Assessment of Sandcrete Blocks Manufacturers 'Compliance to Minimum Standard Requirements by Standard Organisation of Nigeria in Southwest, Nigeria

摘要

Intensive use of sandcrete hollow blocks in building production has made it essential building materials in Construction Industries. This necessary need has made Sandcrete hollow blocks 'Manufacturers to play pranks in the Minimum Standard Requirement. This paper assesses the compliance level of Sandcrete Block Manufacturers to Minimum Standard Requirement in Southwest, Nigeria. 54 sandcrete blocks comprising 225 mm and 150 mm were gotten from blocks production sites within three states; Oyo, Ondo, and Lagos State. Samples of their fine aggregates were gotten for proper examination. In order to compare the outcome of the test results with standards, 18 numbers of controlled experimental units which comprised 225 mm and 150 mm were also produced. The results for sieve analysis of the three Samples gotten from South West along with Laboratory sample satisfied the requirement for BS 882:1992[1]. The results of compressive strength values gotten from blocks suppliers within South West failed to meet up the requirements stipulated for load bearing sandcrete blocks by Nigerian Industrial Standard (NIS 87: 2000)[2]. And also indicated shoddy control practice because strength results justified low standards and due to non-adherence to stipulated mix-design (1;8) of (cement and sand).