Effect of Oxidative Aging on Dynamic Modulus of Hot-Mix Asphalt MixturesSource: Journal of Materials in Civil Engineering:;2019:;Volume ( 031 ):;issue: 001Author:Yong Wen; Yuhong Wang
DOI: 10.1061/(ASCE)MT.1943-5533.0002547Publisher: American Society of Civil Engineers
Abstract: The dynamic modulus (|E*|) of asphalt mixtures is an important parameter in pavement design and analysis. Although the |E*| values of freshly prepared hot-mix asphalt (HMA) mixtures can be conveniently determined through laboratory tests, the |E*| values of field pavements continuously evolve as asphalt binder ages, and hence are difficult to determine. To examine the effects of asphalt binder aging on the |E*| of asphalt mixtures, a new piece of equipment is developed for the accelerated aging treatment of compacted asphalt mixture specimens. A set of small-size sampling, binder extraction, and recovery methods are used to determine the aging state of asphalt binder in asphalt mixtures. Three types of asphalt mixtures with different aging states are used to study the effects of aging on the |E*| changes. In addition, based on the |E*| test results, mixtures’ volumetric properties, and binders’ rheological properties at different aging states, the accuracy and robustness of six commonly used |E*| prediction models are compared. The developed equipment and method are anticipated to assist with the characterization of aged asphalt mixtures and the further improvement of |E*| prediction models.
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contributor author | Yong Wen; Yuhong Wang | |
date accessioned | 2019-03-10T12:17:43Z | |
date available | 2019-03-10T12:17:43Z | |
date issued | 2019 | |
identifier other | %28ASCE%29MT.1943-5533.0002547.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4255276 | |
description abstract | The dynamic modulus (|E*|) of asphalt mixtures is an important parameter in pavement design and analysis. Although the |E*| values of freshly prepared hot-mix asphalt (HMA) mixtures can be conveniently determined through laboratory tests, the |E*| values of field pavements continuously evolve as asphalt binder ages, and hence are difficult to determine. To examine the effects of asphalt binder aging on the |E*| of asphalt mixtures, a new piece of equipment is developed for the accelerated aging treatment of compacted asphalt mixture specimens. A set of small-size sampling, binder extraction, and recovery methods are used to determine the aging state of asphalt binder in asphalt mixtures. Three types of asphalt mixtures with different aging states are used to study the effects of aging on the |E*| changes. In addition, based on the |E*| test results, mixtures’ volumetric properties, and binders’ rheological properties at different aging states, the accuracy and robustness of six commonly used |E*| prediction models are compared. The developed equipment and method are anticipated to assist with the characterization of aged asphalt mixtures and the further improvement of |E*| prediction models. | |
publisher | American Society of Civil Engineers | |
title | Effect of Oxidative Aging on Dynamic Modulus of Hot-Mix Asphalt Mixtures | |
type | Journal Paper | |
journal volume | 31 | |
journal issue | 1 | |
journal title | Journal of Materials in Civil Engineering | |
identifier doi | 10.1061/(ASCE)MT.1943-5533.0002547 | |
page | 04018348 | |
tree | Journal of Materials in Civil Engineering:;2019:;Volume ( 031 ):;issue: 001 | |
contenttype | Fulltext |