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Author:

Tan, Zhifei (Tan, Zhifei.) | Leng, Zhen (Leng, Zhen.) | Jiang, Jiwang (Jiang, Jiwang.) | Cao, Peng (Cao, Peng.) | Jelagin, Denis (Jelagin, Denis.) | Li, Gaoyang (Li, Gaoyang.) | Sreeram, Anand (Sreeram, Anand.)

Indexed by:

EI Scopus SCIE

Abstract:

Asphalt concrete (AC) is a composite material consisting of binder, aggregates and air voids. The quantitative effect of aggregate-to-aggregate contact on the mechanical performance of AC is an important and complex issue, which has not been fully understood yet. To fill this gap, this study aims to characterize the aggregate contacts in AC and evaluate their effects on the viscoelastic behavior of AC through micromechanical finite element (FE) modeling. To this end, 3D microstructural models were generated through digital image processing (DIP) method and aggregate contacts were captured in the model via contact zone (CZ) elements. A CZ model was proposed and verified by a parametric study to identify the viscoelastic properties of CZ elements, while the viscoelastic properties of matrix phase were determined through laboratory tests. Steady-state dynamic (SSD) analysis was then conducted to investigate the macro-scale viscoelastic response of AC. It was found that the proposed modeling approach captures the measured response accurately. Accounting for aggregate contacts results in higher predicted AC dynamic moduli and lower phase angles, thus improving the agreement between modeling and experimental results. The numerical model developed in this study provides a promising approach for investigating the effect of aggregate contacts on the mechanical performance of AC. (c) 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Keyword:

Steady-state dynamics Complex modulus Aggregate contacts Finite element analysis

Author Community:

  • [ 1 ] [Tan, Zhifei]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
  • [ 2 ] [Leng, Zhen]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
  • [ 3 ] [Jiang, Jiwang]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
  • [ 4 ] [Li, Gaoyang]Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
  • [ 5 ] [Cao, Peng]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing, Peoples R China
  • [ 6 ] [Jelagin, Denis]KTH Royal Inst Technol, Dept Civil & Architectural Engn, Brinellvagen 23, S-10044 Stockholm, Sweden
  • [ 7 ] [Sreeram, Anand]Univ Texas Austin, Dept Civil Architectural & Environm Engn, Austin, TX USA

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Source :

MATERIALS & DESIGN

ISSN: 0264-1275

Year: 2021

Volume: 213

8 . 4 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:116

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 25

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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