Paper Title
Bottom Ash based Geopolymer Concrete Paver Blocks

A study on bottom ash based geopolymer concrete (BAGPC) for paver block was attempted in the present work. Bottom ash was used as the source material. The alkaline liquid was a combination of sodium silicate and sodium hydroxide. Optimum mix design for M30, M35, M40, M50 and M55 grade were arrived based on alkaline liquid to solids ratio, molarity of sodium hydroxide and curing mode. Properties such as compressive strength, split tensile strength, flexural strength, water absorption and abrasion resistance of BAGPC paver block was determined. Further, durability studies on bottom ash geopolymer mortar were carried out against chemical resistance. The results showed that lower grade BAGPC paver block had attained required strength at the age of 3 days under ambient curing mode while higher grade BAGPC paver block achieved at the age of 28 days under heat curing mode. The water absorption of BAGPC paver block was lower for all the grades. It was also found that BAGPC paver block had excellent resistance against abrasion and chemical environment. Index Terms— bottom ash, geopolymer concrete, paver blocks, abrasion resistance, chemical resistance