Dry-cast hollowcore concrete sandwich panels
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United States of America Patent
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Mar 30, 2004
Grant Date -
N/A
app pub date -
Jun 7, 2001
filing date -
Jun 7, 2001
priority date (Note) -
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Abstract
A concrete sandwich panel is provided with a first dry-cast hollowcore concrete layer having pre-stressing strands, and a second concrete layer, and an insulation layer sandwiched therebetween. The insulation layer includes pre-formed holes. A tool is used to form holes in the first concrete layer aligned with the insulation holes. Adhesive is injected into the concrete holes, with connectors extending through the insulation layer and into the concrete holes. The adhesive, when cured, locks the connector in the hollowcore concrete layer. The upper concrete layer is cast over the insulation layer so as to embed the upper ends of the connectors. The plasticity of the upper concrete layer, which may result from vibration energy input to low-slump concrete, allows the concrete to consolidate around the upper ends of the connectors. When the concrete layers cure, the connectors tie the layers together to preclude excessive shear displacement between the concrete.
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