A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rice Husk Ash as a Silica Source in a Geopolymer Formulation
This study investigates whether South Korean rice husk ash (RHA) can be an alternative silica source in the geopolymer formulation by comparing the flexural strength between pure and rice husk mixed SiO2 sources. The optimal calcination temperature was investigated in terms of the amount (wt. %) of silica from RHA. The property of rice husks varies since it depends on geographical and climatic condition. Human beings can only use endosperm (seed) part of rice as a food source, therefore the husk becomes a natural waste. Thus, using the rice husk as an engineering material has advantages such as low cost, wide availability, and bio degradability. Rice husk ash (RHA) is about 16% by weight of rice husk when burnt in. All RHAs obtained in this experiment contain only amorphous silica. The optimal calcination temperature is determined to be 650 °C. The highest flexural stress (7.43 MPa) at 25% RHA and average stress were obtained to be 6.99 MPa. In conclusion, RHA silica can replace fume silica as a silica source in the geopolymer since the stress differences between those samples were less than 1.1 MPa.
Rice Husk Ash as a Silica Source in a Geopolymer Formulation
This study investigates whether South Korean rice husk ash (RHA) can be an alternative silica source in the geopolymer formulation by comparing the flexural strength between pure and rice husk mixed SiO2 sources. The optimal calcination temperature was investigated in terms of the amount (wt. %) of silica from RHA. The property of rice husks varies since it depends on geographical and climatic condition. Human beings can only use endosperm (seed) part of rice as a food source, therefore the husk becomes a natural waste. Thus, using the rice husk as an engineering material has advantages such as low cost, wide availability, and bio degradability. Rice husk ash (RHA) is about 16% by weight of rice husk when burnt in. All RHAs obtained in this experiment contain only amorphous silica. The optimal calcination temperature is determined to be 650 °C. The highest flexural stress (7.43 MPa) at 25% RHA and average stress were obtained to be 6.99 MPa. In conclusion, RHA silica can replace fume silica as a silica source in the geopolymer since the stress differences between those samples were less than 1.1 MPa.
Rice Husk Ash as a Silica Source in a Geopolymer Formulation
Kriven, Waltraud M. (editor) / Zhu, Dongming (editor) / Moon, Kyoung II (editor) / Hwang, Taejin (editor) / Wang, Jingyang (editor) / Lewinsohn, Charles (editor) / Zhou, Yanchun (editor) / Heo, Un Haeng (author) / Sankar, Kaushik (author) / Kriven, Waltraud M. (author)
2014-12-19
15 pages
Article/Chapter (Book)
Electronic Resource
English
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