Abstract
Alkali-activated slag concrete (AASC) with odium silicate-bonded sand (WSSS) is a potential solution to mitigate the environmental impact of traditional cement. However, its feasibility for structural applications has remained uncertain. This study examined the potential of WSSS to substitute fine aggregate in AASC compared to natural aggregates and Quartz sand. The exceeded compressive strength of AASC suggested its practical applications for structural purposes. The alkali activator concentration influenced the compressive strength of concrete. The optimal concentration of 5% to 6% increased compressive strength. In addition, the aggregate type significantly affected the strength, structural performance, and erosion rate of concrete. The erosion rate in alkali-activated slag mortar with natural aggregates in the presence of the strong alkali was remarkable compared to WSSS and Quartz sand. This study highlighted the potential of WSSS as a low-cost, durable aggregate alternative for AASC. This offers a promising solution for more environmentally friendly construction materials.
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