Investigation into the permeability and strength of pervious geopolymer concrete containing coated biomass aggregate material

Waste palm oil products can be recycled in the production of pervious geopolymer concrete (PGC) for long-term sustainable development. PGC is a non-slip porous pavement that allows water to pass through. Biomass aggregate (BA) produced by burning biomass and introduced as replacement natural (NA). BA mixed with fly ash (FA) alkaline liquid (AL) heated an oven at 80 °C 24 h produce coated (CBA). containing CBA commonly used cement substitute concrete. This study aims develop evaluate effect rainfall intensity on ability reduce stormwater runoff. Coating paste resulted improved properties, better Aggregate crushing value (ACV), impact (AIV), absorption higher compressive strength compared BA. Results indicated, FA/CBA ratio 1:7, 5–10 mm, NaOH molarity 10 M, Na2SiO3/NaOH 2.5, AL/FA 0.5 when cured °C, gave optimum 13.7 MPa permeability 2.1 cm/s. Both revealed viable alternative aggregates producing made was 51% greater than NA. The results also showed reduction runoff due permeable decreased increased intensity.