TY - JOUR

T1 - Dynamic Strength Analysis of Bitumen Binders for Asphalt Concrete Mixtures in Terms of the Fracture Incubation Time Criterion

AU - Smirnov, I. V.

AU - Петров, Юрий Викторович

N1 - Publisher Copyright: © 2020, Pleiades Publishing, Ltd. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2020/11

Y1 - 2020/11

N2 - Abstract: The operating conditions of currenthighways require the development and implementation of newtesting standards for pavement materials with regard to dynamicimpact. Pavement materials have a complex hierarchical structureexhibiting a self-consistent response to load at different scalelevels. The corresponding parameters of the phenomenologicalmodels used for macroscopic objects essentially depend onlower-scale processes, and this relationship determines thebehavior and strength of the material under both static anddynamic loading. This paper reports dynamic test results forsome bitumen binders and asphalt concrete, and provides theiranalysis on the basis of the incubation time criterion. Thetests were conducted using a split Hopkinson pressure bar onmaterials previously exposed to room or negative (–10°C)temperature. Experimental data showed that thestructural-temporal approach based on the concept of theincubation time of fracture can be a good tool for analyzing andpredicting the dynamic strength effects of pavement materials.Since the fracture incubation time characterizes the duration ofmacrofracture preparation processes at different scale levels,control over this parameter through the structural features ofthe material can provide the desired material response todynamic load. The proposed structural-temporal parameters can beincorporated into new standards developed with the idea of adifferential choice of materials depending on the expectedhighway operating conditions.

AB - Abstract: The operating conditions of currenthighways require the development and implementation of newtesting standards for pavement materials with regard to dynamicimpact. Pavement materials have a complex hierarchical structureexhibiting a self-consistent response to load at different scalelevels. The corresponding parameters of the phenomenologicalmodels used for macroscopic objects essentially depend onlower-scale processes, and this relationship determines thebehavior and strength of the material under both static anddynamic loading. This paper reports dynamic test results forsome bitumen binders and asphalt concrete, and provides theiranalysis on the basis of the incubation time criterion. Thetests were conducted using a split Hopkinson pressure bar onmaterials previously exposed to room or negative (–10°C)temperature. Experimental data showed that thestructural-temporal approach based on the concept of theincubation time of fracture can be a good tool for analyzing andpredicting the dynamic strength effects of pavement materials.Since the fracture incubation time characterizes the duration ofmacrofracture preparation processes at different scale levels,control over this parameter through the structural features ofthe material can provide the desired material response todynamic load. The proposed structural-temporal parameters can beincorporated into new standards developed with the idea of adifferential choice of materials depending on the expectedhighway operating conditions.

KW - Asphalt concrete

KW - Bitumen

KW - Dynamic loading

KW - Dynamic strength

KW - Incubation time criterion

KW - Strain rate dependence of strength

UR - http://www.scopus.com/inward/record.url?scp=85101884115&partnerID=8YFLogxK

U2 - 10.1134/S1029959920060090

DO - 10.1134/S1029959920060090

M3 - Article

AN - SCOPUS:85101884115

VL - 23

SP - 538

EP - 546

JO - Physical Mesomechanics

JF - Physical Mesomechanics

SN - 1029-9599

IS - 6

ER -