Self-compacting concrete prepared through condensation polymerization type-copolymerization type composite water reducing agent

A technology of self-compacting concrete and composite water-reducing agent, applied in the field of concrete, can solve the problems of unscientific and reasonable component mix ratio, poor effect of water-reducing agent and slump-retaining agent, unsatisfactory product performance and effect, etc. The distribution ratio is scientific and reasonable, the effect is ideal, and the effect of high durability

Inactive Publication Date: 2015-07-08
XINJIANG RONGNENG NEW MATERIAL
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor effect of the water reducing agent and slump retaining agent added in the existing self-compacting concrete, and the mixing ratio of the components is not scientific and reasonable, the performance and effect of the final product are not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1, the self-compacting concrete mix ratio prepared by this polycondensation-copolymerization composite water reducer is: cement 280kg / m 3 , sand 840kg / m 3 840kg / m of stones with a particle size of 5-20mm 3 , Class I fly ash 280kg / m 3 , water 175kg / m 3 , Polycondensation-copolymerization composite water reducer 4.8kg / m 3 , wherein the polycondensation-copolymerization composite water-reducer is composed of naphthalene-based water-reducer and polycarboxylate-based slump-retaining agent, and the ratio of naphthalene-based water-reducer and polycarboxylate-based slump-retaining agent is 3:2.

[0009] The polycarboxylic acid-based slump-retaining agent is completely different from the existing polycarboxylate-based slump-retaining agent in performance and preparation process. It belongs to an improved polycarboxylate-based slump-retaining agent, and its preparation process is as follows: In the reaction kettle, add hydroxyl-terminated polyoxyethylene ether, after...

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Abstract

The present invention discloses a self-compacting concrete prepared through a condensation polymerization type-copolymerization type composite water reducing agent. The self-compacting concrete comprises 280 kg / m<3> of cement, 840 kg / m<3> of sand, 840 kg / m<3> of stone with a particle size of 5-20 mm, 280 kg / m<3> of grade-I fly ash, 175 kg / m<3> of water, and 4.8 kg / m<3> of a condensation polymerization type-copolymerization type composite water reducing agent, wherein the condensation polymerization type-copolymerization type composite water reducing agent is formed by compounding a naphthalene water reducing agent and a polycarboxylic acid slump-retaining agent according to a ratio of 3:2. The self-compacting concrete of the present invention has the following advantages that: 1, the improved polycarboxylic acid slump-retaining agent has good water reducing effect and good plastic retaining effect; 2, the composite water reducing agent doped concrete provides the better workability compared with the concrete simply doped with the naphthalene water reducing agent; 3, the project trial results show that the self-compacting concrete of the present invention has characteristics of excellent mechanical properties, high volume stability, and high durability; and 4, the component ratio is scientific and rational, and the performance and the effect are satisfactory.

Description

technical field [0001] The invention relates to concrete, in particular to a self-compacting concrete prepared by polycondensation-copolymerization composite water reducer. Background technique [0002] Self-compacting concrete is able to flow and compact by its own weight, free to fill every corner of the formwork without vibrating, and obtain naturally dense concrete. At present, water-reducing agents and slump-retaining agents are added to self-compacting concrete to increase the high workability, high volume stability, and high durability of the concrete. However, the existing self-compacting concrete has poor effects of adding water-reducing agents and slump-retaining agents, and the mixing ratio of the components is not scientific and reasonable, resulting in unsatisfactory performance and effect of the final product. Contents of the invention [0003] The purpose of the present invention is to provide a self-compacting concrete prepared by polycondensation-copolyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/24C04B18/08
CPCY02W30/91
Inventor 房志荣董广安刘俊
Owner XINJIANG RONGNENG NEW MATERIAL
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