Investigation of aggregate size effects on properties of basalt and carbon fibre-reinforced pervious concrete

Pervious concrete structure consists of meso-sized pores due to partial or complete elimination of fine aggregates, resulting in decreased mechanical properties in par with conventional concrete. Meanwhile, fibres were pronounced to improve the mechanical properties of concrete without affecting its durability. The main objective of the study is to compare the properties of basalt fibre-reinforced pervious concrete (BFRPC) and carbon fibre-reinforced pervious concrete (CFRPC) with two single-sized aggregates, namely 12.5 and 20 mm. The volume of both the fibres was varied from 0 to 0.4% at intervals of 0.1%. Pervious mix with 12.5 mm sized coarse aggregates and carbon fibre content of 0.2% (12.5CFRPC0.2) was observed as an optimum mix with respect to mechanical strengths as it improved the compressive strength, split tensile strength and flexural strength by 11.59%, 32.70% and 35.32%, respectively, compared with the conventional mix.