An Experimental Study on Fiberly Reinforced Concrete Using Polypropylene Fibre with Virgin and Recycled Road Aggregate

Abstract

A b s t r a c t This research work mainly focuses on improving the concrete strength based on fiber reinforcement both in compression and tension. Concrete with various mix proportions containing dosage of Polypropylene (PP) fiber of lengths ranging from 13 to 25 mm with coarse aggregate replacement levels at 10%, 20%, and 30% by dismantled road aggregate were made and the compressive and tensile strengths were investigated. The experimental test results revealed high compressive and tensile strength at curing period of 28 and 56 days. The specimens tested observed that due to addition of fiber, the fibers could hold the matrix together even after extensive cracking and crushing. Net result of all these is to impart to the fiber composite pronounced post-cracking ductility which is absent in traditional concrete. In order to provide base for comparison, concrete specimens as a reference were cast without the addition of polypropylene fiber. Test result revealed that by adding polypropylene fibers at 6grams per one kg of cement a considerable improvement in the strength of concrete of 37.68 MPa and 43.59 MPa at 28 and 56 days respectively with 10% coarse aggregate replacement by recycled aggregate is achieved.

Assessment of Physical and Mechanical Properties of Concrete Produced from Various Portland Cement Brands

“…Similarly, for each mixture and for the three above curing periods, 15 cylinders having diameter of 150 mm and height of 300 mm were cast to check the spilt tensile strength of concrete. The specimens were fabricated and removed from moulds after 24 hours and kept in a totally wet environment for 7, 14 and 28 days curing period[22] [23][24] [25].…”

Experimental Investigation on the Properties of Recycled Concrete Using Hybrid Fibers

“…It became obvious that 1% fiber reinforcement ratio was the optimal percentage in this study to enhance the mechanical properties of concrete. The 1% fiber reinforcement ratio threshold was also observed by [22] [23]. In general, concrete is inherently weak in tension, and to enhance the tensile strength fibers contribute at significant degree.…”

Properties of Sustainable Concrete Containing Red Mud: A Review

“…2). They reported that the decrease in strength was due to the unavailability of the required amount of calcium hydroxide [44][45][46]. Sethy et al [18] made concrete which containing (5%, 10%, 15% and 20%) red mud as substitute of cement.…”

“…There was a 2.5% to 5% improvement in compressive strength for each percentage replacement. Beyond 20% replacement with red mud the strength decreased [46][47][48][49].…”