Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6718241 | Construction and Building Materials | 2016 | 8 Pages |
Abstract
SiO2 aerogel is a solid material with three-dimensional network structure, has a very low density and low thermal conductivity, can be used as a kind of high efficient heat preservation and heat insulation material, as well as SiO2 aerogel particles. In this work, we have successfully prepared a mortar with SiO2 aerogel particles. Density, mechanical properties, softening coefficient, autogenous shrinkage, antifreeze performance and thermal conductivity properties were studied when the SiO2 aerogel particles replacement ratio was 10%, 20%, 30%, 40%, 50% and 60%. The mortar based on SiO2 aerogel particles shows a density of â¼1.2 g/cm3, a compressive strength and flexural tensile strength of â¼2.15 MPa and â¼0.45 MPa, a thermal conductivity of â¼0.1524 W/m·K at the aerogel content of 60 vol.%. And on this basis, the thermal conductivity was focused on study when fiber, air-entraining agent and powder were added into the mortar. The results show that when the dosage was 0.2%, 0.05% and 1% respectively, the thermal conductivity was the lowest (0.0859 W/m·K).
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Authors
Zhao-hui Liu, Yi-dong Ding, Fei Wang, Zhi-ping Deng,