Polycarboxylate composite water reducing agent suitable for low-cementitious material concrete and preparation method thereof

A technology of composite water reducer and polycarboxylic acid, which is applied in the field of concrete with low cementitious materials, can solve the problems of compound water reducer such as easy deterioration, poor compatibility, and affecting use, and achieve good workability and good frost resistance , The effect of simple preparation method

Inactive Publication Date: 2010-08-11
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between the polycarboxylate water reducer and the composite material; and the composite water reducer after compounding is easy to deteriorate, which affects its use to a certain extent
At present, due to technical reasons, there is no effective method to prepare a composite water reducer suitable for low-gel material concrete.

Method used

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  • Polycarboxylate composite water reducing agent suitable for low-cementitious material concrete and preparation method thereof
  • Polycarboxylate composite water reducing agent suitable for low-cementitious material concrete and preparation method thereof
  • Polycarboxylate composite water reducing agent suitable for low-cementitious material concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In the 1000L reactor, 100kg of polycarboxylate superplasticizer (solid content 40%), 15kg of sodium gluconate (retarder), 0.3kg of defoamer, 0.45kg of air-entraining agent, 1.5kg of preservative, and tap water were successively put into the 1000L reactor. 383.5kg, stirred for about 20 minutes to make it dissolve into a uniform solution to obtain a polycarboxylic acid composite water reducer.

[0024] The polycarboxylate high-efficiency water reducer is the ZJ-SS-02 type water reducer produced by China Construction Commercial Concrete Company.

[0025] The defoamer is a polyether defoamer, selected: HFSP-6 defoamer produced by Nantong Hongfeng Industrial Auxiliary Co., Ltd.

[0026] The air-entraining agent is a triterpene saponin air-entraining agent, selected: "tea saponin" brand air-entraining agent produced by Zhejiang Tianma Chemical Co., Ltd.

[0027] The preservative is a composite preservative of parabens and formaldehyde (mixed by parabens and formaldehyde), an...

Embodiment 2

[0030] In the 1000L reaction kettle, put 100kg of polycarboxylate high-efficiency water reducer (solid content 40%), 12kg of borax (retarder), 0.3kg of defoamer, 0.45kg of air-entraining agent, 1.5kg of preservative, and 385.5kg of tap water , stirred for about 20 minutes to make it dissolve into a uniform solution, and the prepared solution concentration was 10.85% (mass), to obtain a polycarboxylic acid composite water reducer.

[0031] The polycarboxylate high-efficiency water reducer is the ZJ-SS-02 type water reducer produced by China Construction Commercial Concrete Company.

[0032] The defoamer is a polyether defoamer, selected: HFSP-6 defoamer produced by Nantong Hongfeng Industrial Auxiliary Co., Ltd.

[0033] The air-entraining agent is a triterpene saponin air-entraining agent, selected: "tea saponin" brand air-entraining agent produced by Zhejiang Tianma Chemical Co., Ltd.

[0034] The preservative is a compound preservative of parabens and formaldehyde (mixed by...

Embodiment 3

[0037] In the 1000L reactor, 100kg of polycarboxylate high-efficiency water reducer (solid content 40%), 10kg of sodium gluconate (retarder), 5kg of borax, 0.3kg of defoamer, 0.45kg of air-entraining agent, and 1.5kg of preservative were successively put into the 1000L reactor. kg, 383.5kg of tap water, stirred for about 20 minutes to make it dissolve into a uniform solution, and the prepared solution concentration was 11.45% (by mass), to obtain a polycarboxylic acid composite water reducer.

[0038] The polycarboxylate high-efficiency water reducer is the ZJ-SS-02 type water reducer produced by China Construction Commercial Concrete Company.

[0039] The defoamer is a polyether defoamer, selected: HFSP-6 defoamer produced by Nantong Hongfeng Industrial Auxiliary Co., Ltd.

[0040] The air-entraining agent is a triterpene saponin air-entraining agent, selected: "tea saponin" brand air-entraining agent produced by Zhejiang Tianma Chemical Co., Ltd.

[0041] The preservative i...

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Abstract

The invention relates to a polycarboxylate composite water reducing agent suitable for low-cementitious material concrete and a preparation method thereof. The polycarboxylate composite water reducing agent suitable for the low-cementitious material concrete is characterized by comprising the following components in percentage by mass: 15 to 25 percent of polycarboxylic high-performance water reducing agent, 1 to 5 percent of retarder, 0 to 0.10 percent of defoaming agent, 0.01 to 0.3 percent of air entraining agent, 0.3 to 0.5 percent of preservative and the balance of water, wherein the mass solid content of the polycarboxylic high-performance water reducing agent is 40 percent. The polycarboxylate composite water reducing agent is applied to the concrete, and has the water reducing rate over 20 percent by comparing the concrete with reference concrete; and the prepared concrete has the advantages of good workability, no dissociation or bleeding, and good freezing resistance and infiltration resistance, and can be used for preparing concrete with various strength grades between C20 and C40.

Description

technical field [0001] The invention relates to a preparation method of a polycarboxylate composite water reducer suitable for concrete. This composite water reducer is especially suitable for low gelling materials (the total amount of gelling materials is less than or equal to 380Kg / m 3 ) of concrete. Background technique [0002] In recent years, polycarboxylate high-performance water reducers at home and abroad have achieved rapid development, and their application in engineering has become more and more extensive. The superior performance of this type of product has attracted the attention of the concrete engineering field. Compared with naphthalene-based superplasticizers, polycarboxylate high-performance superplasticizers have lower dosage and higher water-reducing rate; wider adaptability, better fluidity and flow retention of concrete mixtures, and lower slump loss Low and many other advantages. [0003] Because the polycarboxylate superplasticizer has the characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B24/26C04B103/22C04B103/30C04B103/50
CPCC04B24/2641C04B2103/302C04B40/0039
Inventor 韩周冰王军孙克平熊骁辉黄波郑广军刘勇彰周金钟夏远英张宜顾芳邓均
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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