Wall surface heat insulating meterial

Abstract

An insulating material for wall surface is prepared from the basic material which is light calcium carbonate particles coated by stearic acid, expanded pearlite, silicate cement, polyvinyl alcohol adhesive, carboxymethyl cellulose, Na-base bentone and polypropylene fibres. Its advantages are high mechanical performance, less deformation and high insulating effect.

Description

technical field [0001] The invention relates to an energy-saving building material, in particular to a wall heat insulation material mainly used for the inner and outer sides of building enclosure structures. Background technique [0002] At present, most of the internal and external walls of building envelopes in my country still use ordinary cement mortar that has been used for many years. The thermal conductivity of this ordinary cement mortar layer is very high, and the function of preventing heat transfer is very poor. Areas with large temperature differences often consume a lot of energy due to frequent heat exchange between hot and cold air. In order to solve the above problems, people try to add a certain amount of polystyrene or other plastic material particles to the ordinary cement mortar, hoping to meet the requirements of the wall surface, especially the external wall surface, through the heat resistance characteristics of the polystyrene or pl...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the internal and external walls of building envelopes in my country still use ordinary cement mortar that has been used for many years. The thermal conductivity of this ordinary cement mortar layer is very high, and the function of preventing heat transfer is very poor. Areas with large temperature differences often consume a lot of energy due to frequent heat exchange between hot and cold air

In order to solve the above problems, people try to add a certain amount of polystyrene or other plastic material particles to the ordinary cement mortar, hoping to meet the requirements of the wall surface, especially the external wall surface, through the heat resistance characteristics of the polystyrene or plastic particles. thermal insulation requirements, but this improved wall mortar material still has the following defects: First, the density of the mortar sheath is still too high, and the corresponding thermal conductivity is as high as 0.29w / m·k, making its insulation The thermal insulation effect is not ideal; secondly, the mortar component has a certain hydrophilic property, and its waterproof and moisture-proof performance is poor. Once it encounters rain, snow or humidity, its thermal insulation ability will drop sharply; Third, the polystyrene and other particles mixed in the mortar component disperse the bonding performance of the cement slurry and the bonding force with the wall, reducing its compressive strength and shrinkage resistance. After a long time, it will not be able to resist the deformation of the wall and the cracks caused by the shrinkage of the mortar itself, which will greatly reduce its thermal insulation effect

In short, the existing wall enclosure materials are difficult to meet the satisfactory building energy-saving standards stipulated by the state