Heat preservation and energy saving type lightweight, gas filled wall bricks, and preparation method

Abstract

This invention relates to a method for preparing heat-insulating and energy-saving lightweight aerated wall bricks, which are prepared from aggregate, gelation agent, aeration agent, heat-insulating material and water. The aggregate is composed of slag or river sand, glass microbeads, floating beads, closed perlite, and expanded perlite. The gelation agent is composed of cement, gypsum and lime. The aeration agent is Al powder. The fiber heat-insulating material is composed of high-Al powder, tripolite, ceramic fibers, mineral wool, sepiolite, expanded vermiculite, glass cotton and palygorskite. The wall bricks have such advantages as high compressive strength, low heat conductivity, high heat-insulating performance, high fireproof and damp-proof performances, rapid and convenient construction, and no need for composite heat-insulating layer.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a heat-preserving and energy-saving light-weight aerated wall brick for masonry walls and a preparation method thereof. Background technique [0002] With the enhancement of our country's awareness of land resources protection, red bricks, which were the main material of building insulation walls, were gradually replaced by concrete prefabricated blocks, and the walls made of cement, fine sand, and fly ash were autoclaved Because of its light weight and energy-saving effect, it is widely used than prefabricated blocks. At present, the aerated concrete wall bricks commonly used in the construction market, due to the large internal pores, high water absorption, moisture expansion, drying shrinkage, and loose surface, the surface of the wall bricks is prone to cracking, hollowing, or even falling off, and water seepage in the wall, etc. Phenomenon. In addition, the wall...

AI Technical Summary

Problems solved by technology

At present, the aerated concrete wall bricks commonly used in the construction market, due to the large internal pores, high water absorption, moisture expansion, drying shrinkage, and loose surface, the surface of the wall bricks is prone to cracking, hollowing, or even falling off, and water seepage in the wall, etc. Phenomenon

In addition, the wall brick has low strength and high thermal conductivity, generally between 0.20 and 0.30W / (m·k), and has poor thermal insulation, sound insulation, and fireproof performance. Therefore, it must be done on the outer wall of the wall. 2.5-4mm polystyrene stearin foam insulation layer or insulation layer of other insulation materials, which brings problems such as high insulation cost, complicated construction, poor durability of insulation layer, large amount of maintenance, and inconvenience of secondary decoration.

At present, although there are some improved technologies, their thermal insulation performance is not ideal, and the problems of cracking, loosening and falling off of the wall have not been fundamentally solved.