EXPERIMENTAL INVESTIGATION FOR EFFECT OF CHOPPED GLASS FIBRES ON THE STRENGTH OF CONCRETE

The effect of glass fibre on flexural strength, split-tensile strength and compressive strength was studied for different fiber content on M20 grade concrete designed as per IS 10262.The maximum size of aggregates used was 20mm. To study the effect on compressive strength, flexural strength, split-tensile strength 6 cubes, 6 prisms and 6 cylinders were casted and tested. After that a practical application of GFRC in the form of cement concrete tiles was taken into consideration and no special technique was used to produce this tiles. The thickness of the tiles was 20mm and maximum size of aggregates used was 8mm.The water cement ratio was kept consistent and the admixture content was varied from .8 to 1.5 percent to maintain slump in between 50mm to 100mm.The mix proportion used was 1:1.78:2.66. The size of short fibres used were 30mm and the glass fibres were alkali resistant. The effect of this short fibres on wet transverse strength, compressive strength and water absorption was carried out. Six full sized tiles 400mm *400mm*20mm were tested and the results recorded. Pulse velocity tests was also conducted. Keyword: GFRC, AR glass fibre, AN fibres, FRP