Office of Technology Transfer – University of Michigan

Thermally Adaptive Ductile Concrete

Technology #5673

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Victor C. Li
Managed By
Richard Greeley
Senior Licensing Specialist, Engineering 734-936-2093
Patent Protection
US Patent Pending

Phase change materials contribute to high efficiency, green buildings by reducing heating and cooling costs. When incorporated into typical building components (e.g. beams, walls, or facades) phase change materials increase thermal mass and enable passive energy storage – releasing heat in cold weather and absorbing it in hot weather, thereby reducing the load on HVAC systems and improving building efficiency.

Phase change material/concrete hybrid has good thermal and mechanical properties By dispersing a microencapsulated phase change material throughout an engineered cementitious composite slab, researchers at UM were able to fabricate a building material with good thermal and mechanical properties. The chosen phase change material has a melting point near 23 °C allowing for maximum heat storage capacity at or around room temperature. Moreover, mechanical testing has shown that these hybrid materials meet or exceed Portland Cement Association standards for structural concrete making this technology a useful material for both aesthetic and load-bearing elements.

Applications • Building facades and other aesthetic materials • Structural members

Advantages • High thermal mass material for passive heat storage • Meet or exceed industry standards for mechanical strength • Improved tensile capacity versus control concrete