Clogging and rehabilitation performance of pervious concrete

Abstract

The performance of pervious concrete was observed for different cloggers like Sand (S), Clay (C) and their combination (S&C). The clogging potential of pervious concrete was determined by simulating natural clogging conditions on cylindrical specimens with a sediment load of 50, 150, and 200 grammes for S, C, and combined S & C laden runoff cycles, respectively. Furthermore, this study was extended to observe the recovery rate of infiltration using rehabilitation techniques such as vacuuming (V), Pressure Washing (P) and Vacuuming Followed by Pressure Washing (VP). It was observed from the results that combined (S & C) clogger shows overall critical results of clogging as 80% of the clogging was seen in 3 to 4 cycles. However, cloggers S and C shows 80% of clogging after 7 and 8 cycles. Moreover, among rehabilitation techniques, V shows average recovery rate of 52%, 75% and 76% for C, S and S & C cloggers. An average recovery rate of 63%, 71%, and 71% was seen for C, S and S & C cloggers on applying P technique. However, VP shows a maximum recovery rate of 78%, 77% and 64% against C, S and S & C cloggers.