Calcining-free energy-saving and heat-insulating brick of desulfurized gypsum and building waste

Abstract

The invention discloses a calcining-free energy-saving and heat-insulating brick of desulfurized gypsum and building waste, belonging to the production field of building material. The calcining-free energy-saving and heat-insulating brick of desulfurized gypsum and building waste comprises raw materials in the following ratio: 40-55 parts of desulfurized gypsum, 35-55 parts of building waste, 10-17 parts of No. 32.5 cement, 7-14 parts of sodium hexafluorisilicate, 7-8 parts of closed cell perlite, 6-9 parts of sodium silicate, 1-2 parts of coagulation accelerator and 0.08-0.15 parts of aluminium silicate fibres. In the calcining-free energy-saving and heat-insulating brick of desulfurized gypsum and building waste disclosed by the invention, desulfurized gypsum and building waste are adequately utilized, as well as secondary energy consumption and secondary pollution are reduced. The product has the advantages of being high in compressive strength and flexural strength, low in thermal conductivity, good in water resistance, small in drying shrinkage value, good in heat-insulating performance and the like, as well as is suitable for civil houses, common residential buildings, household splitting walls, partition walls and filling walls.

Description

technical field [0001] The invention relates to a building brick, in particular to a non-calcining desulfurized gypsum and construction waste energy-saving and heat-preserving brick. Background technique [0002] As the state mandated wet desulfurization of thermal power plants, desulfurization gypsum was subsequently derived. It is the imprint of the times, and it is the solid waste after desulfurization in thermal power plants. At present, the annual discharge of desulfurized gypsum in the country has reached 50 million tons, and there is an increasing trend, and the utilization rate has only reached 56%. If it is not properly utilized, its stockpiling will not only take up a lot of land, but also cause waste and secondary pollution. In addition, with the rapid development of industrial and agricultural production, people's living standards continue to improve, which promotes the consumption of various material products and produces a large amount of waste. For example, ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a non-calcined desulfurized gypsum and construction waste energy-saving insulation brick, which has low energy consumption, low cost, simple production process, high compressive strength, high flexural strength, low thermal conductivity, good water resistance, and low drying shrinkage. Small value, excellent thermal insulation performance, solve the problems of coal-fired power plant flue gas desulfurization gypsum and construction waste occupying land and polluting the environment

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