Concrete is commonly used construction material in world. Normal concrete is brittle in nature. Engineered cementitious composite (ECC) is ductile concrete which exhibits strain hardening behaviour. The significance of research is to study failure mode and effect of PVA fibers on tensile and flexural properties of ECC. The study has been conducted using PVA fibers in ECC with varying percentages from 0.5% to 2.5% at 0.5% interval. Mix design is carried using trial-and-error method. Control specimen of M30 and M40 grade is used to compare the results. Test results reveal that compression strength is not greatly enhanced, but there is change in failure mode. The tensile strength and flexural strength at 1.5% PVA fiber is nearly twice the control specimen. There is increase in deflection before failure of beams with increase in fiber content. There is formation of multiple microcracks before failure and spalling of concrete is prevented.

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An Experimental Study on Tensile and Flexural Properties of Engineered Cementitious Composite Produced with PVA Fibers

  • Vijayakumar M. Javalagaddi,
  • K. B. Prakash

摘要

Concrete is commonly used construction material in world. Normal concrete is brittle in nature. Engineered cementitious composite (ECC) is ductile concrete which exhibits strain hardening behaviour. The significance of research is to study failure mode and effect of PVA fibers on tensile and flexural properties of ECC. The study has been conducted using PVA fibers in ECC with varying percentages from 0.5% to 2.5% at 0.5% interval. Mix design is carried using trial-and-error method. Control specimen of M30 and M40 grade is used to compare the results. Test results reveal that compression strength is not greatly enhanced, but there is change in failure mode. The tensile strength and flexural strength at 1.5% PVA fiber is nearly twice the control specimen. There is increase in deflection before failure of beams with increase in fiber content. There is formation of multiple microcracks before failure and spalling of concrete is prevented.