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Polycarboxylate superplasticizer as well as preparation method and application thereof

A technology of water reducing agent and polycarboxylic acid, applied in the field of building materials, can solve problems such as poor compatibility, achieve good dispersion ability and adaptability, improve working environment and improve quality.

Active Publication Date: 2021-06-29
HUNAN ZHONGYAN BUILDING MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, the mining of river sand and pebbles is prohibited at this stage, and the construction industry basically can only use machine-made sand and gravel materials. In related technologies, polycarboxylate superplasticizers are Concrete, including poor ground materials, is less compatible

Method used

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  • Polycarboxylate superplasticizer as well as preparation method and application thereof
  • Polycarboxylate superplasticizer as well as preparation method and application thereof
  • Polycarboxylate superplasticizer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] This embodiment prepared a polycarboxylate water reducer, the specific process is:

[0095] S1. Add nano-silica, hydroxyethyl acrylate and coupling agent to deionized water at a molar ratio of 1:1:1. After uniform dispersion, stir and react at 100°C for 3.5h, cool to room temperature, and then filter , washing and vacuum drying to obtain ester-modified silica;

[0096] S2. Mix 0.33g E51, 36.25g deionized water and 1.23g mercaptoethanol to prepare an aqueous solution, which is recorded as material A;

[0097] S3. Mix 30 g of acrylic acid, 15 g of the ester-modified silicon dioxide obtained in step S1, and 10 g of deionized water to prepare an aqueous solution, which is recorded as material B;

[0098] S4. 365g ethylene glycol monovinyl polyethylene glycol ether and 258g deionized water are added in the reactor, after stirring for 5 minutes, add 1g ferrous sulfate solution (mass fraction is 1%), add 2.37g after 5 minutes Hydrogen peroxide (mass fraction is 27.5%), add m...

Embodiment 2

[0101] This embodiment prepared a polycarboxylate water reducer, the difference between the specific process and Example 1 is:

[0102] (1) In step S2, the mass of mercaptoethanol is 1.13g.

Embodiment 3

[0104] This embodiment prepared a polycarboxylate water reducer, the difference between the specific process and Example 1 is:

[0105] (1) In step S1, the small ester molecule is hydroxypropyl acrylate instead of hydroxyethyl acrylate;

[0106] (2) In step S3, the mass of acrylic acid is 32g.

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Abstract

The invention discloses a polycarboxylate superplasticizer as well as a preparation method and application thereof, and belongs to the technical field of building materials. The polycarboxylate superplasticizer comprises a material A, a material B and a base material; the material A is prepared from a reducing agent 1 and a chain transfer agent; the material B is prepared from unsaturated acid and ester modified silicon dioxide; and the base material is prepared from the following raw materials: unsaturated polyoxyethylene ether, a reducing agent 2 and an oxidizing agent. According to the polycarboxylate superplasticizer disclosed by the invention, the modified inorganic filler is added, the affinity between a modified group in the modified inorganic filler and an organic part of the polycarboxylate superplasticizer is strong, and the affinity between an inorganic filler part and an inorganic raw material part of concrete is strong, so that the compatibility between the polycarboxylate superplasticizer and the inorganic raw material of the concrete can be improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a polycarboxylate water reducer, a preparation method and an application. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete, including lignosulfonate, naphthalenesulfonate formaldehyde polymer, melamine formaldehyde condensate, acetone sulfonate Salt formaldehyde condensate, sulfamate formaldehyde condensate and polycarboxylic acid etc. Compared with other types of water reducers, polycarboxylate water reducers have the advantages of small dosage, good slump retention performance, strong designability of molecular structure, great potential for high performance, relatively simple production process, and environmental protection. One of the best-selling superplasticizers at present. [0003] Polycarboxylate superplasticizers are usually obtained by solution...

Claims

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Application Information

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IPC IPC(8): C08F299/02C04B24/26C04B103/30
CPCC08F299/026C04B24/2605C04B2103/302Y02W30/91
Inventor 谭亮颜文海钟康杨洪田明贺任霍小伟刘雅卓幸余彬
Owner HUNAN ZHONGYAN BUILDING MATERIAL TECH CO LTD
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