Application of Compliance to Cost Ratio (C-Cr) analysis in the Determination of Optimum Mix for Insulating Bricks

In order to determine optimum mix proportion of waste glass (WG) and wood saw dust (WSD) in fired bricks, suitable for housing construction, this study applied compliance to cost ratio (C-CR) analysis in evaluating properties of fired ceramic bricks mixed with varied proportion of waste glass (WG) and wood saw dust (WSD). Fired clay brick samples which contained varied proportion of waste glass (WG) and wood saw dust (WSD) were examined for physical, mechanical, and thermal properties in line with stipulated standard procedures. The values of the properties of each sample were compared with values stipulated in various existing standards and property evaluation index, compliance Level and Compliance to Cost Ratio (C-CR) were utilized in analyzing the results of properties obtained. From the outcome, it was observed that with increasing WG content in brick samples, compliance level with existing standards increased. Also, cost ratio and experimental cost of each brick sample trended upward. Brick sample with mix proportion of 20 wt % WG, 5 wt % WSD and 75 wt % clay had compliance level of 94 % and highest Compliance to Cost Ratio index of 7.81, hence selected as optimum mix proportion for masonry bricks.