International Journal For Multidisciplinary Research

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Experimental Studies on Development of Crack-Free Mortar using Nano-composites (Nano Silica and Halloysite Nano Clay)

Author(s) Ms. Shazia Bano, Mr. Syed Sharfuddin, Dr. Athiq Ulla Khan, Mr. Moinuddin S K
Country India
Abstract Cement mortar is susceptible to micro-cracking, which reduces its durability and service life. This study investigates the effectiveness of Nano Silica (NS) and Halloysite Nanoclay (HNC) in enhancing the mechanical properties and crack resistance of cement mortar. Using a Taguchi L9 orthogonal array, three factors were evaluated: mix proportion (1:3, 1:4, and 1:5), water-cement ratio (0.40, 0.45, and 0.50), and nanomaterial dosage (5%, 7%, and 9% by weight of cement). A total of 18 mixes were tested for compressive, split tensile, and flexural strengths at curing ages of 3, 7, 14, and 28 days. The results showed that mix proportion was the most influential factor affecting compressive strength. The optimum combination for both nanomaterials was a 1:3 mix proportion with a 0.40 water-cement ratio. HNC achieved a maximum 28-day compressive strength of 51.5 MPa at 7% dosage, while NS achieved 42.51 MPa at 5% dosage. Compared with NS-modified mortar, HNC-modified mortar exhibited improvements of 21.1% in compressive strength, 0.9% in flexural strength, and 2.9% in split tensile strength. The superior performance of HNC is attributed to its hollow tubular structure, which enhances crack bridging and mechanical interlocking. Validation experiments confirmed the reliability of the Taguchi model with errors below 2.5%. The study concludes that Halloysite Nanoclay is a promising, cost-effective, and naturally abundant nanomaterial for producing crack-resistant cement mortar with improved mechanical performance and durability.
Keywords Nano Silica (NS), Halloysite Nanoclay (HNC), Nanomaterials, Mechanical Properties.
Field Engineering
Published In Volume 8, Issue 3, May-June 2026
Published On 2026-06-10
DOI https://doi.org/10.36948/ijfmr.2026.v08i03.81210
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