Effects of polypropylene fibre on the compressive and splitting tensile strength of concrete
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Date
2018
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Abstract
Concrete is a versatile construction material comprising of cement, aggregates, water
and occasionally admixture. It is very good in compression and weak in tension. To
complement for the deficiency in the tensile zone; cracks, reinforcements (steel, fibre,
etc.) have been found suitable. A good example of fibre is polypropylene. A concrete
grade (M20) was batched and synthetic fibre (polypropylene) was used. Two categories
of concrete specimens; with and without propylene fibre. The fibre was introduced in
varying percentages (0.2%, 0.4%, and 0.6%) by weight of concrete. The compressive
strength of concrete containing 0.4% polypropylene fibre at 28 days has the highest
value of 32.22N/mm2 as compared to 30.22N/mm2, 30.49N/mm2 and 30.39N/mm2 for
0%, 0.2%, and 0.6% respectively. The splitting tensile strength at 7 days increases from
6.176 N/mm2 to 8.386 N/mm2 as the percentage of fibre increases from 0% to 0.4%.