01506445

Component

https://doi.org/10.3141/2408-08

http://scholar.google.com...Timm&publication_year=2014

Adequate control of temperatures during compaction is a critical factor in the achievement of proper densification of asphalt concrete (AC) layers. As the mat cools down, the viscosity of the asphalt binder increases; this increased viscosity reduces the compaction capability of the asphalt mixture. To assist paving contractors in their estimation of the cooling rate of asphalt pavements, the MultiCool program uses a heat transfer model that predicts the time window for successful compaction. Although this program has been validated for a variety of hot- and warm-mix asphalt technologies, further validation is needed on additional sustainable asphalt mixture technology. Pavement sections built in 2012 at the National Center for Asphalt Technology Pavement Test Track were used to perform a validation study to assess the effect of sustainable technologies [e.g., reclaimed asphalt pavements, recycled asphalt shingles (RAS), ground tire rubber (GTR) modified binders, and foamed cold-mix (FCM) bases] on the cooling rate of AC and the time available for compaction. Results revealed that the MultiCool model was a fair predictor of the measured temperatures. However, the use of RAS, GTR-modified binders, and a FCM base had a direct effect on the temperature predictions. This effect warrants further investigation of the possible effects of RAS, GTR-modified binders, and FCM base on the thermal properties of asphalt mixtures.

01534208

14-0689

English

pp 69–77

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309294997

Print

Figures (7) ; References (18) ; Tables (1)

Asphalt concrete; Asphalt pavements; Compaction; Computer programs; Cooling; Crumb rubber; Foamed asphalt; Paving; Reclaimed asphalt pavements; Shingles; Temperature; Validation

Construction; Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings

TRIS, TRB, ATRI

Jan 27 2014 2:18PM

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• Indefinite Delivery–Indefinite Quantity Contracting: Case Study Analysis
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