Open AccessCompressive strength and thermal conductivity of metakaolin geopolymers with anisotropic insulations
Author(s) -
Nur Ain Jaya,
Liew Yun-Ming,
Mohd Mustafa Al Bakri Abdullah,
Hussin Kamarudin,
Heah Cheng-Yong,
Ridho Bayuaji,
Muhammad Faheem Mohd Tahir
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/743/1/012005
Subject(s) - metakaolin , materials science , geopolymer , composite material , compressive strength , thermal conductivity , sodium silicate , thermal insulation , sodium hydroxide , chemical engineering , layer (electronics) , engineering
This research investigated the properties of thermally insulating geopolymer prepared using waste filler (fibreboard and rubber) to act as anisotropic pore/insulation. The geopolymer matrix was synthesised using metakaolin and an alkaline solution consists of sodium hydroxide solution and sodium silicate mixture. Geopolymers with varying content (0, 3, 5 and 7 layers) of coin-shaped fibreboard and expanded polystyrene are produced to examine the anisotropic insulation effect on the material characteristics. The compressive strength and thermal conductivity were determined experimentally. From the results, it is proved that the use of anisotropic insulations can improve the thermal conductivity and minimizing the reduction of compressive strength. Geopolymer incorporated with fibreboard had better performance in terms of strength while geopolymer incorporated with rubber had better thermal conductivity.