Desulfurization gypsum basic steel slag composite gelled material and preparation method thereof

A technology of composite cementitious material and desulfurized gypsum, which is applied in the field of desulfurized gypsum-based steel slag composite cementitious material and its preparation, can solve the problems of low utilization rate of steel slag and desulfurized gypsum, and facilitate large-scale production, improve utilization rate, alkali moderate effect

Inactive Publication Date: 2009-09-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the problem of low utilization rate of steel slag and desulfurized gypsum, the present invention provides a desulfurized gypsum-based steel slag composite cementitious material, which has certain mechanical strength, can be used for internal partition wall materials of non-load-bearing walls, etc., and can utilize steel slag in large quantities and desulfurized gypsum, while being able to expand the application fields of these two materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The desulfurized gypsum-based steel slag composite cementitious material is made from the following raw materials by weight:

[0037] Take the specific surface area as 3800-4000cm 2 / g, the fineness is 300 mesh desulfurization gypsum 850g, the specific surface area is 3000-4500cm 2 / g, the fineness is 300 mesh steel slag 150g, and the activator is 20g, and the activator is mixed with sodium silicate, kaolin, and potassium aluminum sulfate respectively accounting for 20%, 30%, and 50% of the weight of the activator.

[0038] Prepared in the following way:

[0039] (1) Grinding the steel slag in a Φ500×500mm test mill for 2-4 hours, sieving it for later use; sieving the desulfurized gypsum to remove large particles for later use;

[0040] (2) measure the standard consistency water consumption of the cementitious material with a gypsum plaster consistency meter, measure the water of the standard consistency water consumption with a measuring cylinder, pour it into the st...

Embodiment 2

[0044] The desulfurized gypsum-based steel slag composite cementitious material is made from the following raw materials by weight:

[0045] 650g of desulfurization gypsum, 350g of steel slag, and 1g of activator, the activator is mixed with sodium silicate, kaolin, and potassium aluminum sulfate, respectively accounting for 20%, 30%, and 50% of the weight of the activator.

[0046] The preparation method is the same as that of Example 1, except that the curing method is changed to the standard curing of a temperature of 20±2° C. and a humidity of 95%.

Embodiment 3

[0048] The desulfurized gypsum-based steel slag composite cementitious material is made from the following raw materials by weight:

[0049] 900g of desulfurization gypsum, 100g of steel slag, and 10g of activator, the activator is mixed with sodium silicate, aluminum sulfate, kaolin, and potassium aluminum sulfate, which account for 9%, 30%, 30%, and 31% of the weight of the activator, respectively. to make.

[0050] The preparation method is the same as Example 1, except that the curing method is changed to natural curing in the air (temperature 20±2°C) for 1 day, and then put into a curing box for standard curing (temperature 20±2°C, humidity 95%).

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Abstract

The invention relates to a desulfurization gypsum basic steel slag composite gelled material and a preparation method thereof. The desulfurization gypsum basic steel slag composite gelled material comprises the following raw materials by weight percentage: 65-95 of desulfurization gypsum, 5-35 of steel slag and an exciting agent of 0.1-5 of the total weight of the desulfurization gypsum and the steel slag, wherein the summation of the weight percentages of the desulfurization gypsum and the steel slag is 100 percent. The preparation method of the composite gelled material comprises the following steps: sifting the steel slag and the desulfurization gypsum for filtering out large grains and pouring the steel slag and the desulfurization gypsum into a material mixing pot for mixing for 20-30 minutes; gauging a standard consistency water consumption of water and pouring the water into an agitator kettle for standby; then weighing the exciting agent, adding the exciting agent to the mixture of the desulfurization gypsum and the steel slag by a first mixing method or a simultaneous mixing method and uniformly mixing the mixture; and agitating, molding and maintaining the mixed materials to obtain the composite gelled material. The method combines two industrial wastes so as to sufficiently improve the utilization rate of the steel slag and the desulfurization gypsum, change the wastes into valuables and also form the gypsum material with good heat preservation, heat insulation and sound insulation performance.

Description

technical field [0001] The invention relates to a desulfurized gypsum-based steel slag composite cementitious material and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] With the implementation and advancement of the flue gas desulfurization project in power plants, a large amount of desulfurization by-product - desulfurization gypsum is produced. It is estimated that the annual output of flue gas desulfurization gypsum in China in recent years is about 20 million tons. Therefore, it is of great significance to study desulfurization gypsum and its application in building materials industry from the viewpoint of resource utilization and sustainable development. Desulfurized gypsum is a very good building material resource. Its particles are fine and the particle size distribution is relatively concentrated. The crystals formed by hydration are relatively regular. The content of calcium sulfate dihydrate is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14B28B1/00B28C1/20B28C1/04B28B11/24C04B18/14
CPCC04B28/144C04B2111/28C04B2111/52Y02W30/91C04B12/04C04B18/142C04B22/064C04B40/0028
Inventor 王志范立瑛史国普姜伟
Owner UNIV OF JINAN
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