Corrosion-inhibiting and setting-inhibiting 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, can solve the problems of insufficient utilization, increased bleeding, and high price

Active Publication Date: 2021-08-03
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-inhibiting and setting-inhibiting synergistic cement water reducing agent and preparation method thereof
  • Corrosion-inhibiting and setting-inhibiting 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-retarding and setting-retarding synergistic cement water-reducer and a preparation method thereof, aiming to solve the existing polycarboxylate water-reducer problems of "poor adaptability, uneven dispersion, short coagulation time, Corrosivity" and other issues. The water reducer is compounded by ether type polycarboxylate water reducer, hydroxyethylidene diphosphonic acid, polycarboxylate dispersant, sodium gluconate, sodium hydroxide and water. The superplasticizer can make full use of the synergistic advantages of water treatment agents. On the one hand, it can effectively reduce the bleeding rate while increasing the fluidity of cement and reducing the amount of polycarboxylate superplasticizer; on the other hand, it can Give full play to the role of water quality stabilizer, increase the adaptability of cement to water quality, and reduce the corrosion of water quality on construction steel 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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Patent Type & Authority Patents(China)
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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