Abstract: An Engineered Cementitious composite is an ultra ductile cementitious composite which is highly crack resistant, with a tensile strain capacity over that of normal concrete. Engineered Cementitious Composites is similar to Fiber Reinforced Concrete. FRC contains water, cement, fine and coarse aggregate, fiber, and some common chemical additives. But only difference between FRC and ECC is, in ECC coarse aggregates are not used as they tend to adversely affect the unique ductile behavior of the composite. Polypropylene fibers have advantageous characteristics, the weak bond with the cement matrix as a result of their smooth surface and chemical inertness remains a large limitation. It has been demonstrated that the fiber-matrix bond strongly affects the ability of fibers to stabilize crack propagation in the matrix. As the bond between fiber and matrix is mainly mechanical, it seems that incorporating silica fume into fiber reinforced cement composites provides a better bond with the matrix through pore refinement and better distribution of the hydration products. Hence, in this project an effort was made to study the effect of PP fibers on the mechanical properties of mortars incorporating silica fume. Six fiber volume fractions 0%, 0.1%, 0.2%, 0.3%, 0.4% and 0.5% were considered. The experimental study is to present the behaviour of prism with optimum percent of fibers under two point loading.
Keywords: Engineered Cementitious Composites, polypropylene fiber, cement paste, silica fume, and properties of concrete.
Title: Experimental Investigation of Polypropylene Fiber in Engineered Cementitious Composites
Author: Ms.E. Ramya, Ms. S. Nalini, Mrs. S. Sivaranjini, Mr. R.M. Saravanakumar
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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