Ecology, Environment and Conservation Paper

BEHAVIOUR OF HYBRID FIBER REINFORCED CONCRETE SLABS IN FRAMES UNDER STATIC LOADING

Ms. K. Ramadevi and D.L. Venkatesh Babu

Abstract

The performance of conventional concrete is enhanced by the addition of fibres in concrete. In this paper the behaviour of RC slab structures by using Hybrid Fibre (steel and polyolefin) Reinforced Concrete (HFRC) was determined. The mix design was done for M25 grade concrete as per IS: 10262: 2009. The various percentages of fibres ranging from 0.50% to 3% by weight of cement were used in the investigations. The HFRC specimens like cubes, cylinders, prism with hybrid fibres of the various percentages were casted, cured and tested for 28 day strength. The compressive strength, split tensile strength and flexural strength of the HFRC specimen were obtained and compared with control specimens. Simply supported one-way slab specimens were casted with hybrid fibre dosages of 0.75%, 1.5%, 2%, and 3% and the slabs were subjected to two static line loads at third points of the slab by hydraulic jacks. Totally five slabs were casted and tested including control slab specimen. The ultimate flexural load of the HFRC slab specimens were determined and compared with that of the control slab specimens. The test results show that use of Hybrid Fibre reinforced concrete improves flexural performance of the slabs under static loading.