Experimental Study on Compressive and Flexural Strengths of HighStrength Pervious Concrete Using Various Binding Material

This paper examined the properties of high-strength pervious concrete to investigate the applicability to highways. The properties included porosity, compressive strength, and flexural strength. The high-strength pervious concrete were produced using ordinary Portland cement, silica fume premixed cement, and geopolymer as binding materials. Consequently, the experiment confirmed that the relationship between the compressive strength and flexural strength of pervious concrete using high-strength binding materials (compressive strength of 150 N/mm² or higher) such as silica fume premixed cement (water–cement ratio = 0.15) and geopolymer (solution-powder ratio = 0.5). In addition, it confirmed that their porosity can be approximated by an exponential function, similar to that of pervious concrete using ordinary Portland cement as a binding material. Furthermore, it was observed that pervious concrete using silica fume premixed cement (water–cement ratio = 0.15) as a binder could achieve a compressive strength of 22.5 N/mm² and a flexural strength of 4.5N/mm² up to 20% porosity, emphasizing water permeability. In addition, it was established that pervious concrete using geopolymer as a binder could achieve a compressive strength of 22.5 N/mm² in the high-porosity range of 20–25% and partially meet the flexural strength requirement of 4.5 N/mm², also in the region emphasizing water permeability. These results demonstrate the potential of high-strength pervious concrete for use in highways.