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Steel slag-metakaolin compound gel material and preparation method thereof

A technology of composite cementitious material and metakaolin, which is applied in the directions of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of large emission and underutilization, etc.

Inactive Publication Date: 2006-11-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, steel slag and coal series kaolin have the largest emissions, and have not been well utilized

Method used

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  • Steel slag-metakaolin compound gel material and preparation method thereof
  • Steel slag-metakaolin compound gel material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] One, the preparation method of steel slag-metakaolin composite cementitious material:

[0022] The preparation method of steel slag-metakaolin composite cementitious material comprises the following steps: 1). Firstly, the steel slag with alkalinity>1.2 is ground until the specific surface area is 400-650m 2 / kg to form fine steel slag powder; take coal series kaolin and calcinate it at 650-800°C to obtain a specific surface area of ​​500-700m 2 / kg of metakaolin; pulverize sodium fluoride to form powder; then carry out mechanical mixing in the ratio of steel slag: metakaolin: sodium fluoride in the ratio of = 1: (0.1-9): (0.022-0.2) Make it uniform, then seal, pack, and seal to obtain steel slag-metakaolin-sodium fluoride powder; 2). Slowly add NaOH solid into the sodium silicate solution to dissolve to obtain a modulus of 1.0-2.0 and Baume degree Water glass solution at 33-44°; according to steel slag: water glass solution: Na 2 SO 4 The mass ratio is=1: (0.66-8): ...

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Abstract

Disclosed is a steel slag-metakaolin compound gel material which comprises steel slag, metakaolin, soluble glass solution, sodium sulfate, and sodium fluoride by the mass proportion of steel slag : metakaolin : soluble glass solution : Na2SO4 : NaF = 1:0.1-9:0.66-8:0.033-0.3:0.022-0.2.

Description

technical field [0001] The invention belongs to the category of inorganic non-metallic materials, and in particular relates to a cement clinker-free cementitious material and a preparation method thereof. Background technique [0002] The traditional cement industry is facing the challenge of sustainable development due to the large consumption of resources and energy in the cement production process, the discharge of a large amount of substances polluting the environment, and the defects in certain performances of the products; in addition, steel In addition to consuming a large amount of natural resources and energy, traditional basic industries such as electricity, coal, and metallurgy also produce a large amount of industrial waste, which puts land resources and the ecological environment under enormous pressure. All these factors have seriously restricted the construction of the national economy and the sustainable development strategy. Among them, steel slag and coal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14C04B22/12C04B18/14C04B14/04
CPCY02W30/91
Inventor 胡曙光丁庆军王红喜吕林女何永佳王发洲陈平
Owner WUHAN UNIV OF TECH