Coal gangue concrete as well as preparation method and application thereof

Abstract

The invention discloses coal gangue concrete as well as a preparation method and the application thereof. The coal gangue concrete comprises components of a coal gangue raw material and a concrete material, and particularly discloses the coal gangue concrete specifically prepared from the following components according to certain proportions: coal gangue aggregate, an admixture, a cementing material, water for mixing, natural coarse aggregate and natural fine aggregate; the adding weight of the coal gangue raw material is smaller than or equal to 30 percent of total weight of the coal gangue concrete. The preparation method comprises the following steps: crushing, flushing and drying coal gangue to obtain sediment and the coal gangue aggregate and treating the sediment to prepare the admixture; mixing part of raw materials according to mixture ratio and carrying out primary stirring to form a primary stirring material; adding corresponding materials into the primary stirring material and carrying out secondary stirring to obtain the coal gangue concrete. The coal gangue does not need to be broken for multiple times, so that the preparation method has the advantages of environment friendliness, high efficiency, facilitation for industrial production and capability of saving a large amount of energy; the prepared coal gangue concrete has better mechanical properties and improvedworkability; in addition, the coal gangue concrete can be applied to the technical field of preparation of concrete-filled steel tubular members.

Description

Technical field: [0001] The invention belongs to the technical field of building structures, and in particular relates to a coal gangue concrete and its preparation method and application. Background technique: [0002] my country is a large coal-burning country, and a large amount of coal gangue with low carbon content will be mixed in the coal mining process. This mixture of carbonaceous, argillaceous and sandy rocks has a low calorific value, is harder than coal, and has poor combustion performance. . At present, my country's accumulated coal gangue exceeds 1 billion tons, and 100 million tons of coal gangue are still discharged every year. Random piles of coal gangue occupy a large amount of land resources, and during the accumulation process, spontaneous combustion will occur, causing safety problems; as time accumulates, the sulfide escaped or leached will have extremely bad impact on the surrounding soil and groundwater. Threat to the normal life of nearby residents....

AI Technical Summary

Problems solved by technology

In order to achieve the particle size of coal gangue, it is necessary to crush the coal gangue many times. In this process, a lot of time and energy are spent, and more fine aggregate and fine powder components smaller than the particle size requirements are produced. These excess coal If the gangue components are not properly treated, it will also cause secondary pollution.

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