Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 94, Issue -, Pages 408-413Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2015.07.080
Keywords
Geopolymer; Recycled foam; Lightweight geopolymer concrete; Thermal conductivity
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Funding
- Higher Education Research Promotion and National Research University Project of Thailand
- Office of the Higher Education Commission through Advanced Functional Materials Cluster of Khon Kaen University
- Khon Kaen University
- Thailand Research Fund (TRF) under TRF Senior Research Scholar [RTA5780004]
- Siam Research and Innovation Co., Ltd.
- Dept. of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Isan Khon Kaen Campus
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In this research, the properties of lightweight geopolymer concretes containing recycled packaging foam were studied. The recycled foam was crushed to sizes of 235-4.75 mm and used as lightweight aggregate. Compressive strengths and densities with liquid alkaline/ash ratios of 0.5-1.0, sodium silicate/NaOH ratios of 0.33-3.0, NaOH concentrations of 5-15 molars, curing temperatures at 25 and 60 degrees C, and foam contents of 0.85-1.05 %wt. were tested. In addition, the thermal conductivities of geopolymer blocks were determined. Results showed that the lightweight geopolymer blocks of densities of 1000-1300 kg/m(3), with satisfactory strength and low thermal conductivity can be made. This gave a twofold advantageous viz, the use of low carbon footprint fly ash geopolymer and the reuse of packaging foam. (C) 2015 Elsevier Ltd. All rights reserved.
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