Rice Husk Ash Pozzolan as Valuable Supplement in Concrete for Industrial and Domestic Applications

Duke, A. E. and Eno, E. E. (2019) Rice Husk Ash Pozzolan as Valuable Supplement in Concrete for Industrial and Domestic Applications. Asian Journal of Physical and Chemical Sciences, 7 (1). pp. 1-7. ISSN 2456-7779

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Abstract

Controlled burning of rice husks at<700°C produced rice husk ash (RHA) which is predominantly amorphous silica (SiO2). RHA was used as a substitute for laterite and cement in proportions of 5%, 10%, 15%, 20%, 25% and 30% of concrete. The concrete was cured for 7 days, 14 days, 21 days, and 28 days respectively. It was observed that 20% of RHA provides the optimum strength. The effects of different particle sizes of 75, 150, 212, 300, 425 and 600 microns (µm) were tested using a compression test machine. A graph of average strength against particle size indicates 2.9 Nm-2 as the optimum strength at 75 µm and 1.2 Nm-2 as the minimum at 150 µm. From the ash size distribution, the presence of grains of several different sizes was observed. The grains were weighed using a weighing machine and a graph of particle size against percentage plotted to determine the particle size distribution. This showed that rice husk ash (RHA) is coarse grain material.

Item Type: Article
Subjects: Open Research Librarians > Physics and Astronomy
Depositing User: Unnamed user with email support@open.researchlibrarians.com
Date Deposited: 11 Apr 2023 07:41
Last Modified: 12 Apr 2024 08:48
URI: http://stm.e4journal.com/id/eprint/616

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