A Laboratory Investigation into the Effects of Coarse Aggregate Angularity on Performance of WMA

This study evaluated the effects of coarse aggregate angularity (CAA) on the performances of warm mix asphalt (WMA) because previous studies have predominantly focused on the effects of CAA on the hot mix asphalt (HMA) performances. Five different CAAs were fabricated using Los Angeles abrasion test...

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Main Authors: Jie Ji, Peng Zhai, Wenhua Zheng, Zhi Suo, Ying Xu
Format: Article
Language:English
Published: Wiley 2018-01-01
Series:Advances in Materials Science and Engineering
Online Access:http://dx.doi.org/10.1155/2018/1326945
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author Jie Ji
Peng Zhai
Wenhua Zheng
Zhi Suo
Ying Xu
author_facet Jie Ji
Peng Zhai
Wenhua Zheng
Zhi Suo
Ying Xu
author_sort Jie Ji
collection DOAJ
description This study evaluated the effects of coarse aggregate angularity (CAA) on the performances of warm mix asphalt (WMA) because previous studies have predominantly focused on the effects of CAA on the hot mix asphalt (HMA) performances. Five different CAAs were fabricated using Los Angeles abrasion test, and the digital image processing method was used to identify the CAA. Five mixes with different combinations of CAA and Sasobit-modified asphalt binder were prepared according to the Marshall mix design procedure. The performances such as the resistance to rutting and thermal cracking, moisture susceptibility, and volumetric characteristics of WMA were evaluated. The test results indicated that the CAA value was linearly declined with the abrasive wearing passes increased. Higher CAA value improved the potential to resistance to rutting of WMA but was not suitable to enhance the resistance to thermal cracking of WMA due to sharp corners that caused higher stress concentration. In addition, WMA was more prone to develop numerous macrocracking, which resulted in lower moisture susceptibility due to higher CAA value inducing higher air void, VMA, and VCA of WMA.
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spelling doaj-art-6c2da04bb83c40dd9fa5d0d4adfe9b722025-02-03T05:43:35ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/13269451326945A Laboratory Investigation into the Effects of Coarse Aggregate Angularity on Performance of WMAJie Ji0Peng Zhai1Wenhua Zheng2Zhi Suo3Ying Xu4School of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaSchool of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaSchool of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaSchool of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaSchool of Civil Engineering and Transportation, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaThis study evaluated the effects of coarse aggregate angularity (CAA) on the performances of warm mix asphalt (WMA) because previous studies have predominantly focused on the effects of CAA on the hot mix asphalt (HMA) performances. Five different CAAs were fabricated using Los Angeles abrasion test, and the digital image processing method was used to identify the CAA. Five mixes with different combinations of CAA and Sasobit-modified asphalt binder were prepared according to the Marshall mix design procedure. The performances such as the resistance to rutting and thermal cracking, moisture susceptibility, and volumetric characteristics of WMA were evaluated. The test results indicated that the CAA value was linearly declined with the abrasive wearing passes increased. Higher CAA value improved the potential to resistance to rutting of WMA but was not suitable to enhance the resistance to thermal cracking of WMA due to sharp corners that caused higher stress concentration. In addition, WMA was more prone to develop numerous macrocracking, which resulted in lower moisture susceptibility due to higher CAA value inducing higher air void, VMA, and VCA of WMA.http://dx.doi.org/10.1155/2018/1326945
spellingShingle Jie Ji
Peng Zhai
Wenhua Zheng
Zhi Suo
Ying Xu
A Laboratory Investigation into the Effects of Coarse Aggregate Angularity on Performance of WMA
Advances in Materials Science and Engineering
title A Laboratory Investigation into the Effects of Coarse Aggregate Angularity on Performance of WMA
title_full A Laboratory Investigation into the Effects of Coarse Aggregate Angularity on Performance of WMA
title_fullStr A Laboratory Investigation into the Effects of Coarse Aggregate Angularity on Performance of WMA
title_full_unstemmed A Laboratory Investigation into the Effects of Coarse Aggregate Angularity on Performance of WMA
title_short A Laboratory Investigation into the Effects of Coarse Aggregate Angularity on Performance of WMA
title_sort laboratory investigation into the effects of coarse aggregate angularity on performance of wma
url http://dx.doi.org/10.1155/2018/1326945
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