Coal gangue-based quick-hardening cementing material and preparation method thereof

A technology of coal gangue and hard glue is applied in the field of coal gangue-based fast-hardening cementitious materials and their preparation, and can solve the problems of reducing the preparation cost and reducing the natural environment.

Pending Publication Date: 2021-04-23
INNER MONGOLIA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a rapid hardening cementitious material prepared by using gypsum, coal gangue, calcium carbide slag, steel slag and other solid wastes plus mineralizers such as fluorite, chromium slag, barite, and its preparation method to solve the problem of material channels. Technical problems of widening, reduction of preparation cost, and protection of natural environment

Method used

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Embodiment Construction

[0045] The invention will be further described below in conjunction with specific examples.

[0046]The material proportioning required for preparing 1000g coal gangue-based rapid-hardening cementitious material is as follows:

[0047] 260g of coal gangue is high-alumina coal gangue produced in the Ordos area, and the residue on a 200-mesh square-hole sieve is <10%.

[0048] 31g of fly ash is solid waste produced in the Ordos area, and the sieve residue of 200 meshes is less than 10%.

[0049] 597g of calcium carbide slag is produced in Ulanqab area, and the residue on the 200-mesh square-hole sieve is less than 10%.

[0050] 86g of steel slag is solid waste produced in Baotou area, and the sieve residue of 200-mesh square-hole sieve is less than 10%.

[0051] 39g of kaolinite is natural kaolinite, and the sieve residue of 200-mesh square-hole sieve is less than 10%.

[0052] Volcanic ash 20g, is the volcanic ash produced in Lanchabu area, the activity index is 75%, the los...

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Abstract

The invention relates to a coal gangue-based quick-hardening cementing material and a preparation method thereof, the coal gangue-based quick-hardening cementing material contains tetracalcium sulphoaluminate, tricalcium silicate, dicalcium silicate and iron, part of SiO2 in coal gangue is calcined into tricalcium silicate, the coal gangue provides aluminum and siliceous, carbide slag provides calcium, gypsum, steel slag, fluorite, chromium slag and barite are added, and clinker is sintered at a low calcination temperature, and a certain amount of gypsum, limestone and volcanic ash are doped to prepare the quick-hardening cementing material. Part of SiO2 in the coal gangue is calcined into tricalcium silicate to enhance the early strength of the tricalcium silicate so that the material can be used for winter construction, emergency repair construction and the like; in the clinker calcination process, fluorite, chromium slag, barite and other mineralizers are added, and dicalcium silicate in steel slag has a nucleation effect so that the cementing material has a lower calcination temperature than traditional Portland cement, CO2 emission can be reduced, and environmental protection is facilitated.

Description

technical field [0001] The invention belongs to the field of civil engineering materials, in particular to a coal gangue-based rapid-hardening cementitious material and a preparation method thereof. Background technique [0002] Traditional sulfoaluminate cement contains a certain amount of tricalcium silicate, which is because Al in coal gangue 2 o 3 Compared with the bauxite used in the production of sulfoaluminate cement, the content of bauxite is less, and it does not have high early strength, and cannot be used for winter construction, emergency repair construction, etc., and the traditional calcination temperature of sulfoaluminate cement Higher, the emission of CO2 is more, which is not conducive to the protection of the environment. Contents of the invention [0003] The purpose of the present invention is to provide a rapid hardening cementitious material prepared by using gypsum, coal gangue, calcium carbide slag, steel slag and other solid wastes plus minerali...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B7/24C04B7/21C04B7/36C04B7/40C04B7/43C04B7/47C04B7/52
CPCC04B7/26C04B7/24C04B7/21C04B7/36C04B7/40C04B7/43C04B7/47C04B7/52Y02P40/10
Inventor 闫长旺孙存勇刘曙光张菊
Owner INNER MONGOLIA UNIV OF TECH
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