Development of an estimative model for the optimal tack coat dosage based on aggregate gradation of hot mix asphalt pavements

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Authors
Raposeiras, A. C.
Rojas Mora, J.
Piffaut, E.
Movilla Quesada, D.
Castro Fresno, D.
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CONSTRUCTION AND BUILDING MATERIALS,Vol.118,1-10,2016
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Abstract
In this work the performance of tack coats on asphalt pavement layers is analysed. Adjustment models based on experimental measurements were implemented, relating surface layer macro-texture and aggregate content larger than 8 mm. The best fits were obtained with a Gompertz model, which follows the expected physical macro-texture changes outside the test range. Shear strength was analysed, through prediction curves of each evaluated tack coat dosage, with an optimum tack coat performance for aggregate contents larger than 8 mm between 45% and 50%, and no relevant influence of the tack coat dosage used. (C) 2016 Elsevier Ltd. All rights reserved.
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