Fly ash based lightweight wall materials incorporating expanded perlite/SiO2 aerogel composite : Towards low thermal conductivity

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

  • Feixu Chen
  • Yihe Zhang
  • Jingang Liu
  • Xinke Wang
  • Bohua Chu
  • Na Zhang

Detail(s)

Original languageEnglish
Article number118728
Journal / PublicationConstruction and Building Materials
Volume249
Online published25 Mar 2020
Publication statusPublished - 20 Jul 2020

Abstract

Fly ash based lightweight wall materials (LWM) incorporating expanded perlite (EP)/SiO2 aerogel composite were successfully prepared towards low thermal conductivity. As a functional padding, silica aerogel with density of 119 kg/m3 and thermal conductivity of 0.0277 W/(m·K) was synthesized by a two-step catalytic method and drying procedures under mild conditions. EP/SiO2 aerogel composite was further synthesized via impregnation method to load the SiO2 aerogel on the surface of EP. The bulk density and compressive strength of the prepared fly ash based LWM incorporating the optimized 20% EP/SiO2 aerogel composite reached 335 kg/m3 and 0.88 MPa, respectively, and the thermal conductivity was significantly reduced to 0.050 W/(m·K). Hence, the fly ash based LWM consisting of EP/SiO2 aerogel composite could be efficiently useful as building insulation thermal materials.

Research Area(s)

  • Expanded perlite, Fly ash, Lightweight wall materials, Low thermal conductivity, SiO2 aerogel

Citation Format(s)

Fly ash based lightweight wall materials incorporating expanded perlite/SiO2 aerogel composite : Towards low thermal conductivity. / Chen, Feixu; Zhang, Yihe; Liu, Jingang; Wang, Xinke; Chu, Paul K.; Chu, Bohua; Zhang, Na.

In: Construction and Building Materials, Vol. 249, 118728, 20.07.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal