Evaluation of in-situ permeability measurement methods for pervious concrete pavement

The permeability coefficient is the foundation of evaluating the clogging and maintenance. In this study, 384 field tests were carried out on 9 positions using single-ring and double-ring permeameters with different diameters. Both falling head and constant head methods were evaluated. At the same time, core samples were drilled from the 9 test positions, and their permeability coefficients were measured in the laboratory. The results show that there is a good correlation between falling head method and constant head method, both of them can be used to measure in-situ permeability coefficient of pervious pavement. Although the double-ring method can reduce the transverse seepage inside the pavement, the effect of double-ring permeameters with different cylinder diameters is different, and permeameters with larger cylinder diameters are better. For sites with permeability greater than 2 mm/s, it is not recommended to use permeameters with small cylinder diameters..