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Inclusion of nanoquartz particles in sandcrete blocks has revolutionized their strength and durability, offering a sustainable solution for construction applications where superior performance and longevity are required. This study aims to assess the strength and durability of nano-sandcrete blocks through a comprehensive analysis of their properties. Nano-sandcrete blocks were fabricated using various mix ratios, cured for 7 and 28 days, and evaluated for compressive strength, bulk density, morphology, and water absorption capacity. Particle size analysis revealed the presence of coarser particles in both sharp sand and quartz sand, contributing significantly to the strength and stability of the blocks. The bulk density of nano-sandcrete blocks varied across different mixtures and curing times, with values ranging from 1772.67 kg/m3to 2660 kg/m3after 28 days, with higher percentages of sharp sand and nanoquartz contributing to increased bulk density. Water absorption capacity varied from 10.56 to 27.89% depending on the mixture composition. Finer particles like nanoquartz and quartz sand reduced water absorption by decreasing porosity. Compressive strength improved significantly after 28 days, ranging from 3.7 N/mm2to 8.22 N/mm2. SEM micrographs showed effective particle-matrix interaction with well-dispersed nanoquartz particles, suggesting enhanced strength and durability. The optimal composition of 80% sharp sand, 5% quartz sand, and 15% nanoquartz demonstrated improved performance, indicating that nanoquartz can enhance the strength and durability of sandcrete blocks for construction applications.

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