Abstract
AbstractPervious pavement (PP) is an infrastructure material that can alter rainfall-runoff relationships, filter particulate matter (PM), and sequester runoff constituents. Beyond a measure of total porosity (ϕt), less-commonly measured pore parameters and relationships thereof influence these phenomena. In this study, cementitious PP (CPP), used as a permeable surface for an exfiltration system loaded by runoff, was examined. X-ray tomography (XRT) was utilized to examine pore size and frequency, generate a total-to-effective porosity (ϕt−ϕe) relationship, quantify pore tortuosity (Le/L), and relationships for specific surface area (SSA), pore-size distributions (PSD)pore, and ϕt. Gravimetric analyses were used for SSA based on mass (SSA)s as well as validation of XRT porosity. Results indicate that ϕt ranged from 10 to 30% while ϕe ranged from 4 to 27%. Relationships for (ϕt−ϕe), SSA, ϕt, and median pore diameter (d50n) were represented with a power law model (PLM). Using ϕt the (SSA)pt of pores ranged...
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