Thermal-insulating composite building coating for external wall and preparation method of coating

Abstract

The invention discloses a thermal-insulating composite building coating for an external wall and a preparation method of the coating. The coating is prepared from components in parts by mass as follows: 40-50 parts of expanded perlite, 8-12 parts of aragonite sand powder, 8-12 parts of liquid sodium silicate, 2-4 parts of liquid potassium silicate, 3-7 parts of silica sol, 3-7 parts of deionized water, 2-4 parts of liquid lithium silicate, 3-7 parts of inorganic acid, 3-5 parts of an expanding agent, 8-12 parts of plant fiber powder and 8-12 parts of water. The thermal-insulating composite building coating for the external wall has the characteristics of low preparation cost, good effect and environment friendliness; tests show that the thermal conduction coefficient of the composite coating is 0.117 W/(m*K), and the density is 700-800 kg/m<3>. The coating is suitable for external thermal-insulation plastering engineering and internal thermal-insulation plastering engineering of walls, built by using reinforced concrete, aerated concrete, laid bricks, sintered bricks, non-sintered bricks and the like, of multistory and high-rise buildings and is also suitable for thermal-insulation improvement engineering of various old buildings currently.

Description

technical field [0001] The invention relates to a thermal insulation building composite coating for exterior walls suitable for extremely cold regions and a preparation method thereof, which belongs to the technical field of building material preparation. Background technique [0002] Heating, air conditioning, lighting and household appliances in residential and public buildings consume one-third of the world's energy, mainly fossil energy. Fossil fuels, on the other hand, have taken the earth hundreds of millions of years to form and will be exhausted within a few generations. Therefore, building energy conservation is the rational use and effective utilization of energy in buildings, and the continuous improvement of energy utilization. In a sense, it is called "improving energy efficiency in buildings". In other words, it is not energy saving in a negative sense, but improving utilization efficiency in a positive sense. [0003] Cold winter and hot summer are the main...

AI Technical Summary

Problems solved by technology

However, the currently used building materials for thermal insulation and external wall insulation are not ideal in various properties, especially in terms of thermal insulation, weather resistance, acid and alkali resistance, etc., which cannot meet people's needs.

Exterior wall insulation materials in the prior art generally have hidden dangers such as high price, high thermal conductivity, high specific gravity, easy falling off, poor moisture resistance, etc., and the organic adhesive ingredients and pungent odor added in the processing of traditional insulation materials are easy to harm the human body. Adverse effects on health and the environment