Authors : Sutas Janbuala and Thanakorn Wasanapiarnpong
Abstract: The objective of this study is the recycling of rice husk ash waste as an additive to improve the quality of clay bricks. The amount of rice husk ash waste added to lightweight clay brick was 10, 20, 30 and 40% by weight and the firing temperatures used were 700, 800, 900 and 1000°C. The results show that the addition of rice husk ash increases the porosity and water absorption and, in contrast, reduces the thermal conductivity and bulk density. An increase in firing temperature decreases the porosity and water absorption while yielding higher thermal conductivity and bulk density. Porosity and water absorption were maximized when the rice husk ash content was 40% and the firing temperature was 700°C. Clay brick with the addition of 10, 20 and 30% of rice husk ash and with a firing temperature from 800-1000°C exhibited the density and compressive strength required by the industrial standards of lightweight brick TIS 2601-2013. The addition of 20% of rice husk ash with a firing temperature of 1000°C resulted in the best properties with the sample having a bulk density of 1.42 gcm–3, a compressive strength of 10.11 MPa, a thermal conductivity of 0.46 W/mK and a porosity of 35.81%.
Sutas Janbuala and Thanakorn Wasanapiarnpong, 2016. Recycling Rice Husk Ash Waste for Clay Bricks. Journal of Engineering and Applied Sciences, 11: 2656-2661.