A kind of production method of fly ash aerated concrete block sprayed with waterproofing agent on the surface

Abstract

The invention discloses a production method of a coal ash aerated concrete block with a waterproof agent sprayed on the surface. The production method includes that coal ash is adopted as a main framework material of the aerated concrete block, and power plant furnace slag, a water reducer and the waterproof agent are added, so that water consumption and water-material ratio are lowered, uniformity and compactness of the inside of aerated concrete are improved, capillary porosity is reduced, pore walls are more compact, pouring rest time is shortened, and strength is improved; a silane waterproof agent is added internally, so that water adsorption rate is lowered, antifreezing performance is improved, and inside structure of aerated concrete is more compact; a layer of waterproof liquid issprayed to the surface of the aerated concrete block after autoclaved curing and permeates into bricks to chemically react with a lot of free alkaline substances inside concrete to generate stable tendril crystal glue to become a part of the concrete, so that capillaries are closed and reduced, compactness of the concrete is improved, and damaging and corroding effect of the concrete is reduced.

Description

technical field [0001] The invention relates to the technical field of aerated bricks, in particular to a production method of a fly ash aerated concrete block whose surface is sprayed with a waterproofing agent. Background technique [0002] Air-entrained brick is aerated concrete block, which is a new type of wall material with the best combination of resources, performance and cost. Its porosity can usually reach 40%-85%, and its density is 300-1800 kg / m3, which is energy-saving. , comprehensive utilization of resources, recycling and other advantages, the most prominent advantage of which is energy saving. The autoclaved aerated concrete with a thickness of 300 mm and a density of 500 kg / m3 has met the requirements for the heat transfer coefficient of walls in the 65% energy-saving standard in cold regions of my country. But as far as the application status is concerned, air-entrained concrete is only used as the filling material of the inner enclosure structure, and it...

AI Technical Summary

Problems solved by technology

Air-entrained concrete has strong water absorption, which can easily lead to common problems such as masonry strength, frost resistance, thermal insulation performance reduction, and wall cracking. Therefore, how to improve the water resistance of air-entrained concrete is the key to improving the quality of air-entrained concrete blocks.