What are the features and capabilities of GRC components?
From the material composition, the thermal conductivity is less than the general organic polymer inorganic non-metallic materials; thermal conductivity is smaller than that of the metal material; thermal conductivity of gaseous substances less than liquid substance, liquid solid material is less than. Therefore, the organic polymer material or amorphous inorganic material should be used as far as conditions permit, which is beneficial to thermal insulation. From the point of view of the material structure, when the apparent density of the material decreases, the porosity increases, and the pore inside the material is a large number of enclosed micro holes, the thermal conductivity of the material is relatively small. For foam plastics, the best apparent density is 16~40kg/m3 to meet the requirements of thermal insulation materials. Due to the existence of pores in the material in a humid environment, will inevitably be water, water and thermal conductivity (0.5815W/m - K) than ofstandstill air (0.0233W/m - K) is much larger, therefore, when the humidity increases, the equilibrium moisture content of materials increased, the thermal conductivity of materials will decrease. Therefore, as a thermal insulation material, the moisture absorption rate of the material itself should be as low as possible. If it is unavoidable, the material should be treated with water repellent or coated with waterproof material.
Exterior wall insulation is mainly based on thermal insulation materials as building envelope, and the development and application of efficient insulation materials is an effective measure to ensure building energy efficiency. At present, all developed countries in the world pay great attention to the production and application of thermal insulation materials. The construction of energy-saving work is well done, and they attach importance to and develop insulation materials are inseparable. 2.1, insulation properties of insulation is to maximize the transmission of heat resistance, and therefore requires insulation materials must have large thermal resistance and small thermal conductivity.
Exterior wall insulation energy-saving materials, energy-saving materials are thermal insulation materials. An insulating material is a material or material complex used for building enclosure or thermal equipment, and for the transmission of an impedance heat flux. It includes both thermal insulation materials and cold protection materials. The significance of heat insulation material is to satisfy the thermal environment of building space or thermal equipment, and to save energy. With the worldwide energy shortage day by day, the significance of heat insulation materials in energy saving is becoming more and more prominent. As far as the heating of ordinary residents is concerned, the use of thermal insulation materials can save energy on the existing foundation 50%~80%. According to the energy saving practice in Japan, 3 tons per year of standard coal can be saved by using 1 tons of heat insulation material, and the energy saving benefit is 10 times of the material production cost. Therefore, some countries regard thermal insulation material as the fifth largest energy source after coal, oil, natural gas and nuclear power".
