GEOGRID REINFORCED COMPACTABLE ASPHALTIC CONCRETE COMPOSITE, AND METHOD OF FORMING THE COMPOSITE
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United States of America Patent
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Issued Date -
Apr 25, 2013
app pub date -
Oct 15, 2012
filing date -
Oct 14, 2011
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Abandoned
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Abstract
A geogrid reinforced compactable asphaltic concrete composite includes a bottom layer, a first compacted layer of asphaltic concrete, a triaxial geogrid, and a second compacted layer of asphaltic concrete. The first layer and the second layer each include an aggregate having sharp, compound edges, which when mixed in asphaltic cement, create an aggregate interlock within the triaxial geogrid that provides strength to a paved surface. As a result of the triangular aperture geometry of the triaxial geogrid, the geogrid provides an asphalt lateral confinement zone within the composite. The zone allows for the formation of transverse hairline cracks as stresses on the composite necessitate. At elevated temperatures, the asphaltic cement softens and flows into the small transverse cracks, thus enabling the asphalt mats to substantially reseal themselves.
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