Authors
Hui Cheng, Kae-Long Lin, Rong Cui, Chao-Lung Hwang, Yu-Min Chang, Ta-Wui Cheng
Publication date
2015/10/1
Journal
Construction and Building Materials
Volume
95
Pages
710-720
Publisher
Elsevier
Description
Geopolymers, which are a new form of aluminosilicates, are environmentally friendly materials that exhibit high mechanical strength. Waste catalysts that contain a large amount of amorphous SiO2 and Al2O3 are highly soluble in alkaline solutions. This study investigated the effects of the SiO2/Na2O ratio (S/N) and various levels of waste-catalyst replacement on the properties of waste-catalyst metakaolin-based geopolymers (WCMBGs). The mechanical and microstructural properties of the materials were studied by performing compressive strength testing, porosity analysis, thermogravimetric analysis, 29Si magic-angle spinning nuclear magnetic resonance (29Si MAX NMR) spectroscopy, and scanning electron microscopy. When S/N was 1.93, WCMBGs containing 10% of the waste catalyst exhibited high compressive strength and low porosity. Thermogravimetric analysis indicated that the weight loss of the …
Total citations
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Scholar articles
H Cheng, KL Lin, R Cui, CL Hwang, YM Chang… - Construction and Building Materials, 2015