Coal gangue-based microporous concrete, heat-preserving composite wallboard and preparation methods thereof

Abstract

The invention provides a coal gangue-based microporous concrete, a heat-preserving composite wallboard and preparation methods thereof, belonging to the field of building operation. The microporous concrete based on coal gangue comprises 100 parts of cement, 20-50 parts of coal gangue, 0-50 parts of sand, 50-80 parts of ceramsite, 1-3 parts of a water reducing agent, 0.1-1 part of polypropylene fibers, 0.3-0.8 part of a foaming agent, 0.05-0.5 part of a thickener, and 30-50 parts of water, wherein the coal gangue is coal gangue powder, spontaneous combustion ash of coal gangue, or a mixture ofthe coal gangue powder and the spontaneous combustion ash of coal gangue. The coal gangue is claystone or sandstone gangue, and comprises the following chemical components: 40%-70% of SiO2, 10%-30% of Al2O3, no more than 6% of Fe2O3, no more than 10% of CaO and no more than 2% of MgO. According to the invention, the coal gangue is utilized to the greatest extent, the recycling of the coal gangueis realized, and realizes the double benefits of reduction in environmental pollution and conservation of building materials are achieved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to coal gangue-based microporous concrete, a thermal insulation composite wallboard and a preparation method thereof. Background technique [0002] Precast concrete wall panels are widely used in the construction of non-load-bearing walls of houses. In recent years, with the rapid development of my country's construction industrialization, there are more and more engineering applications using precast concrete wall panels. New precast concrete wall panel technology is developing rapidly. [0003] Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process. At present, the utilization rate of coal gangue in our country is low, and a large amount of coal gangue is stacked in the open air, which not only occup...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of coal gangue-based microporous concrete, thermal insulation composite wallboard and preparation method thereof, to solve the problem that coal gangue has single usage and limited dosage when coal gangue is used as aggregate to make prefabricated concrete wallboard. Activation treatment is required to increase the production process, and the wall insulation function is poor

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