ARC Laboratory Services provides chemical testing to identify contaminants in aggregate materials that can affect concrete and construction performance. We test for the presence of sugar to AS 1141.35, which can retard cement hydration and compromise concrete strength. We screen for organic impurities that interfere with cement setting and bond development. We also test for clay and fine silt content to AS 1141.33, which affects workability, durability, and surface finish. These tests support aggregate source approval and quality control for concrete production, road construction, and civil engineering projects across Western Australia.