Implementation of Porous Concrete for Sidewalks in New Jersey

Pervious concrete has been gaining popularity as a potential solution to reduce the amount of impermeable surface area associated with sidewalks, reduce puddling, and potentially slow water surface high flow rates. As important as these benefits are to surface runoff mitigation, there are concerns with the ability of pervious concrete mixes to provide sufficient structural support and longevity for the expected service life of the sidewalks, as well as life cycle costs. The composition of pervious concrete creates limitations to its mechanical strength and challenges in its maintenance to achieve the expected service life. The performance of pervious concrete sidewalks is relevant to its geographical location, subsurface conditions, and intended application. This requires constructing test sidewalks made from porous concrete in the field in urban areas. These sidewalks will be monitored and evaluated over time to assess their performance. The proposed implementation of porous concrete for sidewalks in the field is needed to evaluate their short and long term performance over time. This will help provide information on their performance, service life, life cycle costs, and environmental benefits. The implementation project requires NJDOT to select the most appropriate site to build two sidewalks side-by-side using two different mix designs of porous concrete. At each site, multiple sections can be built to evaluate the effects of construction and maintenance factors on field performance and life cycle cost.