Interrelationship of Kaolin, Alkaline Liquid Ratio and Strength of Kaolin Geopolymer

International Conference on Innovative Research - ICIR Euroinvent 2016

Ramasamy, Shamala^1 ; Hussin, Kamarudin^1,2 ; Abdullah, Mohd Mustafa Al Bakri^1,2 ; Ghazali, Che Mohd Ruzaidi^1,2 ; Binhussain, Mohammed^3 ; Sandu, Andrei Victor^4

Center of Excellence Geopolymer and Green Technology, School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), D/A Pejabat Pos Besar, Kangar, Perlis

01007, Malaysia^1

Faculty of Engineering Technology, Universiti Malaysia Perlis (UniMAP), D/A Pejabat Pos Besar, Kangar, Perlis

01007, Malaysia^2

King Abdul Aziz City Science and Technology (KACST), P.O. Box 6086, Riyadh

11442, Saudi Arabia^3

Faculty of Materials Science and Engineering, Gheorge Asachi Technical University of Iasi, Blvd. D. Mangeron 71, Iasi

700050, Romania^4

关键词: Alkaline activators;    Cementitious materials;    Geopolymer materials;    Micro-structural;    Solid-to-liquid ratio;    Solid/liquid;    Wood substrates;    X-ray diffraction tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/133/1/012004/pdf
DOI  :  10.1088/1757-899X/133/1/012004

来源: IOP

【 摘 要 】

Geopolymer is an incredible alternative green cementitious material which has ceramic-like properties, but does not require calcining that leads to reduction in processing energy usage. The purpose of this research is to study the correlation between kaolin: liquid ratio with the performance of kaolin geopolymer. Kaolin, a prominent raw geopolymer material was used to prepare enhanced geopolymer paste by mixing with alkaline activator solution. Interrelationship of kaolin to alkaline liquid ratio with hardness and flexural strength was the focus of this work. Therefore kaolin geopolymer paste with varying solid to liquid ratio ranging from 0.7 to 1.1 was prepared. Geopolymer paste was coated on low grade wood substrate prior to Vickers hardness and flexural strength. X-ray diffraction was conducted on geopolymer paste itself after 7 days to analyze the change in phase identification at early age. Kaolin geopolymer coating on wood with solid/liquid(S/L) ratio of 0.7 shows the most promising hardness and flexural strength of 15.3 Hv and 94.73MPa. X-ray diffraction test showed high existence of kaolinite on higher S/L ratio where as sodalite was observed in S/L ratio of 0.7. Microstructural studies also compliments our finding which further proves the positive dependency of S/L ratio and kaolin geopolymer strength.