Influence on the Performances of Foamed Concrete by Silica Aerogels
American Journal of Civil Engineering
Volume 3, Issue 5, September 2015, Pages: 183-188
Received: Dec. 2, 2015;
Published: Dec. 3, 2015
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Cheng Hai-li, College of Civil Engineering, North China University of Technology, Beijing, China
Yang Fei-hua, State Key Laboratory of Solid Waste Reuse for Building Materials (Beijing Building Materials Academy of Sciences Research), Beijing, China
Wang Yi, State Grid Yuyao Power Supply Company, Yuyao, China
Hao Li-wei, State Key Laboratory of Solid Waste Reuse for Building Materials (Beijing Building Materials Academy of Sciences Research), Beijing, China
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Aiming at the problems of organic thermal insulation material, SiO2 aerogel was mixed into foamed concrete in two different ways, to investigate its effects on thermal conductivity, compression strength and volume water absorption of foamed concrete. XRD, FT-IR and SEM have also been used to analyze the relationship between both the amount and the mixing way of aerogel and macro properties of foamed concrete. The results show that directly mixing aerogel into foamed concrete has limited effects on improving its performace, mixing 0.5% of aerogal has little effect on improving thermal conductivity, while mixing 2.5% of aerogel can greatly decrease compression strength though thermal conductivity has been improved. If aerogal has been premixed with glycol and hydroxypropyl methyl cellulose(HPMC) ether and then mixed into foamed concrete, the compression strength will decrease less while thermal conductivity could decrease by 35%, volume water absorption by 31%.
SiO2 Aerogel, Foamed Concrete, Thermal Conductivity, Compression Strength, Volume Water Absorption
To cite this article
Influence on the Performances of Foamed Concrete by Silica Aerogels, American Journal of Civil Engineering.
Vol. 3, No. 5,
2015, pp. 183-188.