Thermal properties of novel binary geopolymers based on metakaolin and alternative silica sources
作者： Mónica A Villaquirán-Caicedo , Ruby Mejía de Gutiérrez , Soumitra Sulekar , Calvin Davis , Juan C Nino
DOI: 10.1016/J.CLAY.2015.10.005
关键词:
摘要: Abstract The objective of this study was to evaluate the thermal properties geopolymers based on metakaolin (MK) and alternative silica-based activators. These activators were produced by mixing rice husk ash (RHA) silica fume (SF) with potassium hydroxide (KOH). In addition, boiler slag (BS) used as partial substitute for MK aluminosilicates precursor. thermo-physical prepared compared activated commercial silicate (KS). general, conductivity, diffusivity specific heat are related porosity geopolymer. values conductivity between 0.170–0.353 W/m·K. coefficient expansion varies 1.06 1.13 × 10 − 4 K − 1 0.16–0.27 mm 2 /s. geopolymer RHA (G-RHA) showed low bulk density (1338 kg/m 3 ) high (35%). Additionally material has lowest (0.17 W/m·K) (0.16 mm /s). results obtained show that here developed can be considered potentially useful applications such insulation. they constitute a better ecological choice because type source alkaline activator making their production environmentally friendly.
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