Response Surface Methodology and Statistical Investigation of the Strength of Bituminous Sandcrete Blocks

Spalling is a serviceability related defect in buildings that degrades their appearance and if unchecked, could be threat to building sustainability lead structural failures. It associated with the effect of moisture on especially blockwall. This research focuses production low water-absorption Sandcrete blocks. The water absorption compressive strength blocks using bitumen as coat part sandcrete mix are investigated. In assessing outcome, eight (8) different sets varying contents were defined nine (9) samples standard six (6) inches produced for each set, three (3) per set being tested at 7,14 28 days respectively. sprinkling curing method was used 24 hours intervals. results acquired showed contained reduced rates up 4.06% relative control samples. analysis experimental result done response surface methodology, percentage replacement sand independent variable. Multiple regression equation obtained predict investigated properties. Further data shows coated externally give optimum performance terms absorption.