F4-H: Optimal Design and Use of Advanced Structural Materials to Mitigate Explosive and Impact Threats

The initial focus of this mitigation effort was to conduct studies that aimed to understand the response of conventional and novel materials and structures to shock loads (internal or external) with or without a high temperature environment. The ultimate goal was the development of materials and structures that can mitigate blast conditions. The major focus is an investigation of the effectiveness of coating technologies for structural protection during a blast, including the integration of multi-layered systems with varied densities. The initial phase of work included the hybrid base material development and characterization. This included the development of an optimized randomly distributed reinforced polyurea coating system for reduced fragmentation and enhanced blast and impact protection. System selection for evaluation in reinforced concrete panel and barrier systems was then initiated. Concurrently the system was evaluated for wider application to multi-hazard use in strengthening reinforced concrete elements for flexure, shear and axial loading. Current work is looking at the integration into and effectiveness for systems with ultra-high performance concrete.