Study On The Preparation And Performance Of Inorganic Thermal Insulation Glazed Hollow Bead Material

Since the year of 2007 when the government required that all new buildings must be installed with external wall insulation, there are happening lots of fire disasters resulted from thermal insulation materials. The reason is that we use too much organic insulation materials in our country like EPS and XPS. These materials could be melting down with transformation and dripping just at a low burning temperature which generated a large number of poisonous gases. However, the Inorganic heat preservation materials have better advantages than organic insulation materials in terms of fireproofing, durability and environmental protection etc. Therefore it can be widely used in the construction field. The research of inorganic thermal preservation material is just beginning with a broad prospect. This article starts from the requirement of fire protection and energy saving and put forward to develop high compression strength, low thermal conductivity, and nonflammable, low cost, environment friendly inorganic heat preservation material. Based on the theory of heat preservation and heat insulation and combined with the specific experimental research, the durable tolerance and heat conductivity coefficient of glass bead inorganic heat preservation material is made out. Please see the main work as follows:First, the basic principle of maintenance structure and heat preservation and insulation was introduced in this paper, and the theory of internal heat transfer of porous thermal insulation material and utilization channel were researched. All those work laid a theoretical foundation for the research work.Then inorganic heat preservation material was produced by using the aggregate of glazed hollow bead, the gel material of aluminium dihydrogen phosphate and the anti-cracking of fiberglass. Then it carried out the study about the different binder content, heating temperature affecting the thermal insulation material bulk density, porosity, compression strength and the influence of coefficient of thermal conductivity. Scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) were used to process microanalysis and characterization on the surface morphology and the designated area element. The discussion about the mechanism of the microstructure on the insulation performance was also carried out here. The change rule for each index was obtained by using the orthogonal test and changing the components of the glazed hollow bead heat preservation material. A conclusion that each element had a significant influence on thermal insulation material was put forward.Next, more economic material of sodium silicate was used to replace aluminium dihydrogen phosphate as gel material to make insulation materials. Physical and chemical modification methods were respectively used to improve the efficiency of sodium silicate coherence. Through comparative study, it was concluded the effect law that the different methods and different factors differed from performance of heat preservation material. The highest increase of water glass cementation power reaches 20.1%by chemical modification, while 34,2%by physical modification.At last, the study on the fireproofing and anti-flaming ability of glazed hollow bead thermal insulation material was implemented according to relevant national standards, which was verified the flammability was class Al level.