This $500,000 Project Grant award from the National Science Foundation's Engineering program (CFDA 47.041) supports research at the University of California, San Diego to explore the use of lightweight backfill materials, such as tire-derived aggregate (TDA) and lightweight cellular concrete (LCC), combined with geosynthetic reinforcements or separators to create new "geo-composite" materials for geotechnical infrastructure. The research aims to understand how these contrasting materials can be configured to achieve desired structural and seismic performance characteristics, leveraging insights from aerospace composites engineering. The project will involve advanced numerical modeling, scaled physical testing, and development of design guidelines, with the goal of advancing the use of lightweight, rapid-construction backfill materials that can accommodate earthquake loading or provide vibration isolation. No sub-awards are planned under this grant, which has an award date of July 1, 2025 and an ultimate completion date of June 30, 2028.
Mod # | Description | Reason For Modification | Federal Obligation (Click to sort descending) | Date (Click to sort ascending) |
|---|---|---|---|---|
| Not listed | $500.0k | 7/9/25 |