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

A technology of composite cementitious material and desulfurization 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 achieves the advantages of large-scale production, improved utilization rate, alkalinity moderate effect

Inactive Publication Date: 2012-01-11
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 of the following raw materials in weight percentage:

[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, fineness is 300 mesh steel slag 150g, stimulator 20g, described stimulant is formed by mixing sodium silicate, kaolin, aluminum potassium sulfate accounting for respectively 20%, 30%, 50% of the percentage of stimulator weight.

[0038] Prepared as follows:

[0039] (1) Grind the steel slag in a Ф500×500mm test mill for 2-4 hours, and sieve it for later use; sieve the desulfurized gypsum to remove large particles, and set it aside for later use;

[0040] (2) Utilize the building gypsum consistency meter to measure the water consumption of the standard consistency of the cementitious material, measure the water of the standard consistency water consumption with a graduated cylin...

Embodiment 2

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

[0045] 650g of desulfurized gypsum, 350g of steel slag, and 1g of activator. The activator is formed by mixing sodium silicate, kaolin, and potassium aluminum sulfate accounting for 20%, 30%, and 50% of the weight of the activator respectively.

[0046] The preparation method is the same as in Example 1 except that the curing method is changed to the standard curing with 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 of the following raw materials in weight percentage:

[0049] Desulfurization gypsum 900g, steel slag 100g, activator 10g, described activator is formed by mixing sodium silicate, aluminum sulfate, kaolin, and aluminum potassium sulfate respectively accounting for 9%, 30%, 30%, and 31% of the percentage by weight of the activator become.

[0050] The preparation method is the same as in 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 flue gas desulfurization projects in power plants, a large amount of desulfurization by-product - desulfurization gypsum has been produced. It is estimated that in recent years, the annual output of flue gas desulfurization gypsum in China will reach about 20 million tons. Therefore, it is of great significance to study desulfurized gypsum and its application in the building materials industry from the perspective of resource utilization and sustainable development. Desulfurization 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 sul...

Claims

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Application Information

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Patent Type & Authority Patents(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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