Assessment of Polypropylene Fiber for Effect on Fresh and Physical Performance with Durability of Self-Compacted Recycled Aggregate Concrete

Tiwari, Pawan Kumar; Singh, Vinay Kumar

doi:10.22059/ceij.2024.362561.1943

Assessment of Polypropylene Fiber for Effect on Fresh and Physical Performance with Durability of Self-Compacted Recycled Aggregate Concrete

Authors

¹ Madan Mohan Malaviya University of Technology Gorakhpur Uttar Pradesh India

² Madan Mohan Malaviya University of Technology Gorakhpur Uttar Pradesh

10.22059/ceij.2024.362561.1943

Abstract

Manuscript targets to develop Self-Compacted High-Performance Concrete (SCHPC) by substituting 50% of Natural Aggregate (NA) with Recycled Coarse Aggregate (RCA), along with incorporation of Polypropylene Fiber (PP) Reinforcement at varying volume fractions. Manuscript focuses on the effects of different proportions of polypropylene fibers (0.2%, 0.4%, and 0.6%) when replacing 50% of NA with RCA. The impact of PP reinforcement on various mechanical properties of concrete, like compressive strength, flexural strength, and split tensile strength are examined thoroughly. For durability of SCHPC, Carbonation Resistance, Water Absorption, and Acid Resistance are also explored in the presented paper. Compressive strength of both Natural Aggregate Concrete and Recycled Aggregate Concrete initially increases up to a fiber concentration of 0.4% before declining with increased fiber contents. Identical patterns appear for split tensile strength, where 0.4% fiber content is found to be ideal to optimize strength. At 0.4% PP fiber, minimum carbonation depth for NAC was reported as 2.94, 4.91, and 7.12 percent for 7 , 14 and 28 days, respectively. Comparable results are obtained for RAC, for fiber volume proportion of 0.4%. So, the reduction of approximately 16.67% for NAC (28 days) and 17.54% for RAC (28 days) at control mix.

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