Search for a command to run...
With the ongoing depletion of river sand in many regions, sea sand has emerged as a cost-effective alternative for fine aggregate in construction applications. However, its use requires chemical treatment to eliminate salt content and ensure structural integrity. This study evaluates the performance of concrete utilising treated sea sand, with a specific focus on its early-age properties and long-term viability as a sustainable aggregate substitute. The research evaluates the compressive strength of concrete utilising sea sand as a partial or full replacement for fine aggregate. For this investigation, M25 grade concrete cubes were cast and subjected to compressive strength testing at curing intervals of 7, 14, and 28 days to monitor strength development. With the ongoing expansion of infrastructure development globally, the supply of river sand and fresh water for concrete production has faced significant shortages, particularly in coastal areas. Early age X-ray diffraction analysis has indicated that sea sand exhibits notable properties, positively influencing the surface characteristics. However, studies have also revealed that the incorporation of sea sand in concrete can lead to the corrosion of reinforcement due to the presence of chloride ions, as well as hinder the carbonation process of the concrete. Major Findings: The study shows that properly desalted sea sand has properties comparable to river sand and can be safely used in concrete with only a slight reduction in compressive strength at higher replacement levels. Durability tests and XRD analysis confirm good water resistance, stable mineral composition (mainly quartz), and acceptable long-term performance when salt content is removed.