Study on Strength of Concrete using Polypropylene Fibres

SAVITA PATIL , AKSHATA

Concrete, Strength, polypropylene fibre, durability

Now-a-days, there has been a significant increase in the use of fibres in concrete for improving its properties such as tensile strength and ductility. Now-a-days polypropylene fibre, etc. use while preparing concrete. polypropylene fibre has the advantages of having higher tensile strength and compressive strength, thus reducing the loss of damage during fire accident of concrete structures. In this investigation polypropylene fibre are added to the concrete by volume fraction to determine its strength characteristics. Determination of compressive, split tensile and flexural strength of concrete. Polypropylene is a synthetic hydrocarbon polymer, the fiber of which is made using extrusion processes by hot drawing the material through a die. Its use enables reliable and effective utilization of intrinsic tensile and flexural strength of the material along with significant reduction of plastic shrinkage cracking and minimizing of thermal cracking. Comparison of the strength performance of conventional concrete was made. This is experimental study done by using polypropylene fibres without flyash in concrete and conclusion from their various strength parameters finding out the optimum quantity of polypropylene fibers required to achieve the maximum compressive strength for M40 grade concrete. From the exhaustive and extensive experimental work it was found that with increase in polypropylene fiber content in concrete there was a tremendous increase in compressive strength. The effect of the addition of polypropylene fibers on the mechanical properties of normal strength concrete is studied. The polypropylene fibers were added at concentration of 0.3, 0.4, 0.5 and 0.6 % by volume. Compression, pullout and bending tests were carried out to determine the mechanical properties such as maximum compressive strength, splitting strength. On the basis of the experimental results, it can be concluded that, ductility of concrete significantly increased and maximum compressive strength slightly increased with increasing the content of polyproplylene fibers materials. Further increase of polypropylene fibers (higher values than 0.5 vol. %) did not increase the ultimate bond strength, but it provided much more ductile bond behaviour.

Volume 14 Issue 4, April-2026

Pages : g736-g749