Application of surface tension adjustment reduction type polycarboxylate superplasticizer in preparing high-performance concrete

A technology of high-performance concrete and surface tension, applied in the field of water reducing agent, can solve problems such as low water-binder ratio, large increase in project cost, and cracking

Active Publication Date: 2017-02-08
河北红墙新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0035] Although the use of these shrinkage reducing agents reduces the shrinkage of concrete to a certain extent, the engineering cost increases greatly and the synthesis process is complicated.
[0036] Due to the large amount of cementitious materials used and the low water-to-binder ratio of HPC, its cracking problem is particularly promi

Method used

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  • Application of surface tension adjustment reduction type polycarboxylate superplasticizer in preparing high-performance concrete
  • Application of surface tension adjustment reduction type polycarboxylate superplasticizer in preparing high-performance concrete
  • Application of surface tension adjustment reduction type polycarboxylate superplasticizer in preparing high-performance concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] An embodiment of the surface tension-adjusted shrinkage-reduced polycarboxylic acid water reducer of the present invention, the preparation method of the surface tension-adjusted shrinkage-reduced polycarboxylic acid water reducer is as follows:

[0087] (1) In a 500ml four-necked glass flask equipped with a stirrer, thermometer and reflux condenser, add 0.5mol methacrylic acid, 0.5mol benzyl alcohol, and methylbenzenesulfonic acid (the amount is methacrylic acid and benzyl alcohol). 2% of the total weight), 4-methoxyphenol (the amount is 0.2% of the total weight of methacrylic acid and benzyl alcohol), stir, heat up to 80°C, keep for 6 hours, and cool down to obtain the reaction product benzyl methacrylate Base ester.

[0088] (2) Add 1200ml of water, methacrylic acid, APEG, allyl polyoxypropylene ether, sodium allyl benzene sulfonate, mercaptoethanol, 2000ml four-necked glass flask equipped with a stirrer, thermometer and reflux condenser. In the benzyl methacrylate obtai...

Embodiment 2

[0090] An embodiment of the surface tension-adjusted shrinkage-reduced polycarboxylic acid water reducer of the present invention, the preparation method of the surface tension-adjusted shrinkage-reduced polycarboxylic acid water reducer is as follows:

[0091] (1) In a 500ml four-neck glass flask equipped with a stirrer, a thermometer and a reflux condenser, add 0.6 mol of acrylic acid, 0.5 mol of methyl benzyl alcohol, and methyl benzene sulfonic acid (the amount is methacrylic acid and benzyl alcohol). 2.5% of the total weight), methoxyhydroquinone (the amount is 0.3% of the total weight of methacrylic acid and benzyl alcohol), stir, heat up to 90°C, keep the temperature for 5 hours, and cool down to obtain the reaction product methyl benzyl acrylate ester.

[0092] (2) Add 1200 ml of water, acrylic acid, HPEG, allyl polyoxypropylene ether, sodium allyl benzene sulfonate, thioglycolic acid, step (2) into a 2000 ml four-neck glass flask equipped with a stirrer, thermometer and re...

Embodiment 3

[0094] An embodiment of the surface tension-adjusted shrinkage-reduced polycarboxylic acid water reducer of the present invention, the preparation method of the surface tension-adjusted shrinkage-reduced polycarboxylic acid water reducer is as follows:

[0095] (1) In a 500ml four-neck glass flask equipped with a stirrer, a thermometer and a reflux condenser, add 0.6 mol of methacrylic acid, 0.5 mol of phenethyl alcohol, and methylbenzene sulfonic acid (the amount is the total amount of methacrylic acid and benzyl alcohol). 2% by weight), 4-methoxyphenol (the amount is 0.2% of the total weight of methacrylic acid and benzyl alcohol), stir, heat up to 85°C, keep the temperature for 6h, and cool down to obtain the reaction product styrene ethyl methacrylate ester.

[0096] (2) Add 1200ml water, methacrylic acid, VPEG, allyl polyoxypropylene ether, sodium allyl benzene sulfonate, mercaptopropanol into a 2000ml four-neck glass flask equipped with a stirrer, thermometer and reflux conde...

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Abstract

The invention provides the application of a surface tension adjustment reduction type polycarboxylate superplasticizer in preparing a high-performance concrete. The invention also provides the high-performance concrete containing the surface tension adjustment reduction type polycarboxylate superplasticizer. The surface tension adjustment reduction type polycarboxylate superplasticizer can significantly reduce the surface tension of the aqueous solution. The result of the reduction test on the high-performance concrete shows that, the surface tension adjustment reduction type polycarboxylate superplasticizer is good in reduction effect. When the surface tension adjustment reduction type polycarboxylate superplasticizer is applied to the high-performance concrete, the workability and the strength of the high-performance concrete are not affected at all. Therefore, the cost performance is high.

Description

Technical field [0001] The invention relates to the use of a water-reducing agent, in particular to the use of a surface tension-adjusting shrinkage reduction type polycarboxylic acid water-reducing agent in the preparation of high-performance concrete. Background technique [0002] High performance concrete (HPC for short) is concrete with durability as its basic requirement. The development of high performance concrete is conducive to improving the use function of buildings, prolonging the service life of buildings, protecting the ecological environment, and promoting economic and social development. sustainable development. High-performance concrete is a new type of high-performance concrete. It refers to a concrete with high workability, high strength and high durability, which is prepared by adding admixtures and admixtures with conventional materials and production processes. , Has developed rapidly since its inception. However, in the application process of HPC, some pro...

Claims

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Application Information

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IPC IPC(8): C04B28/00C08F283/06C08F220/06C08F220/18C08F228/02
CPCC04B28/00C04B2103/302C08F283/065C04B18/08C04B18/12C04B14/06C04B14/02C08F220/06
Inventor 张小富赵利华白淑英
Owner 河北红墙新材料有限公司
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