He, Haiwen. Evaluation of mechanical and hydrological properties of pervious concrete for use in sidewalks in New Jersey. Retrieved from https://doi.org/doi:10.7282/T3NS0Z1Z
DescriptionPermeable concrete pavements have been increasing in popularity as a potential solution to reduce the amount of impermeable surface area associated with a project, reduce splash and spray on roadways, and reduce puddling for sidewalks. Permeable concrete pavement systems can potentially eliminate the need for conventional drainage systems. As important as these benefits are to surface runoff mitigation, there are concerns with the service life and structural strength of pervious concrete. The composition and structure of pervious concrete creates limitations to its mechanical strength properties and some challenges in its maintenance to achieve the expected service life. The performance of pervious concrete pavements is relevant to its geographical location and application as well. Eleven different pervious concrete mix designs were evaluated, including commercially available mixes and laboratory mixes. Mechanical properties such as compressive strength, flexural strength, flexural stiffness, tensile strength, and elastic modulus were measured. Shrinkage and freeze-thaw resistance were also tested. By modifying mix proportions, aggregate sizes and types in the pervious concrete mix designs, the observed changes in physical characteristics, mechanical properties, and hydrological properties were evaluated. Careful control of the mix design to provide proper workability within allowable transit times as well as the ability to withstand freeze-thaw, and modulus measurements were found to be important to creating successful field mixes from laboratory trials.