期刊
CEMENT & CONCRETE COMPOSITES
卷 72, 期 -, 页码 213-221出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2016.06.007
关键词
Thermal insulation; Mechanical strength; Calcined clay; Aerogel; Thermal conductivity; Smectite
资金
- Research Council of Norway
- SIN-TEF via research project the Concrete Innovation Centre (COIN)
- NTNU via research project Research Centre on Zero Emission Buildings (ZEB) [193830]
Partial replacement of ordinary Portland cement with calcined clay as binder in the aerogel incorporated mortars (AIM) was shown to decrease their thermal conductivities while maintaining the mechanical strength. It was found that at an aerogel loading of between 40 vol% and 80 vol%, replacement of cement with calcined clay lowered the thermal conductivity by up to 20% when <70 vol% aerogel was present (0.410 W/(mK) to 0370 W/(mK)), and by up to 40% with >70 vol% aerogel (0164 W/(mK) to 0.145 W/(mK)), driven mainly by the innate thermal conductivity of the binders. At replacement level of up to similar to 30% by weight of binder (%bwob), the properties of the mortar was independent of clay types. When the replacement increased to above 40%bwob, calcined smectite enriched clays were favoured for lowering the thermal conductivities of the mortars as compared to those containing kaolinite. (C) 2016 Elsevier Ltd. All rights reserved.
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