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Enhancing the strength and durability of lime mortar with Acacia Seyal Gum: A sustainable solution for diverse climatic conditions

Suthaagaran Vallabhy, Selvaraj Thirumalini

Advances in Science and Technology. Research Journal

2025

Vol. 19, no. 3

47--62

This study investigates the enhancement of lime mortar using Acacia Seyal Gum, a natural biopolymer, to improve its strength and durability under various environmental conditions. Mortar samples were prepared by adding Acacia Seyal Gum at 1%, 3%, and 5% by weight to its volume. The mechanical properties of the modified mortar were assessed under varying climatic conditions, specifically at temperatures of 25°C and 35°C and relative humidity levels of 20%, 50%, and 72%. The 3% gum-modified mortar showed the most significant improvement, exhibiting superior strength and durability compared to the reference mortar across all tested environments. Adding Acacia Seyal Gum improved the bond between lime and sand particles, decreased porosity, and increased moisture retention, which helped prevent early shrinkage and cracking. This study highlights the potential of Acacia Seyal Gum as a sustainable and effective additive for lime mortar, contributing to modern eco-friendly construction and the restoration of historic structures. The findings suggest that the gum-modified mortar could provide a reliable, durable, and environmentally responsible alternative to traditional lime mortars in regions with challenging environmental conditions.