Reassessment of the Quality of Sandcrete and Concrete Hollow Blocks produced in Ado-Ekiti Metropolis

John - Wasiu

Abstract


This research is a laboratory test-focused on determining the compressive strength, impact strength and water absorption of controlled concrete and sandcrete blocks and that collected from different block industries within the Ado-Ekiti Metropolis. Infrastructural failure across the Nation has necessitated a prompt solution to problems in the building industry. Experimental tests were carried out on controlled sancrete (SHB), concrete block (CHB) and those collected from five different locations in Ado-Ekiti. The results revealed poor average compressive strength for samples collected (both 9 and 6 inches) and ranging from 0.33-1.5 N/mm2 for 9 inch and 0.36-1.27 N/mm2 for the 6-inch block. These range are below the minimum requirements of NIS 87:2007 standard which specifies 2.5-3.45 N/mm2. The controlled samples of SHB and CHB yielded a good strength, low water absorption and a higher impact resistance compared to the samples collected. It was concluded that Federal Government should encourage the use concrete blocks through public awareness while empowering NIS and SON to sanction block industries who want to contribute to infrastructural damage due to non-compliance with code and specification of the manufacturing of sancrete block.

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