PERFORMANCE STUDY OF SEMI DENSE BITUMINOUS CONCRETE BY ADDING POLYMER FIBERS
| Author(s) | : | G Anand, N Naganjanaya |
| Institution | : | M.Tech Student, Nalanda Institute of Engineering & Technology, AP, India |
| Published In | : | Vol. 4, Issue 3 — March 2017 |
| Page No. | : | 313-321 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
Bitumen is a very complex material and durability of bitumen pavement depends upon selection of appropriate grade ofbitumen to suit the climate conditions and traffic loading. Increase in traffic density, coupled with higher wheel loads andtemperature variations lead to premature failure of bituminous course. The crack, once initiated, propagates up-wardscausing gradual weakening of the pavement. Fiber Modified Binder has been found to improve the engineering properties ofpaving mixes.In the present study, tests are conducting on fibre modified and unmodified Semi Dense Bituminous Concrete(SDBC) and various inferences obtained from the experimental investigations are discussed. Bitumen of 60/70 penetrationgrade as binder and polymer fibres like polyester fibers and polypropylene fibres are used for the modification process. Tostudy the efficiency of the fibre modified bituminous mixes, Marshall Stability test was conducted. Various tests were alsoperformed on aggregate and bitumen to determine the engineering properties.The maximum Marshall Stability valuesobtained in case of Polyester Fibre Modified Bituminous Mix is 15.41 KN and polypropylene fibres is 14.18 at optimum fibrecontent and ordinary bituminous mix is 13.74 KN at optimum Bitumen content. From the Marshall Stability tests conducted,an optimum fibre content of 0.3% by weight of total mix was obtained. About 12% increase in stability values can beachieved by reinforcing the bituminous mix with polyester fibres and 3% increase can be achieved by polypropylene fibrescompared with ordinary bituminous mix. Higher stability values indicate that the modified mixes would be less susceptible tocracking of flexible pavements. Permeability is directly proportional to the percentage of air voids so that if the air voids aremore, then the permeability will be more.
G Anand, N Naganjanaya, “PERFORMANCE STUDY OF SEMI DENSE BITUMINOUS CONCRETE BY ADDING POLYMER FIBERS”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 4, Issue 3, pp. 313-321, March 2017.
