The partial replacement of ordinary portland cement with rice husk ash to stabilize compressed earth blocks for affordable building materials

Ojerinde, Adedamola M., Ajao, Adekunle M., Ogunbayo, Babatunde F., Stevenson, Vicki and Latif, Eshrar 2018. The partial replacement of ordinary portland cement with rice husk ash to stabilize compressed earth blocks for affordable building materials. Presented at: PLEA 2018: Smart and healthy within the two-degree limit, Hong Kong, China, 10-12 Dec 2018. Published in: Ng, Edward, Fong, Square and Ren, Chao eds. PLEA 2018 - 34th International Conference on Passive and Low Energy Architecture. The Chinese University of Hong Kong, pp. 321-325.

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Abstract

The study investigated potentials of rice husk ash as a replacement for Ordinary Portland Cement in the production of Compressed Earth Block (CEB) with a view to reducing building construction cost and the embodied energy of the blocks in the context of Nigeria. Graded levels (i.e. 10, 20, 30 and 40%) of RHA replaced cement in the mix for CEB moulding. The results of X-ray diffraction showed that RHA contained 80% SiO2. Also, the results of the compressive strength, water absorption capacity, and bulk density testing indicated that low compressive strength, high water absorption capacity, and low bulk density exhibited by RHA-CEB make doubtful the suitability of RHA as a partial replacement for Ordinary Portland cement in the building construction in the wet regions. However, RHA could find useful application as a stabilizing agent in CEB rather than as a partial replacement of cement.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Completion
Status:	Published
Schools:	Architecture
Subjects:	T Technology > TH Building construction
Publisher:	The Chinese University of Hong Kong
ISBN:	9789628272365
Date of First Compliant Deposit:	6 February 2019
Last Modified:	28 Apr 2020 13:41
URI:	http://orca.cf.ac.uk/id/eprint/119235

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