Early-strength polycarboxylate type high-performance water reducing agent and preparation method

A polycarboxylate-based, high-performance technology, applied in the field of early-strength polycarboxylate-based high-performance water reducer and its preparation, can solve problems such as slow development of early strength, and achieve simplified process, high water reduction rate, and improved efficiency. Effect

Active Publication Date: 2016-06-08
河南新汉材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects of slow early strength development of existing po...

Method used

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  • Early-strength polycarboxylate type high-performance water reducing agent and preparation method

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Experimental program
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Effect test

Embodiment 1

[0052]An early-strength polycarboxylate-based high-performance water reducer, composed of methallyl polyoxyethylene ether 100, acrylic acid 10, maleic anhydride 5, 2-acrylamide-2-methylpropane Sulfonic acid 5, sodium methacrylate sulfonate 0, hydrogen peroxide 2.1, ammonium persulfate 0.5, L-ascorbic acid 0.23, sodium formaldehyde sulfoxylate dihydrate 0.08, mercaptoacetic acid 0, mercaptopropionic acid 0.39, sodium hydroxide 14 and water 180 compositions.

[0053] The synthesis steps of the water reducer are as follows:

[0054] 1) Take methallyl polyoxyethylene ether, acrylic acid, maleic anhydride, 2-acrylamide-2-methylpropanesulfonic acid, sodium methacrylsulfonate, hydrogen peroxide, ammonium persulfate, L-Ascorbic acid, sodium formaldehyde sulfoxylate dihydrate, thioglycolic acid, mercaptopropionic acid, sodium hydroxide and water.

[0055] 2) Put methallyl polyoxyethylene ether, hydrogen peroxide, ammonium persulfate, sodium methacrylate sulfonate and water accounting...

Embodiment 2

[0061] An early-strength polycarboxylate-based high-performance water reducer, composed of methallyl polyoxyethylene ether 100, acrylic acid 6, maleic anhydride 6, 2-acrylamide-2-methylpropane by weight ratio Sulfonic acid 0, sodium methacrylate sulfonate 3, hydrogen peroxide 1.1, ammonium persulfate 2.3, L-ascorbic acid 0.05, sodium formaldehyde sulfoxylate dihydrate 0.05, thioglycolic acid 0.19, mercaptopropionic acid 0, sodium hydroxide 10 and water 110 compositions.

[0062] The synthesis steps of the water reducer are as follows:

[0063] 1) Take methallyl polyoxyethylene ether, acrylic acid, maleic anhydride, 2-acrylamide-2-methylpropanesulfonic acid, sodium methacrylsulfonate, hydrogen peroxide, ammonium persulfate, L-Ascorbic acid, sodium formaldehyde sulfoxylate dihydrate, thioglycolic acid, mercaptopropionic acid, sodium hydroxide and water.

[0064] 2) Put methallyl polyoxyethylene ether, hydrogen peroxide, ammonium persulfate, sodium methacrylate sulfonate and wa...

Embodiment 3

[0070] An early-strength polycarboxylic acid-based high-performance water reducer, composed of methallyl polyoxyethylene ether 100, acrylic acid 5, maleic anhydride 10, 2-acrylamide-2-methylpropane Sulfonic acid 10, sodium methacrylate sulfonate 5, hydrogen peroxide 2.5, ammonium persulfate 2.8, L-ascorbic acid 0.25, sodium formaldehyde sulfoxylate dihydrate 0.25, thioglycolic acid 0.5, mercaptopropionic acid 0.5, sodium hydroxide 20 and water 200 compositions.

[0071] The synthesis steps of the water reducer are as follows:

[0072] 1) Take methallyl polyoxyethylene ether, acrylic acid, maleic anhydride, 2-acrylamide-2-methylpropanesulfonic acid, sodium methacrylsulfonate, hydrogen peroxide, ammonium persulfate, L-Ascorbic acid, sodium formaldehyde sulfoxylate dihydrate, thioglycolic acid, mercaptopropionic acid, sodium hydroxide and water.

[0073] 2) Put methallyl polyoxyethylene ether, hydrogen peroxide, ammonium persulfate, sodium methacrylate sulfonate and water accou...

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Abstract

The invention relates to an early-strength polycarboxylate type high-performance water reducing agent and a preparation method. The early-strength polycarboxylate type high-performance water reducing agent is prepared from methyl allyl polyethenoxy ether, acrylic acid, maleic anhydride, 2-acrylamide-2-methyl propane sulfonic acid, sodium methallyl sulfonate, hydrogen peroxide, ammonium persulfate, L-ascorbic acid, dihydrate sodium formaldehyde sulfoxylate, mercaptoacetic acid, mercaptopropionic acid, sodium hydroxide and water. The newly-stirred concrete added with the water reducing agent has good workability; the water reducing rate can reach 30 percent or more; the 1d pressure-resistant intensity of the concrete can reach 185 percent to 198 percent; the 3d pressure-resistant intensity ratio can reach 176 percent to 187 percent; the concrete setting time is obviously shortened; the early strength of the concrete can be obviously improved; the rustiness effect on steel bars does not exist; no alkali-aggregate reaction occurs; a series of advantages such as concrete structure durability are practically guaranteed; the market prospects are wide. The product is widely applicable to various stages of commodity concrete and high-quality concrete for high-speed railways, high-speed highways, large-scale bridges, prefabricated components, airports, port buildings and the like, and is particularly suitable for being used for various concrete engineering constructions with the early strength requirements and concrete construction in low-temperature environment.

Description

technical field [0001] The invention belongs to the field of preparation of concrete admixtures, in particular to an early-strength polycarboxylate high-performance water reducer and a preparation method. Background technique [0002] Polycarboxylate high-performance water reducer is the third generation of new high-performance water reducer successfully developed and produced after lignin, naphthalene, aliphatic and sulfamate-based water reducers. It has the advantages of high water reducing rate, good slump retention, good adaptability to cement, small shrinkage rate, etc., and the production process is environmentally friendly and pollution-free. It is an environmentally friendly product and has been widely used in various engineering fields. [0003] In recent years, my country has developed rapidly in the research and application of polycarboxylic acid-based high-performance water-reducers, and the application has gradually shifted from major projects to civil projects....

Claims

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Application Information

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IPC IPC(8): C04B24/16C08F283/06C08F220/06C08F222/06C08F220/58C08F228/02C04B103/30
CPCC04B24/165C04B2103/302C08F283/065C08F220/06C08F222/06C08F220/585C08F228/02
Inventor 孙磊徐清举
Owner 河南新汉材料科技有限公司
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