EVALUATION OF STRENGTH, PERMEABILITY AND VOID RATIO OF PERVIOUS CONCRETE WITH CHANGING W/C RATIO AND AGGREGATE SIZE

Pervious concrete strength and permeability mainly depend on aggregate size and proportion of the materials. This paper discusses various combination of pervious concrete with different aggregate size and water-cement ratio. Three aggregate sizes 6-10mm, 10-20mm and 50% mix of both sizes are taken. Water-cement ratio of 0.30, 0.35 and 0.40 were used for each aggregate size. The objective of this investigation is to study the effect of variation in aggregate size and water-cement ratio on pervious concrete. For the measurement of permeability testing setup is developed based on falling head method. The experimental investigation was carried out to evaluate the density, compressive strength and permeability and void ratio. The compressive strength pervious concrete showed an increase in water/cement ratio increased. The compressive strength of pervious concrete is less than conventional concrete. The void ratio is to be found in range of 25% to 32%, which is sufficient for pervious concrete. Similarly, permeability of pervious concrete decrease using small size of aggregate. Based on study it was found that with using 0.3 w/c ratio and Mix (50%) aggregate gives better result for pervious concrete.