Authors: Rama Mohan Rao, P Ravi Chandra. A
In this paper steel and palm fibres (natural fibres) was used as hybrid fibre volume fractions with class C fly ash as cement replacement material has been studied. This study aims the optimization of volume faction of steel and palm fibre content in class C fly ash concrete. In this study the percentage of total volume fraction of hybrid fibre is limited to 1.0 and the replacement level of class C fly ash in binder was maintained at 40%. In total five different concrete mixes was used. For each mix standard sizes of cubes, cylinders and prisms were cast as per Indian standards and tested for the mechanical properties such as compressive strength, split tensile strength, flexural strength , modulus of elasticity at age of 28 and 90 days. Compare the experimental results of different hybrid volume fractions of reinforced concrete with 1.0% volume fraction of steel fibre reinforced concrete mix. The test results showed that hybrid fibres (steel + palm) were most effective in improving the mechanical strength characteristics particularly comparable with concrete mix without fibres.
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