Abstract
Pervious concrete (PC) is a new type of concrete that is gaining popularity because of its low-impact development capabilities and ability to reduce stormwater runoff. The current study focuses on the potential use of waste from the sugarcane industry and on flexible pavement, specifically sugarcane bagasse ash (SBGA) and reclaimed asphalt pavement (RAP), to create PC mixes. Furthermore, an unconventional method was used to extract the benefits of RAP without compromising the structural integrity of PC: designing the mixture based on hydrological properties rather than mechanical parameters and then improving structural integrity through the use of SBGA without compromising the hydrological capacity of the designed PC mixture. Six PC mix combinations were developed by substituting recycled asphalt pavement for natural coarse aggregate in varying proportions of 0, 50, and 100 %. Following that, three RAP-incorporated PC mixes were created using 5, 10, and 15 % SBGA as a partial replacement for cement. It was discovered that using SBGA as a partial replacement for cement reduces mechanical properties while increasing functional properties such as permeability. Surprisingly, no significant differences were observed in the percentage voids of PC mixes containing RAP aggregates. The addition of 10 % SBGA significantly improves the mechanical properties of 100 % coarse RAP (cRAP)-inclusive PC mixes. When the total cost of 1 m3 concrete was calculated, the addition of cRAP aggregates and SBGA in pervious concrete pavements mixes resulted in a 44 % reduction. Furthermore, the current study suggests replacing 10 % of ordinary Portland cement with SBGA in cRAP inclusive PC mixes, as this increases the strength of cRAP–PC mixes while also providing environmental and economic benefits.