• G.SAKETH BOSE

Engineered Cementitious Composites (ECC) are advanced cement-based materials known for their high ductility, strain-hardening behavior, and superior durability compared to conventional concrete. ECC overcomes the inherent brittleness and low tensile strength of normal concrete by developing multiple micro-cracks under tensile loading without sudden failure. Hybrid Engineered Cementitious Composites (HECC), which incorporate more than one type of fiber, further enhance mechanical performance through synergistic fiber interaction. Fly ash is commonly used in ECC; however, its future availability is uncertain due to the reduction in coal-based power generation. Hence, this study investigates the feasibility of using Alccofine as an alternative supplementary cementitious material in ECC and HECC. The experimental investigation was carried out in three phases. In the first phase, Alccofine-based ECC matrices with varying proportions were developed to determine the optimum binder composition based on compressive strength and matrix toughness. An optimum water-to-binder ratio of 0.27 and superplasticizer dosage of 0.6% were selected, and a cement-to-Alccofine ratio of 1:0.8 was identified as optimal. In the second phase, Polyvinyl Alcohol (PVA) and Polypropylene (PP) fibers were incorporated individually and in hybrid combinations. Four ECC mixes and six HECC mixes were prepared using river sand and quartz sand as fine aggregates and evaluated for fresh, mechanical, and durability properties. The results showed significant improvements in compressive, tensile, and flexural strengths with fiber addition. Tensile strength and strain capacity increased by approximately three times, while flexural strength increased by nearly two times compared to the control matrix. Durability studies indicated that Alccofine effectively refined the pore structure, with ECC containing 2% PVA showing superior durability performance. The study demonstrates that Alccofine-based ECC and HECC are viable and sustainable alternatives for high-performance construction applications. Keywords: Engineered Cementitious Composites, Hybrid ECC, Alccofine, Polyvinyl Alcohol, Polypropylene, Strain Hardening, Durability.

"Enhancing Performance Of Alccofine-Synthetic Fiber Hybrid ECC", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.13, Issue 1, page no.d465-d467, January-2026, Available :http://www.jetir.org/papers/JETIR2601357.pdf

"Enhancing Performance Of Alccofine-Synthetic Fiber Hybrid ECC", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.13, Issue 1, page no. ppd465-d467, January-2026, Available at : http://www.jetir.org/papers/JETIR2601357.pdf