Study On Properties Of Aerogel Insulation Mortar

In today's rapid economic development,the demand for energy is increasing.But the energy utilization rate is low,the phenomenon of energy waste is very serious.The building energy consumption as a major part of the total social energy consumption,the proportion of the total social energy consumption accounts for about1/3.Therefore to improve building energy efficiency level,to improve energy efficiency and conservation energy is very important in building energy saving,envelope insulation plays an important role in reducing building energy consumption.Therefore improve the insulation performance of building envelope is the key.At present,materials including organic and inorganic insulation materials,two kinds of commonly used external wall insulation.Organic insulation materials including extruded polystyrene board,polystyrene board,spraying polyurethane and polystyrene particles;inorganic insulation material comprises expanded perlite,glass beads,rock wool.Although the organic insulation materials of good insulation effect,but flammable;and inorganic insulation insulation performance is relatively poor.Our study is to improve this phenomenon.Our project uses Portland cement as the main cementing material,aerogel and glass beads as the aggregate.This makes the thermal insulation mortar porosity and pore size decreased,reduce the hole convection.As a result thermal conductivity decreased.At the same time with the amount of fly ash,fiber,cellulose ether,wood fiber and latex powder can improve the mechanical properties and work of mortar.The ratio of thermal conductivity,tensile strength,compressive strength and other performance were studied,these performances is better than first grade insulation mortar in national standard GB/T 20473.To test the technical indicators of thermal insulation mortar: 1.dry apparent density of 241.4kg/m3;2.low thermal conductivity to 0.052W/(M-K),the thermal conductivity is lower than the market of similar products and meet the requirement of the national standard;the 3.compressive strength of 0.52 MPa,meet the national standard 0.20 MPa requirements;4.linear shrinkage rate was 0.157%,better than0.3% standard requirements;5.shear bond strength was 80 Kpa,50Kpa higher than the standard requirements.Thermal conductivity is one of the important properties of thermal insulation mortar evaluation index,analyzes the factors affecting the thermal conductivity of insulation mortar,including dry density,test temperature and internal structure.Through the simulation analysis of actual software of aerogel heat insulation and thermal insulation mortar thermal insulation glazed hollow bead mortar.And the design of the simulation device of wall insulation.Simulation of thermal insulation performance of the actual construction process of the thermal insulation mortar system,compared with the simulation results.The aerogel insulation mortar system and comprehensive energy consumption of glazed hollow bead insulation mortar system was analyzed.By simulating the actual buildings in different insulation system of building energy consumption index,get the superiority of aerogel insulation mortar system.Calculation shows that the energy consumption index of aerogel insulation mortar meet China's ?civil building energy saving design standard(heating residential)?(JGJ26-95)regulations.The aerogel insulation mortar system with glazed hollow bead insulation mortar system were compared.The economic cost analysis found that although the initial cost of the aerogel insulation mortar system is higher than that of glazed hollow bead insulation mortar system,but considering the insulation properties of aerogel insulation mortar and it brings economic and environmental benefits,there are still some of the market prospects.