Evaluation on Scrap Glass Incorporated Geopolymer Interlocking Blocks

ABSTRACT

An effort has been made to produce economical and environmentally friendly geopolymer interlocking blocks by activating fly ash and ground granulated blast furnace slag (GGBS) with sodium hydroxides and silicates. Scrap glass and crushed stone sand are blended to produce fine aggregates. Seven mix ratios of crushed stone sand and scrap glass were used: S₀=100%:0% S₁= 90%: 10%, S₂=80%: 20%, S₃= 70%: 30% S₄= 60%: 40% S₅=50%: 50% S₆:=60%:40. Eighty-four interlocking blocks 230 mm x 200 mm x 110 mm in size were cast to be preserved at ambient temperature for 28 days. The density, strength in compression, and water absorption of the interlocking blocks were then evaluated. Three layers of interconnecting blocks were used to produce prisms that measured 600 mm long, 375 mm high, and 200 mm wide. Blocks and prisms provided with 70% crushed stone sand and 30% scrap glass had the optimal characteristics.

KEYWORDS: Crushed stone sand. flyash, GGBS, Interlocking blocks, Scrap glass,