Principal investigator: Robert Swan
University: Drexel University, Civil, Architectural and Environmental Eng. Department
Industry partners: Aero Aggregates of North
The proposed PMFI project will investigate the technical feasibility of a novel gabion-style sound wall barrier constructed using ultra-lightweight foamed glass aggregate (FGA) manufactured by Aero Aggregates. Most sound barriers used by U.S. state DOTs rely on traditional materials such as precast or cast-in-place concrete, which require costly foundations and contribute to high lifecycle expenditures. Pennsylvania ranks among the highest states in total noise barrier spending. In parallel, recent trends indicate increasing interest in sound-absorptive, rather than purely reflective, barrier systems.
This collaborative project between Drexel University and Aero Aggregates will explore the use of FGA-filled gabion-style walls as a cost-effective, rapid-construction, and sustainable alternative. Key research needs include optimization of wall and post systems to reduce foundation demands, evaluation of geotextile or geogrid containment, assessment of wind load stability, and development of inspection and maintenance access details. Meso-scale experimental testing will be conducted at Aero Aggregates’ Eddystone facility to establish feasibility and advance the technology toward implementation readiness.