High-Modulus Asphalt Mixtures Modified with Acrylic Fibers for Their Use in Pavements under Severe Climate Conditions
Publication: Journal of Cold Regions Engineering
Volume 30, Issue 4
Abstract
Asphalt pavement properties (strength, durability, bearing capacity, etc.) are considerably affected by environmental conditions. Because of this fact, regions with severe climates (high thermal gradients, abundant precipitation, presence of freeze-thaw cycles, solar radiation, etc.) have serious problems in maintaining the functional integrity of these infrastructures. Thus, it is necessary to develop new materials that could extend the service life of these pavements without increasing the construction costs. Accordingly, the present paper studies the improvement of the mechanical performance of high-modulus asphalt mixtures through the addition of acrylic fibers, for their use under severe environmental conditions. For this purpose, different tests were carried out [thermal stress restrained specimen test, immersed wheel-tracking test, freeze-thaw sensitivity test, and UGR-FACT (University of Granada-Fatigue Asphalt Cracking Test)] under variable conditions (simulating cold and hot scenarios). The results show that the use of acrylic fibers improves the mechanical behavior of high-modulus asphalt mixtures (at high and low temperatures, as well as under the presence of water and ice), and could thus be considered an interesting alternative for extending the service life of asphalt pavements in severe climates.
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Acknowledgments
The present study has been conducted within the framework of the FATE research project (Firmes Asfálticos para Temperaturas Extremas, IPT-2012-0977-370000), funded by the Ministry of Innovation and Science of Spain, inside the National Plan of Science Research, Development and Technological Innovation 2012–2015, and cofunded by the FEDER funds.
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Published In
Journal of Cold Regions Engineering
Volume 30 • Issue 4 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: May 28, 2015
Accepted: Feb 23, 2016
Published online: May 3, 2016
Discussion open until: Oct 3, 2016
Published in print: Dec 1, 2016
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