycol monobutyl ether, tertiary butanol and a catalyst into water firstly; then, heating the obtained mixture to 120 DEG C, carrying out heat preservation 4 hours, and cooling the obtained mixture to 80 DEG C; adding an initiator, a methacrylic acid and isoamyl alcohol polyoxyethylene ethers into the obtained mixture; continuing to carry out heat preservation 2 hours, and cooling the obtained solution to 35 DEG C; and neutralizing the obtained solution by using a neutralizing agent until the PH value of the obtained solution is 7-8. Through the way, the reduced slushing agent for building concrete disclosed by the invention can effectively improve the water reducing rate and dispersity of the slushing agent, and increase the strength of concrete, so that the concrete is excellent in slump retaining property, fluidity and crack resistance; and the slushing agent has a good compatibility with concrete.
Description
Technical field
The present invention relates to the building decoration technology field, particularly relate to a kind of building concrete shrinkage type water reducer.
Background technology
The cracking that concrete causes because of contraction can cause concrete intensity and weather resistance to be had a greatly reduced quality, thereby shortens concrete work-ing life.Cement water reducing agent is to reduce cement consumption, improve the industrial residue utilization rate, realize one of concrete durability and high performance technological approaches, also is to make concrete to one of critical material of high-tech area development.
At present, China's cement water reducing agent mainly contains the efficient water reducer such as naphthalene system, sulfamate, trimeric cyanamide.The most frequently used is ligno-sulfate based plasticizer, its low price, but its water-reducing rate is low, is 8%-10% only, and certain slow setting and bleed effect are arranged, and super mixing has a strong impact on concrete performance; Naphthalene system and melamine high-efficiency water-reducing agent, its water-reducing rate is generally about 20%, not bleed, slow setting not, reinforced effects is good, super mixing on the concrete performance impact not quite, but its cost of material is higher, and it is large to add the concrete slump loss of this class water reducer, and the raw materials such as used naphthalene, formaldehyde, trimeric cyanamide are harmful to human body and environment.Although these water reducers can reduce concrete contraction to a certain extent, but still can not satisfy the demand of engineering.
Summary of the invention
The technical problem that the present invention mainly solves is: for the deficiencies in the prior art, a kind of building concrete shrinkage type water reducer is provided, can effectively improve water-reducing rate and the dispersiveness of water reducer, increase concrete intensity, make concrete have good slump retaining, flowability and splitting resistance, better with concrete consistency.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of building concrete shrinkage type water reducer is provided, it is a kind of polycarboxylate high-efficiency water-reducing agent, described building concrete is to add first maleic anhydride in water with the shrinkage type water reducer, diethylene glycol monobutyl ether, the trimethyl carbinol and catalyzer, then be heated to 120 ℃, be incubated and be cooled to 80 ℃ after 4 hours, then add initiator, methacrylic acid and prenol Soxylat A 25-7, then continue insulation and be cooled to 35 ℃ after 2 hours, use again the neutralizing agent neutralization solution, be 7-8 and get final product to pH value.
In a preferred embodiment of the present invention, described building concrete is 20%-25% with the solid content of shrinkage type water reducer.
In a preferred embodiment of the present invention, described initiator is ammonium persulphate, and its add-on is 4%-8%.
In a preferred embodiment of the present invention, described neutralizing agent is sodium hydroxide, and its concentration is 32%-35%.
The invention has the beneficial effects as follows: adopt have good water-soluble, prenol Soxylat A 25-7 that can hydrolytic spoilage, greatly improved polymerization activity, conversion rate of products is high, and is high with the effective content of its synthetic water reducer product, the high comprehensive performance of water reducer, water-reducing rate and the dispersiveness of water reducer have effectively been improved, increase concrete intensity, make concrete have good slump retaining, flowability and splitting resistance, better with concrete consistency.
Embodiment
The below is described in detail preferred embodiment of the present invention, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that protection scope of the present invention is made more explicit defining.
The embodiment of the invention comprises:
A kind of building concrete shrinkage type water reducer, it is a kind of polycarboxylate high-efficiency water-reducing agent, described building concrete is to add first maleic anhydride, diethylene glycol monobutyl ether, the trimethyl carbinol and catalyzer in water with the shrinkage type water reducer, then be heated to 120 ℃, be incubated and be cooled to 80 ℃ after 4 hours, then add initiator, methacrylic acid and prenol Soxylat A 25-7, then continue insulation and be cooled to 35 ℃ after 2 hours, use again the neutralizing agent neutralization solution, be 7-8 and get final product to pH value.
Wherein, described building concrete is 20%-25% with the solid content of shrinkage type water reducer.
Described initiator is ammonium persulphate, and its add-on is 4%-8%, is preferably 7%, its low price, and gained solution water tolerance is better.
Described neutralizing agent is sodium hydroxide, and its concentration is 32%-35%, is preferably 33.5%, is one of the strongest bases, can generate sodium salt with acid-respons, the pH value of neutralization solution.
Building concrete of the present invention has the following advantages with the shrinkage type water reducer: 1) volume is low, only needs to mix 2%-5% in concrete, and water-reducing rate is reached more than 30%; 2) slump retaining is good, the basic free of losses of the slump in 90 minutes; 3) good with concrete consistency; 4) the low contraction has certain amount of air entrainment; 5) can reduce cost; 6) do not contain the harmful materials such as formaldehyde, environmentally safe.
The present invention has disclosed a kind of building concrete shrinkage type water reducer, employing has good water-soluble, prenol Soxylat A 25-7 that can hydrolytic spoilage, greatly improved polymerization activity, conversion rate of products is high, effective content with its synthetic water reducer product is high, the high comprehensive performance of water reducer, water-reducing rate and the dispersiveness of water reducer have effectively been improved, increase concrete intensity, make concrete have good slump retaining, flowability and splitting resistance, better with concrete consistency.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes description of the present invention to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (4)
1. building concrete shrinkage type water reducer, it is a kind of polycarboxylate high-efficiency water-reducing agent, it is characterized in that, described building concrete is to add first maleic anhydride, diethylene glycol monobutyl ether, the trimethyl carbinol and catalyzer in water with the shrinkage type water reducer, then be heated to 120 ℃, be incubated and be cooled to 80 ℃ after 4 hours, then add initiator, methacrylic acid and prenol Soxylat A 25-7, then continue insulation and be cooled to 35 ℃ after 2 hours, use again the neutralizing agent neutralization solution, be 7-8 and get final product to pH value.
2. building concrete according to claim 1 shrinkage type water reducer is characterized in that, described building concrete is 20%-25% with the solid content of shrinkage type water reducer.
3. building concrete according to claim 1 shrinkage type water reducer is characterized in that, described initiator is ammonium persulphate, and its add-on is 4%-8%.
4. building concrete according to claim 1 shrinkage type water reducer is characterized in that, described neutralizing agent is sodium hydroxide, and its concentration is 32%-35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012105267255A CN102964529A (en) | 2012-12-10 | 2012-12-10 | Reduced slushing agent for building concrete |
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| CN2012105267255A CN102964529A (en) | 2012-12-10 | 2012-12-10 | Reduced slushing agent for building concrete |
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| CN102964529A true CN102964529A (en) | 2013-03-13 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613317A (en) * | 2013-11-08 | 2014-03-05 | 安徽省阜南绿原化工有限公司 | High-solid content polycarboxylate superplasticizer |
| CN104592460A (en) * | 2015-01-28 | 2015-05-06 | 南京瑞迪高新技术有限公司 | Preparation method of reduction type polycarboxylate superplasticizer |
| CN104761173A (en) * | 2014-12-23 | 2015-07-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Polycarboxylate water reducer with good reducing effect and preparation method thereof |
| CN110003402A (en) * | 2019-04-23 | 2019-07-12 | 四川同舟化工科技有限公司 | A kind of anti-mud collapse protective poly-carboxylic acid water reducing agent and its low temperature preparation method of lower shrinkage high-adaptability |
| CN110746553A (en) * | 2019-11-25 | 2020-02-04 | 中建西部建设新疆有限公司 | Low-shrinkage viscosity-reduction type polycarboxylate superplasticizer and preparation method and application thereof |
| CN115043608A (en) * | 2022-06-29 | 2022-09-13 | 江苏万邦新材料科技有限公司 | Shrinkage-reducing water reducing agent for building concrete and preparation method thereof |
| CN116409978A (en) * | 2023-03-29 | 2023-07-11 | 江西嘉佳和装配式建筑有限公司 | Preparation of environment-friendly autoclaved aerated concrete block |
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| CN101538134A (en) * | 2009-04-14 | 2009-09-23 | 大连市建筑科学研究设计院股份有限公司 | Polyether class polycarboxylic acid high-efficiency water reducing agent and preparation method thereof |
| CN101928114A (en) * | 2010-08-30 | 2010-12-29 | 大连建科北方化学有限公司 | High water reduction high collapse protection type polycarboxylate high-performance water reducer and pyrogen-free preparation method thereof |
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Patent Citations (2)
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| CN101538134A (en) * | 2009-04-14 | 2009-09-23 | 大连市建筑科学研究设计院股份有限公司 | Polyether class polycarboxylic acid high-efficiency water reducing agent and preparation method thereof |
| CN101928114A (en) * | 2010-08-30 | 2010-12-29 | 大连建科北方化学有限公司 | High water reduction high collapse protection type polycarboxylate high-performance water reducer and pyrogen-free preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613317A (en) * | 2013-11-08 | 2014-03-05 | 安徽省阜南绿原化工有限公司 | High-solid content polycarboxylate superplasticizer |
| CN104761173A (en) * | 2014-12-23 | 2015-07-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Polycarboxylate water reducer with good reducing effect and preparation method thereof |
| CN104592460A (en) * | 2015-01-28 | 2015-05-06 | 南京瑞迪高新技术有限公司 | Preparation method of reduction type polycarboxylate superplasticizer |
| CN104592460B (en) * | 2015-01-28 | 2017-03-08 | 南京瑞迪高新技术有限公司 | A kind of preparation method of shrinkage type polycarboxylate high performance water-reducing agent |
| CN110003402A (en) * | 2019-04-23 | 2019-07-12 | 四川同舟化工科技有限公司 | A kind of anti-mud collapse protective poly-carboxylic acid water reducing agent and its low temperature preparation method of lower shrinkage high-adaptability |
| CN110746553A (en) * | 2019-11-25 | 2020-02-04 | 中建西部建设新疆有限公司 | Low-shrinkage viscosity-reduction type polycarboxylate superplasticizer and preparation method and application thereof |
| CN115043608A (en) * | 2022-06-29 | 2022-09-13 | 江苏万邦新材料科技有限公司 | Shrinkage-reducing water reducing agent for building concrete and preparation method thereof |
| CN116409978A (en) * | 2023-03-29 | 2023-07-11 | 江西嘉佳和装配式建筑有限公司 | Preparation of environment-friendly autoclaved aerated concrete block |
| CN116409978B (en) * | 2023-03-29 | 2024-06-28 | 江西嘉佳和装配式建筑有限公司 | Preparation of environment-friendly autoclaved aerated concrete block |
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Application publication date: 20130313 |