THE USE OF RICE HUSK POWDER IN COMPOSITES CEMENT SYSTEM
THE USE OF RICE HUSK POWDER IN COMPOSITES CEMENT SYSTEM
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Date
2013-03
Authors
BELLO, HADI IBRAHIM
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Abstract
High cost of cement has caused serious impact on housing delivery due to increase in
energy costs and high demand which attracted many research interests in sourcing other
alternatives cheaper materials. The use of rice husk powder in composites cement system
was investigated. Paste of neat and blended Portland cement with 5%, 10%. 15%, 20%,
25%, 30%, 35%, 40%, 45%, 50%, and 55% rice husk powder were cured in air under the
same temperature and humidity condition. Compressive strength of the various mix
proportions at 28 days were determined using standard compressive strengths testing
machine. The hydration products of the high percentage replacement composite cement
pastes were identified by x-ray diffraction analysis and compared with those made from
100% ordinary Portland cement pastes. Results indicate that only lower percentage
replacement level such as 5% and10% rice husk powder contained the required amounts
of silica which aided the hydration process producing samples with compressive
strengths of 19.72N/mm2 and11.57N/mm2when compared with control sample with
33.33N/mm2. However, result of the x-ray diffraction analysis showed that the observed
hydration products were mostly as expected due to the high replacement levels but the
degree to which crystal phases were identified in one of the samples was unusual. The
unusual behavior may be due to the fact that the calcium hydroxide initially formed was
consumed during the curing period confirming the important pozzolanic reactions of the
rice husk powder at such high replacement
Description
A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, ZARIA
NIGERIA
IN PARTIAL FULFILMENT FOR THE AWARD OF
MASTERS OF ART IN INDUSTRIAL DESIGN
DEPARTMENT OF INDUSTRIAL DESIGN
AHMADU BELLO UNIVERSITY, ZARIA.
NIGERIA
MARCH
Keywords
RICE HUSK,, POWDER,, COMPOSITES CEMENT,, SYSTEM.