Modeling and determination of pervious polymer concrete properties with different granulometry

Global climate change, increasing urbanization and the depletion of natural resources have increased the need for innovative building materials to effectively manage rainwater. Pervious concrete is considered as an important solution for sustainable urbanization. In the literature, it was observed that most of the studies on this subject focused on pervious concrete made with traditional cement, but the use of polymer resin instead of cement paste was limited. This study aims to determine the mechanical and durability properties of pervious polymer concretes produced using polyester and epoxy resins as binders and calcite and basalt crushed stone with different grain diameters as aggregates and to contribute to the literature with the findings obtained. In the study carried out to determine the physical and mechanical properties of permeable polymer concrete, unit weights, ultrasonic pulse velocities, permeability coefficients, void ratios, flexural strengths, compressive strengths and splitting tensile strengths were investigated. In order to evaluate the resistance to aggressive environmental conditions, the specimens were conditioned for 28 and 56 freeze-thaw cycles, kept in 10% HCl and 10% MgSO4 solutions for 90 and 180 days, and kept in an oven at 50°C and 100°C. The changes in the microstructure of the samples were examined using SEM images, EDS analysis, and Micro-CT scans.The effect of resin type, aggregate type and aggregate grain diameter on the permeability coefficient was mathematically modeled by linear regression analysis using Python software. As a result, permeable concretes with a void ratio of 40%, permeability coefficient of more than 11 mm/s and compressive strength of more than 11 MPa were obtained using polymer resin. It was observed that the specimens produced with epoxy resin offered higher mechanical strength and permeability properties than the specimens with polyester binder and exhibited superior performance under aggressive conditions. This study highlights the environmental contributions, mechanical properties and durability performance of permeable polymer concretes.