The effect of aggregate mix variations in porous blocks on compressive strength and infiltration values in flood prevention

Abstract Pore block is an alternative pavement material that is environmentally friendly and serves to reduce water puddles and accelerate the rate of infiltration into the soil, thereby preventing flooding. This study was conducted to determine the effect of variations in aggregate size and variations in the ratio of cement and aggregate mixtures on the compressive strength and infiltration rate of pore blocks. This study was carried out using an experimental method. The variations in aggregate sizes used were aggregates measuring 2.36 mm, 4.75 mm, and 9.5 mm mixed in several specific compositions using aggregate and cement ratios of 1:3, 1:4, and 1:5. The test results showed that variations in aggregate size and the ratio of cement and aggregate mixtures had an effect on the compressive strength and infiltration values of pore blocks. The highest compressive strength value was obtained at a ratio of 1:3 with 60% aggregate measuring 4.75 mm and 40% aggregate measuring 2.36 mm at 13.083 MPa. Meanwhile, the highest infiltration rate was obtained at a ratio of 1:5 with 60% 9.5 mm aggregate and 40% 4.75 mm aggregate at 17,896.528 mm/hour. Thus, selecting the right aggregate and cement mixture ratio can affect the compressive strength value and increase the infiltration rate in the pore block.