Experimental installation of geosynthetic pavement reinforcement to reduce reflective cracking.
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2007-09-01
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Abstract:In October of 200 the MaineDOT experimented with the use of a geosynthetic pavement reinforcement
fabric on runway 1735 of the AuburnLewiston Municipal Airport. The goal of the experiment was to determine the effectiveness of the fabric in reducing reflective cracking of the HMA overlay.
Reflective cracking is the propagation of existing cracks from the older pavement layer into the
overlay. Reflective cracking is caused by increased shear and tensile stresses in the overlay induced by
movements in the underlying pavement. Geosynthetic fabric is placed over a crack to better distribute
these increased shear and tensile stresses. Reducing these stresses hopefully prevents the propagation of existing cracks into the overlay.
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