Effect of the use of recycled asphalt pavement (RAP) aggregates on the performance of pervious paver blocks (PPB)

Abstract

This study describes an investigation into the assessment of performance and suitability of pervious paver blocks (PPB) using reclaimed asphalt pavement (RAP) aggregates. Virgin aggregates (VA) and RAP were mixed in three different proportions (0–100, 50–50 and 100–0) using two different aggregate gradations (G1-coarser and G2-finer) to fabricate chamfered PPBs using a standard factory method. Three different water-cement ratio (w-c ratio) (0.25, 0.30 and 0.35) were used for the production of the specimens. The properties of PPBs was characterized by measuring porosity, density, dynamic modulus of elasticity using UPV, compressive strength and abrasion by Cantabro loss (CL). Porosity and density measurements had higher variability with no strong inferences on the effect of mix attributes. The G1 gradation takes an edge over G2 as indicated by the UPV and dynamic modulus of elasticity (DME) results at the w-c ratio of 0.25 and 0.30. G1 gradation resisted deformation better than small-sized binary gradation (G2). G1 gradation depicted strength reduction of 4.23%, 14.3% and 23.6% and in the case of G2 gradation, 10%, 27% and 43% strength reduction was observed on an average for 10, 30, and 50% RAP addition, respectively. A strong correlation of CS was found with UPV and CL measurements. ANOVA results comprehended that using RAP in pervious concrete had significant effect on different properties of pervious concrete. The overall results indicate that up to 50% RAP can be used in pervious concrete paver block with G1 gradation, which will increase the sustainability aspect of pervious concrete. © 2020 Elsevier Ltd