A new explainer authored by Danial Amini, Prof. Kenneth Strzepek, and Dr. Randolph Kirchain sheds light on an oft-overlooked threat to infrastructure: the damaging impact of flooding on pavement durability. While dramatic, catastrophic flood events frequently dominate news headlines, a more insidious and pervasive risk stems from prolonged standing water. When water lingers on the roadside, it seeps deep into the underlying subgrade, severely weakening the foundational soil layer that supports the vehicle weight above. This moisture infiltration accelerates severe structural failures such as cracking, rutting, and rapid overall deterioration over time. The economic and logistical stakes of this issue are immense, considering that approximately 93% of the U.S. paved road network is comprised of flexible pavements, which are uniquely vulnerable to this type of moisture-driven degradation.
Despite the severity of this threat, current engineering design tools and building codes completely fail to account for the long-term effects of flood exposure on roadway longevity. The explainer highlights critical gaps in existing pavement research, emphasizing the urgent need for updated infrastructure models that can anticipate evolving environmental stresses. To address this vulnerability, the MIT Concrete Sustainability Hub (CSHub) is actively working to develop a pioneering, risk-based framework. This innovative model aims to directly link various flood exposure scenarios to pavement service life and overall lifecycle costs, providing urban planners and engineers with the predictive tools necessary to build more resilient, cost-effective transportation networks.
Read more here: https://cshub.mit.edu/explainer-assessing-the-impact-of-flooding-on-pavement-performance/