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High sulfide resistant cement demixture and preparation thereof

A cement admixture, high sulfur resistance technology, applied in the field of building materials, can solve the problems of reduced production cost, high production cost, single type of sulfate corrosion, etc., and achieves the effect of increasing permeability resistance

Inactive Publication Date: 2006-06-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the type of sulfate attack targeted by this type of invention is relatively single, and the effect is greatly different under different sulfate attack environments.
On the other hand, the production cost of this invention is relatively high, and the production cost needs to be further reduced

Method used

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  • High sulfide resistant cement demixture and preparation thereof
  • High sulfide resistant cement demixture and preparation thereof
  • High sulfide resistant cement demixture and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the preparation method of high-sulfur-resistant cement admixture includes the following steps: 1). Pretreatment of blast furnace water-quenched slag: select commercially available blast-furnace water-quenched slag that meets national standards, dry it, and dry it. The water content is less than 2%, ready for use; 2) Preparation of modifier: use a polycarboxylic acid type hyperdispersant with a solid solution ratio of 1:2-3 to mix with triethanolamine grinding aid at a mass ratio of 1:1 3). Preparation of shrinking functional components: Alkylene glycol or polyoxyalkylene glycol and silica fume are mixed at a mass ratio of 1:15-20, ready for use; 4). Quenched by blast furnace water The mass ratio of slag to modifier is 100:0.01. Select pretreated blast furnace water-quenched slag and modifier, and add modifier to the pre-treated blast furnace water-quenched slag for mixed grinding to make its Blaine specific surface area. Reach 400-450m 2 / Kg, the ...

Embodiment 2

[0048] The preparation method of high-sulfur-resistant cement admixture includes the following steps: 1). Pretreatment of blast furnace water-quenched slag: select commercially available blast-furnace water-quenched slag that meets national standards, dry it, and moisture content after drying 0.5-1.9%, ready for use; 2). Preparation of modifier: It is made by mixing a polycarboxylic acid type hyperdispersant with a solid solution ratio of 1:2 and a triethanolamine grinding aid at a mass ratio of 1:0.7. Spare; 3). Preparation of shrinkage functional components: Alkylene glycol and silica fume are mixed at a mass ratio of 1:15, and spare; 4). The mass ratio of blast furnace water quenching slag to modifier is 100: 0.01 Select the pre-treated blast furnace water-quenched slag and modifier, and add the modifier to the pre-treated blast furnace water-quenched slag for mixed grinding to make the Blaine's specific surface area reach 400-450m 2 / Kg, the mixed abrasive is obtained; then th...

Embodiment 3

[0050] The preparation method of high-sulfur-resistant cement admixture includes the following steps: 1). Pretreatment of blast furnace water-quenched slag: select commercially available blast-furnace water-quenched slag that meets national standards, dry it, and moisture content after drying 0.5-1.9%, ready for use; 2). Preparation of modifier: a polycarboxylic acid type hyperdispersant with a solid solution ratio of 1:3 and a triethanolamine grinding aid are mixed at a mass ratio of 1:1. Spare; 3). Preparation of shrinkage functional components: polyoxyalkylene glycol and silica fume are mixed at a mass ratio of 1:20, and spare; 4). The mass ratio of blast furnace water quenched slag to modifier is 100: 0.02 Select the pretreated blast furnace water-quenched slag and modifier, and add the modifier to the pre-treated blast furnace water-quenched slag for mixed grinding to make the Blaine's specific surface area reach 400-450m 2 / Kg, the mixed abrasive is obtained; then the mixed ...

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Abstract

A cement additive with high resistance to sulfur is proportionally prepared from the water-quenched slags of blast furnace, the shrinkage reducing component consisting of alkylenediol or polyoxyalkylene glycol and wollastonite, and the modifier consisting of polycarboxylic acid type super-disperser and triethanolamine. It can resist against the corrosion of multiple sulfates.

Description

Technical field [0001] The invention belongs to the category of building materials, and specifically relates to a high-sulfur-resistant cement admixture and a preparation method thereof. Background technique [0002] As we all know, sulfate erosion is a key issue in the durability of concrete. my country is a place where concrete sulfate erosion occurs frequently. For example, concrete buildings in coastal areas, northwestern regions, and southwestern regions all have engineering damage caused by sulfate erosion. Instance. And in different regions and climates, there are different types of sulfate erosion. The development of high-sulfate-resistant cement varieties to solve the sulfate-resistant performance of concrete has become a technical method commonly used in engineering circles. There have been a lot of researches at home and abroad, and there are a lot of literature. The main technical content is: [0003] Sulfate-resistant Portland cement is mainly controlled by controlli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/14C04B24/12C04B24/24C04B103/40C04B103/52C04B111/72
CPCY02W30/91
Inventor 马保国罗忠涛高小建张美香
Owner WUHAN UNIV OF TECH
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