• Ms. Kajal Vinay Badhe
• Mrs. Ashwini R. Patil

Concrete pavements are widely used over flexible pavement due to its heavy load carrying capacity and providing long-lasting solutions in highways, bridges and airports. Even if the pavements are well designed and properly constructed, some distresses occur in concrete pavement such as joint spalling, faulting, cracking, pumping, punch out etc. Among these distresses, cracking commonly occur in concrete pavement. This study investigates the effect of addition of polypropylene fibers on mechanical and some durability properties of M40 grade blended concrete with 15% fly ash. Polypropylene structural graded fibers with 24-50mm length were used at four different proportion like 0.5 kg/m3, 1.0 kg/m3, 1.5 kg/m3, 2.0 kg/m3. The compressive strength, splitting tensile strength, flexural strength, water absorption, ultrasonic pulse velocity, hydraulic point load testing of concrete slabs were examined. Results of the experimental study indicate that addition of polypropylene fibers improves mechanical properties. The maximum compressive, splitting tensile and flexural strength were observed at 1 kg/m3 dosage of polypropylene fibers. However, the workability and water absorption decreases with the increase in fiber content .This is due these fibers do not absorb water and It is observed that this does not affect the water requirement and strength properties of concrete. The ultrasonic pulse velocity test results show that the addition of 1 kg/m3 fiber is more suitable for making the concrete good in quality and continuity. Concrete slabs were made with optimum dosage of polypropylene fiber i.e 1kg/m3 and tested for hydraulic point load to determine first crack load. Polypropylene. Fiber reinforced concrete specimens were found to be stronger than control specimen, transfer load effectively and reduce crack formation. Reduced cracks ensures pavement durability, reduced maintenance, improved performance and ride quality.

Concrete Pavement, polypropylene fibers, Mechanistic properties, water absorption test, UPV, Hydraulic point load test.

"Early and Later Age Performance Analysis of Precast Concrete Pavement using Polypropylene Fibers", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 10, page no.584-597, October-2020, Available :http://www.jetir.org/papers/JETIR2010071.pdf

"Early and Later Age Performance Analysis of Precast Concrete Pavement using Polypropylene Fibers", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 10, page no. pp584-597, October-2020, Available at : http://www.jetir.org/papers/JETIR2010071.pdf