Academic Journals Database
Disseminating quality controlled scientific knowledge

The Use of Rice Husk Ash in Low - Cost Sandcrete Block Production

ADD TO MY LIST
 
Author(s): E. B. OYETOLA | M. ABDULLAHI

Journal: Leonardo Electronic Journal of Practices and Technologies
ISSN 1583-1078

Volume: 5;
Issue: 8;
Start page: 58;
Date: 2006;
Original page

Keywords: Sandcrete Blocks | Ordinary Portland Cement (OPC) | Rice Husk Ash (RHA)

ABSTRACT
The compressive strength of some commercial sandcrete blocks in Minna, Nigeria was investigated. Rice Husk Ash (RHA) was prepared using Charcoal from burning firewood. Preliminary analysis of the Constituent materials of the ordinary Portland Cement (OPC) / Rice Husk Ash (RHA) hollow sandcrete blocks were conducted to confirm their suitability for block making. Physical test of the freshly prepared mix was also carried out. 150mm´450mm hollow sandcrete blocks were cast cured and crushed for 1, 3, 7, 14, 21, and 28 days at 0, 10, 20, 30, 40 and 50 percent replacement levels. Test results indicate that most commercial sandcrete blocks in Minna town are below standard. The compressive strength of the OPC/RHA sandcrete blocks increases with age at curing and decreases as the percentage of RHA content increases. The study arrived at an optimum replacement level of 20%