Louisiana constructed two hot mix recycling projects in 1978 in order to determine the feasibility of this technology with respect to design and construction. In 1980-81 four recycled projects were constructed to examine the variations found in recycled asphaltic concrete mixtures based upon plant quality control data and verification testing. This report presents the results of a follow-up study which examined the performance of five of these projects with five conventional construction projects utilized as a control.
The five year laboratory and field evaluation examined performance from structural, serviceability and distress perspectives. Structural integrity was evaluated with the Dynaflect; the Mays Ridemeter determined the serviceability index; and, a pavement distress type and severity rating was conducted which included such indicators as rutting, ravelling, cracking and patching. Also, materials from each roadway were sampled to determine mix densification and the asphalt binder quality as measured by absolute viscosity, penetration and ductility.
After nine years (one project) and six years (four projects) of service life, the recycled pavements have demonstrated the ability to perform similarly to the conventional hot-mix.
This is part I of a two part final report on expanded clay hot mix to: (1) evaluate the use of various expanded clay bituminous mixtures under high tr...
This research is part of the series of investigated topics surrounding hot mix asphalt in Connecticut.This research investigates the performance of se...
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