High-adaptability mud-resistant water reducing agent and preparation method thereof

An adaptable, water-reducing agent technology, applied in the field of highly adaptable anti-mud type water-reducing agents, can solve problems such as poor adaptability, and achieve the effects of ensuring durability, increasing rigidity, and excellent adsorption performance

Active Publication Date: 2021-07-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can make up for the shortcomings of poor adaptability of conventional polycarboxylate superplasticizers in today's market when they encounter ground materials with large mud content

Method used

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  • High-adaptability mud-resistant water reducing agent and preparation method thereof
  • High-adaptability mud-resistant water reducing agent and preparation method thereof
  • High-adaptability mud-resistant water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]A method for preparing a highly adaptable mud-resistant water reducer, which is formed by polymerizing the following components, the total mass of raw materials is 1000 parts, and each raw material component includes:

[0036] 16.8 parts of 2-(allyloxy)phenol

[0037] Ethylene oxide 61.0 parts

[0038] Propylene oxide 242.1 parts

[0039] 0.8 parts of boron trifluoride and lithium aluminum tetrahydride with a mass ratio of 1:2.3

[0040] Acrylic acid 33.0 parts

[0041] 5.6 parts of ascorbic acid and sodium formaldehyde sulfoxylate with a mass ratio of 1:1.2

[0042] The mass ratio is 2:1 ammonium persulfate and azobisisobutyronitrile 6.7 parts

[0043] 3.2 parts of thioglycolic acid and mercaptoethanol with a mass ratio of 2:1.3

[0044] 7.3 parts of sodium bicarbonate and triisopropanolamine with a mass ratio of 1.3:1

[0045] The remainder is water, and the total mass is 1000 parts.

[0046] The preparation method is as follows:

[0047] (1) Add 16.80 parts of...

Embodiment 2-6

[0051] Concrete parameter (step is identical) in concrete raw material and preparation method is different with embodiment 1, specifically as shown in following table 1 and table 2 (table 1 is raw material, and table 2 is the parameter in preparation method), in table 2 Not listed expression is identical with embodiment 1:

[0052] The parts are all parts by mass.

[0053] Table 1

[0054]

[0055]

[0056]

[0057] Table 2

[0058]

[0059] The product of the present invention and Hubei Tengchen TC-900J water reducing agent were prepared into C50 concrete samples, and Tables 3 and 4 were obtained through testing.

[0060] table 3

[0061]

[0062] Table 4

[0063]

[0064] It can be seen from Table 4 that the highly adaptable anti-mud type superplasticizer solution synthesized by the method of the present invention shows better slump, water reducing rate and bleeding rate in the concrete system.

[0065] figure 1 , figure 2 SEM images of TC-900J wate...

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Abstract

The invention provides a high-adaptability mud-resistant water reducing agent and a preparation method thereof. According to the invention, by metering as 1000 parts in mass, the water reducing agent is mainly prepared from the following materials: 16.8 to 17.3 parts of a phenol alcohol head, 302.1 to 310.7 parts of a cyclic monomer, 0.4 to 1.2 parts of a catalyst, 32.1 to 33.0 parts of an acid substance, 3.2 to 7.9 parts of a reducing agent, 5.6 to 8.6 parts of an initiator, 5.9 to 9.4 parts of a neutralizing agent, 1.2 to 4.8 parts of a chain transfer agent and the balance of deionized water. The polyether monomer is prepared firstly, the acid-ether ratio of the water reducer is designed according to the molecular weight of the prepared polyether, polar functional groups with high adsorbability are introduced into polycarboxylic acid molecules through a free radical polymerization method by utilizing the advantage of high designability of the molecular structure of the polycarboxylic acid, the excellent adsorption and dispersion performance of the water reducing agent is ensured, and the water reducing agent has a very good anti-mud effect.

Description

technical field [0001] The invention belongs to the technical field of concrete, relates to the field of concrete admixtures, in particular to a highly adaptable mud-resistant water reducer. Background technique [0002] Polycarboxylate superplasticizer is widely used as a contemporary high-performance water reducer, and has become an indispensable component in concrete. Polycarboxylate superplasticizer has high water reducing rate, good slump retention, and molecular structure can be designed It is widely used in the preparation of high-performance concrete for highways, railways, bridges, and high-rise construction projects. However, the main problems of polycarboxylate superplasticizers are that the homogeneity of large monomers is too serious, and the requirements for serialization and functionalization are relatively prominent; the shrinkage of high-performance and high-strength concrete leads to concrete cracking; the high mud content of sand and gravel aggregates Lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08G65/28C04B24/26C04B103/30
CPCC08F283/065C08G65/2612C04B24/2647C04B2103/302C08F220/06
Inventor 李相国冷迪飞吕阳蹇守卫柯凯何晨昊
Owner WUHAN UNIV OF TECH
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