ASSESSMENT OF THE QUALITY OF SANDCRETE HOLLOW BLOCKS TOWARDS REDUCTION BUILDING COLLAPSE IN KADUNA STATE METROPLIS

Abstract

The paper assess the quality of sandcrete hollow blocks in some selected Local Government Area, (Igabi, Kaduna North, and Kaduna south) in Kaduna Metropolis. This is with the view of producing quality sandcrete hollow blocks in the Metropolis. Experimental research design was developed for the study. Twelve (12) sandcrete hollow blocks industries were used for the study using purposive sampling method for the selection. Samples of sand and sandcrete hollow blocks 450mmx225mm (6”) were obtained for laboratory tests on specific gravity and compressive strength analysis. Results obtained were compared with the standard set by the Nigeria Industrial Standard. The specific gravity of sand 2.5-2 and 28 days compressive strength of the 150mm sandcrete hollow blocks recorded average strength ranging from 1.84N/mm² - 1.9N/5mm². The compressive strength of the sandcrete hollow blocks was less than 2.0N/mm² in eleven (11) sandcrete hollow blocks industries and one (1) satisfied the NIS specification. The findings revealed among others that the mix ratio used by the sandcrete hollow blocks industries results to low quality blocks. The study therefore, recommended that the importance of adhering to the standard specifications should be emphasized and sticks penalties to melt out to erring producers by the Nigeria Industrial Standard Organization.