Effects of mineral additives on the mechanical behavior of marine sand quartz mortar

Abstract

This study explores the potential of desalinated marine sand quartz combined with mineral admixtures (fly ash, ground granulated blast slag, and silica fume) to enhance the strength of marine sand quartz mortar (MSQM) for sustainable construction. Experimental results demonstrate that silica fume, with its ultra-fine particle size and high pozzolanic activity, significantly improves compressive and flexural strength, particularly at early stages. Ground granulated blast slag confirms substantial strength enhancement, while fly ash contributes to long-term strength development. A low water-to-cement ratio (W/C) increases strength but reduces workability, necessitating careful mix design considerations. Multiple linear regression analysis was employed to develop highly accurate predictive models for strength, confirming the synergistic effects of mineral admixtures and W/C ratio. This research introduces a novel approach to utilizing marine sand and contributes to minimizing environmental impact and promoting sustainable construction, particularly in coastal regions.