Abstract
AbstractThe high embodied energy of conventional geopolymer production, which resulted from the necessity of high alkaline activator content and heat curing, hinders the transition of geopolymer technology toward industrial applications. This paper introduces a novel geopolymer system based on hybridization between high calcium wood ash (HCWA) and pulverized fuel ash (PFA), which use a low percentage of alkaline activator (5% of binder weight), ambient temperature curing, and a pressurized forming method for the fabrication of load bearing masonry unit. The elimination of alkali hydroxide was made possible by the Arcanite mineral (approximately 12%), which is inherently present in HCWA. The HCWA-PFA geopolymer mortar blocks with various sodium silicate content (0–5%) and curing regime (water and moist curing) were assessed in terms of mechanical (compressive, flexural, and UPV) and durability performance (water absorption, total porosity, and intrinsic air permeability) over a curing period of up to 90 da...
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