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

Feixu Chen; Yihe Zhang; Jingang Liu; Xinke Wang; Paul K. Chu; Bohua Chu; Na Zhang

doi:10.1016/j.conbuildmat.2020.118728

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

Feixu Chen, Yihe Zhang^*, Jingang Liu, Xinke Wang, Paul K. Chu, Bohua Chu, Na Zhang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

58 Citations (Scopus)

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.

Original language	English
Article number	118728
Journal	Construction and Building Materials
Volume	249
Online published	25 Mar 2020
DOIs	https://doi.org/10.1016/j.conbuildmat.2020.118728
Publication status	Published - 20 Jul 2020

Research Keywords

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

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10.1016/j.conbuildmat.2020.118728

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Cite this

@article{d04ca94eede64e72a82fac039def9ff0,

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

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.",

keywords = "Expanded perlite, Fly ash, Lightweight wall materials, Low thermal conductivity, SiO2 aerogel",

author = "Feixu Chen and Yihe Zhang and Jingang Liu and Xinke Wang and Chu, {Paul K.} and Bohua Chu and Na Zhang",

year = "2020",

month = jul,

day = "20",

doi = "10.1016/j.conbuildmat.2020.118728",

language = "English",

volume = "249",

journal = "Construction and Building Materials",

issn = "0950-0618",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Fly ash based lightweight wall materials incorporating expanded perlite/SiO2 aerogel composite

T2 - Towards low thermal conductivity

AU - Chen, Feixu

AU - Zhang, Yihe

AU - Liu, Jingang

AU - Wang, Xinke

AU - Chu, Paul K.

AU - Chu, Bohua

AU - Zhang, Na

PY - 2020/7/20

Y1 - 2020/7/20

N2 - 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.

AB - 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.

KW - Expanded perlite

KW - Fly ash

KW - Lightweight wall materials

KW - Low thermal conductivity

KW - SiO2 aerogel

UR - http://www.scopus.com/inward/record.url?scp=85082059677&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85082059677&origin=recordpage

U2 - 10.1016/j.conbuildmat.2020.118728

DO - 10.1016/j.conbuildmat.2020.118728

M3 - RGC 21 - Publication in refereed journal

SN - 0950-0618

VL - 249

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 118728

ER -