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Mud resistance and slump loss resistance type high-performance polycarboxylic acid water reducer and preparation method thereof

A slump-preserving polycarboxylate technology, which is applied in the field of concrete admixtures, can solve the problems of incompatibility between polycarboxylate water-reducers and ground materials, loss of concrete slump, and reduced performance of water-reducers to achieve good preservation Slump effect, good slump retention performance, and the effect of solving adaptability problems

Inactive Publication Date: 2016-01-27
四川恒泽建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the wide variety of raw materials used in the production of concrete and the large regional differences, it is often easy to cause inadaptability between polycarboxylate superplasticizers and ground materials, especially with the decline in the mining of natural river sand, the quality of sand gradually declines, and the quality of sand The trend of the mud content is becoming more and more obvious, and the mud powder contained in the sand has a high adsorption effect on the polycarboxylate high-performance superplasticizer, which greatly reduces the effectiveness of the superplasticizer, and the concrete slump loss is very large

Method used

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  • Mud resistance and slump loss resistance type high-performance polycarboxylic acid water reducer and preparation method thereof
  • Mud resistance and slump loss resistance type high-performance polycarboxylic acid water reducer and preparation method thereof
  • Mud resistance and slump loss resistance type high-performance polycarboxylic acid water reducer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] A mud-resistance and slump-preserving polycarboxylate high-performance water reducer, which includes the following raw materials in parts by weight: isopentenyl polyoxyethylene ether: 250; initiator: 2; liquid A: 130; liquid B: 130 ; Wherein, the initiator is ammonium persulfate; the chain transfer agent is thioglycolic acid; the reducing agent is ascorbic acid. The composition of liquid A and liquid B is shown in Table 1:

[0030] Table 1: Composition of A liquid and B liquid in embodiment 1

[0031]

[0032] The preparation method of the above-mentioned mud-resistant and slump-proof polycarboxylate high-performance water reducer comprises the following steps:

[0033] S1. Take each raw material according to the above parts by weight, and set aside;

[0034] S2. Initiator is added in the isopentenyl polyoxyethylene ether solution, the mass concentration of isopentenyl polyoxyethylene ether in the isopentenyl polyoxyethylene ether solution is 30%, isopentenyl polyo...

Embodiment 2

[0038] A mud-resistance and slump-proof polycarboxylate high-performance water reducer, which includes the following raw materials in parts by weight: isopentenyl polyoxyethylene ether: 400; initiator: 5; liquid A: 250; liquid B: 180 ; Wherein, the initiator is sodium persulfate; the chain transfer agent is mercaptopropionic acid; the reducing agent is sodium sulfite. The composition of liquid A and liquid B is shown in Table 2:

[0039] Table 2: Composition of A liquid and B liquid in embodiment 2

[0040]

[0041] The preparation method of the above-mentioned mud-resistant and slump-proof polycarboxylate high-performance water reducer comprises the following steps:

[0042] S1. Take each raw material according to the above parts by weight, and set aside;

[0043] S2. Initiator is added in the isopentenyl polyoxyethylene ether solution, the mass concentration of isopentenyl polyoxyethylene ether in the isopentenyl polyoxyethylene ether solution is 60%, isopentenyl polyox...

Embodiment 3

[0047] An anti-slump polycarboxylate high-performance water reducer, which includes the following raw materials in parts by weight: isopentenyl polyoxyethylene ether: 280; initiator: 5; liquid A: 170; liquid B: 150 ; Wherein, the initiator is potassium persulfate; the chain transfer agent is a combination of thioglycolic acid and mercaptopropionic acid, and the weight ratio is 1:2; the reducing agent is sodium bisulfite. The composition of liquid A and liquid B is shown in Table 3:

[0048] Table 3: Composition of A liquid and B liquid in embodiment 3

[0049]

[0050] The preparation method of the above-mentioned mud-resistant and slump-proof polycarboxylate high-performance water reducer comprises the following steps:

[0051] S1. Take each raw material according to the above parts by weight, and set aside;

[0052]S2. Initiator is added in the isopentenyl polyoxyethylene ether solution, the mass concentration of isopentenyl polyoxyethylene ether in the isopentenyl poly...

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Abstract

The invention discloses a mud resistance and slump loss resistance type high-performance polycarboxylic acid water reducer and a preparation method thereof. The water reducer comprises isopentenyl polyoxyethylene ether, an initiator, a solution A and a solution B, wherein the solution A comprises acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, sodium methylacrylsulfonate, 2-acrylamido-2-methylpropanesulfonic acid, vinyl acetate, vinyltriethoxysilane and water; and the solution comprises a chain transferring agent, a reducing agent and water. The high-performance polycarboxylic acid water reducer is obtained through scientific proportioning and multi-time test. The water reducer has high water reducing rate and good slump loss resistance, solves the problem of adaptability of polycarboxylic acid water reducers to concrete raw materials, and can realize a good slump loss resistance effect and reduce the slump loss of concrete when the water reducer is especially applied in case of concrete raw materials with large mud content; and the preparation method of the water reducer has the advantages of simple operation, convenient preparation, low cost, and suitableness for industrial large-scale production.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to a mud-resistant and slump-preserving polycarboxylate high-performance water reducer and a preparation method thereof. Background technique [0002] High-performance reducers are indispensable components for the preparation of high-performance concrete. The high performance of the water reducing agent means that it not only has a high water reducing rate and the performance of maintaining the slump of concrete for a long time, but also enables the prepared concrete to have good mechanical properties and excellent durability. The improvement of performance can not only improve the mechanical properties of high performance concrete to a great extent, but also further improve the construction performance. Polycarboxylate high-performance water reducer represents the future development direction of concrete admixture due to its excellent performance and green ...

Claims

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Application Information

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IPC IPC(8): C04B24/18C08F283/06C08F220/06C08F220/28C08F228/02C08F220/58C08F218/08C08F230/08C08F2/38C04B103/30
Inventor 任豪贾维龙
Owner 四川恒泽建材有限公司
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