Mechanistic Fatigue Performance Evaluation of Stone Mastic Asphalt Mixtures: Effect of Asphalt Performance Grade and Elastic Recovery

Author:

Lee Jongsub1ORCID,Lee Sungjin2,Hwang Yujoong1,Kwon Ohsun1,Yeon Gyumin1ORCID

Affiliation:

1. Pavement Research Division, Korea Expressway Corporation Research Institute, Hwaseong 18489, Republic of Korea

2. Joongbu Division North Gyeonggi Center, Korea Conformity Laboratories, Chuncheon 24341, Republic of Korea

Abstract

This study evaluates the crack performance of stone mastic asphalt (SMA) mixtures according to the performance of a modified asphalt binder, evaluated based on the asphalt performance grade (PG) and the elastic recovery of multiple stress creep and recovery (MSCR) according to AASHTO M 320 and T 350. The cracking performance of the mixture was evaluated using the asphalt mixture performance tester (AMPT) according to AASHTO T 378 and T 400 through dynamic modulus and direct tension cyclic fatigue tests. Furthermore, the recently developed viscoelastic continuum damage (VECD) theory was utilized to evaluate the cyclic fatigue index parameter (apparent damage capacity, Sapp) and the permissible heavy vehicle class. For performance evaluation, six modified asphalt mixtures were prepared and tested using SMA aggregate gradation with a nominal maximum aggregate size (NMAS) of 10 mm. The MSCR test results revealed that, of the six asphalt mixtures, the rubber-based PG76-28 exhibited the least initial strain and the highest elastic recovery. The dynamic modulus test results demonstrated that using a rubber-based modifier increased the elastic modulus at high temperatures and decreased it at low temperatures, thereby enhancing resistance to plastic deformation in the summer and reducing low-temperature cracking in the winter. Finally, the correlation between the Sapp performance index and the elastic recovery of modified asphalt and the number of direct tension cyclic loads until failure of the mixture was evaluated as 0.87 and 0.76, respectively.

Funder

Korea Expressway Corporation Research Institute

Publisher

MDPI AG

Reference22 articles.

1. Federal Highway Administration (2024, June 23). Asphalt Production and Oil Refining. Available online: https://pavementinteractive.org/reference-desk/materials/asphalt/asphalt-production-and-oil-refining/.

2. (2006). Volumetric Requirements for Superpave Mix Design, Transportation Research Board of the National Academies. NCHRP 567 Final Report.

3. (2023). Standard Specification for Performance-Graded Asphalt Binder (Standard No. AASHTO M320).

4. (2023). Standard Method of Test for Multiple Stress Creep Recovery (MSCR) Using a Dynamic Shear Rheometer (DSR) (Standard No. AASHTO T350).

5. (2011). The Multiple Stress Creep Recovery Procedure, U.S. Department of Transportation, Federal Highway Administration. FHWA Tech Brief.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3