Role of graphene oxide and glass fibers on the properties of pervious concrete

Pervious concrete (PC) has been widely employed in parking areas, residential streets, walkways, etc. because it allows water to run through it at a rapid pace, thus reducing runoff from a site and allowing groundwater recharge. The major hindrance in utilizing PC for various applications is its lower compressive strength than conventional concrete. This work employed fillers such as chopped glass fibers (GFs), glass fiber mats, and graphene oxide (GO) to increase the compressive strength of PC without compromising its capability to drain water. The PC samples prepared by incorporating 0.375″ gravels exhibited maximum compressive strength (5.01 MPa) while the PC sample comprised of 6 mm sized chopped GF demonstrated ~1.7 times higher compressive strength than that prepared with GF mats. Furthermore, GO loading of 0.036 wt.% in PC improved the compressive strength by two times compared to the neat PC sample without altering the flow rate of the PC.