During the construction process, should be based on the requirements of design drawings to determine the structure of the external retaining insulation material. Various types of insulation material shall be factory certification test report or related indicators. When there is no factory certificate or test report should be random testing, the related indicators should meet the requirements.
As China‘s building energy efficiency work in-depth development, emerging a number of varieties of thermal insulation material, because of its energy-saving insulation and other reasons, a number of thermal insulation materials have been gradually eliminated by the market. Select the appropriate thermal insulation material is not only to achieve the purpose of energy-saving insulation, but also to extend the life of the building, contrary to influence and even shorten the life of the building.
According to thermal insulation material in the envelope structure, the use of different parts, is divided into interior and exterior wall thermal insulation materials, insulation materials; according to the state of energy-saving insulation material divided into plates (solid) thermal insulation material and slurry thermal insulation materials.
Plate heat insulation materials
Sheet insulation material, the use of relatively wide range of areas and can be used in the outer wall insulation works, you can also use the outer wall insulation works. Thermal insulation materials, insulation sheet main body can be polystyrene foam board, extruded polystyrene board, rock wool board, glass wool panels of different materials. Plate heat insulation materials can be divided into single-insulation materials, thermal insulation materials and systems, in the application process should be aware of the following questions:
A: single-insulating material:
Is the main body of thermal insulation engineering applications in the use of other materials needed in the process of co-ordination. Such as: foam polystyrene board, extruded polystyrene board, rock wool board, glass wool board, etc., should be tested before use the contents of the following test:
1, thermal conductivity (W / m? K): This indicator is the relationship between technology, engineering thermal effect of key indicators, in general, laboratory test is drying to constant weight at the plate when the test, while the material applications contains some moisture in the air under the conditions used, therefore, used to be multiplied by a certain factor; or directly adjusted to the use of the material tested under environmental conditions.
2, apparent density (Kg/m3): apparent density of the material to a certain extent, affect its thermal conductivity, and the apparent density of substandard materials will be a direct result of their physical performance degradation, such as strength, size stability.
3, compressive strength (MPa): refers to the 10% deformed specimens under compressive stress. It is closely related to the surface layer of the system durability and impact resistance.
4, size, rate of change (mm): Large size of the material rate of change will lead to cracking of the surface layer of the system.
5, water vapor permeability coefficient [ng / (Pa? M? S)]: The performance of the decision through the performance of water vapor, to a certain extent, determines whether or not the wall of the condensation.
6, oxygen index: need flame-retardant, or fire can not be compliance.