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Corrosion inhibition and coagulation inhibition synergistic cement water reducing agent and preparation method thereof

A water-reducing agent and setting retarding technology, which is applied in the field of corrosion-inhibiting and setting-inhibiting synergistic cement water-reducing agent and its preparation field, can solve the problems of limiting the application range of the water-reducing agent, failing to make full use of it, and increasing the amount of bleeding water. Achieve outstanding retardation effect, excellent dispersion performance, and reduce bleeding rate.

Active Publication Date: 2020-04-17
SHANDONG HUAYOU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, organic phosphoric acid has a significant effect on the retardation of cement, but it often causes an increase in bleeding
Polycarboxylate water treatment agent has good dispersion and corrosion inhibition, but it has not been fully utilized
[0004] In addition, as a high-efficiency water-reducer, the polycarboxylate water-reducer has a single component and high price, which also limits the application range of the water-reducer

Method used

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  • Corrosion inhibition and coagulation inhibition synergistic cement water reducing agent and preparation method thereof
  • Corrosion inhibition and coagulation inhibition synergistic cement water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh respectively 45 parts of ether type polycarboxylate superplasticizer mother liquor (40%), 0.8 part of hydroxyethylidene diphosphonic acid (60%), 16.4 parts of polyacrylic acid (PAA) dispersant (30%), solid sodium gluconate 8.3 servings. Wherein sodium gluconate is dissolved in an equal amount of water. Add the ether-type polycarboxylate superplasticizer mother liquor into the stirring tank, stir, and then add polyacrylic acid (PAA) dispersant (30%), hydroxyethylidene diphosphonic acid (60%), and sodium gluconate solution and stir to obtain a mixed solution . Slowly add 7.0 parts of 30% sodium hydroxide solution to the mixed solution to control the pH between 6-7. Add 14.2 parts of water to the mixed liquid, stir evenly, and obtain a cement water reducer.

Embodiment 2

[0021] Weigh respectively 45 parts of ether-type polycarboxylate superplasticizer mother liquor (40%), 0.8 parts of hydroxyethylidene diphosphonic acid (60%), 18.3 parts of sodium polyacrylate (PAAS) dispersant (30%), solid gluconic acid Sodium 8.3 parts. Wherein sodium gluconate is dissolved in an equal amount of water. Add the ether-type polycarboxylate superplasticizer mother liquor into the stirring tank, stir, add polyacrylic acid sodium (PAAS) dispersant (30%), hydroxyethylidene diphosphonic acid (60%), and sodium gluconate solution in turn and stir to obtain a mixed liquid. Slowly add 3.1 parts of 30% sodium hydroxide solution to the mixed solution to control the pH between 6-7. Add 16.2 parts of water to the mixed liquid, stir evenly, and obtain a cement water reducer.

Embodiment 3

[0023] Weigh 45 parts of ether-type polycarboxylate superplasticizer mother liquor (40%), 0.8 parts of hydroxyethylidene diphosphonic acid (60%), 16.4 parts of hydrolyzed polymaleic anhydride (HPMA) dispersant (30%), solid Sodium gluconate 8.3 parts. Wherein sodium gluconate is dissolved in an equal amount of water. Add the ether-type polycarboxylate superplasticizer mother liquor into the stirring tank, stir, and then add the hydrolyzed polymaleic anhydride (HPMA) dispersant (30%), hydroxyethylidene diphosphonic acid (60%), and sodium gluconate solution and stir, to obtain a mixture. Slowly add 6.1 parts of 30% sodium hydroxide solution to the mixed solution to control the pH=6-7. Add 15.1 parts of water to the mixed solution, and stir evenly to obtain a cement water reducer.

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Abstract

The invention discloses a corrosion inhibition and coagulation inhibition synergistic cement water reducing agent and a preparation method thereof. A purpose of the invention is to solve the problemsof poor adaptability, non-uniform dispersion, short coagulation time, corrosion to reinforcing steel bars and the like in the existing polycarboxylic acid water reducing agent. The water reducing agent of the invention is prepared by compounding an ether type polycarboxylic acid water reducing agent, 1-hydroxyethylidene-1,1-diphosphonic acid, a polycarboxylic acid dispersing agent, sodium gluconate, sodium hydroxide and water, and can fully utilize the synergistic advantage of a water treatment agent, so that the bleeding rate can be effectively reduced while the cement fluidity is improved and the dosage of the polycarboxylic acid water reducing agent is reduced, and the function of the water quality stabilizer can be fully played so as to increase the adaptability of cement to water quality and reduce corrosion of water quality to building steels and production materials.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a corrosion-retarding and setting-retarding synergistic cement water reducer and a preparation method thereof. Background technique [0002] my country is in the explosive period of the construction industry. The rapid development of the construction industry has put forward more extensive requirements for cement admixtures. As a high-end engineering admixture, polycarboxylate water reducer is now widely used in ordinary cement projects. Because of its dispersion It is increasingly favored due to its strong performance, low dosage, and small loss of concrete slump. In view of the expansion of the application of polycarboxylate superplasticizers, the research on admixtures also puts forward some new requirements. For example, CN201310421488.0 proposed "composite soil adsorbent for absorbing polycarboxylate superplasticizer with high content of soil in shielding concrete ...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/30
CPCC04B40/0039C04B2103/302C04B24/32C04B24/003C04B24/10C04B24/26C04B24/06
Inventor 石志付段丽菊
Owner SHANDONG HUAYOU CHEM
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