Synergistic Mitigation of Greywater-Induced Degradation in Engineered Cementitious Composites (ECC) using Nano-SiO۲ and Basalt Fibers

Global water scarcity has necessitated the integration of non-conventional water sources into construction materials. This research evaluates the comprehensive performance of Engineered Cementitious Composites (ECC) formulated with ۱۰۰% recycled greywater (GW). To mitigate the adverse effects of organic contaminants and surfactants present in GW, which typically compromise the interfacial transition zone (ITZ), a hybrid modification strategy using ۲.۰% nano-silica (NS) and ۱.۵% basalt fibers (BF) was investigated. Advanced ultrasonic dispersion was utilized to prevent nanoparticle agglomeration. Mechanical testing demonstrated that while GW alone initiated a ۹.۵% reduction in compressive strength, the NS-modified specimens exhibited a substantial recovery, reaching ۴۹.۸ MPa. Microstructural characterization via SEM revealed that NS acts as a catalyst for secondary C-S-H formation, effectively encapsulating basalt fibers and preventing alkaline erosion. The findings confirm that the synergistic interaction between NS and BF facilitates a high-ductility, eco-friendly composite, achieving a ۵۰% increase in tensile strain capacity compared to traditional ECC.

کلیدواژه ها:

Engineered Cementitious Composites ، Greywater Recycling ، Nano-Silica ، Basalt Fibers ، Sustainability ، Microstructure