Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method
A three-dimensional (3D) microstructure-based discrete element (DE) model was developed to study the creep behaviour of high viscoelastic asphalt sand (HVAS) with the uniaxial compression creep tests. The three-point bending creep tests of asphalt mortar were carried out in order to obtain the param...
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doaj-95f2ee9275c147d987ffa480a4287bde2020-11-25T03:28:17ZengRTU PressThe Baltic Journal of Road and Bridge Engineering1822-427X1822-42882020-09-0115417419510.7250/bjrbe.2020-15.5002311Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element MethodYoulin Ye0Yazhen Sun1Lin Gao2Zhuang Ma3Xingwei Xue4School of Civil Engineering, Shenyang Jianzhu University, Shenyang, ChinaSchool of Transportation Engineering, Shenyang Jianzhu University, Shenyang, ChinaSchool of Civil Engineering, Chongqing University of Arts and Sciences, Chongqing, ChinaSchool of Transportation Engineering, Shenyang Jianzhu University, Shenyang, ChinaSchool of Transportation Engineering, Shenyang Jianzhu University, Shenyang, ChinaA three-dimensional (3D) microstructure-based discrete element (DE) model was developed to study the creep behaviour of high viscoelastic asphalt sand (HVAS) with the uniaxial compression creep tests. The three-point bending creep tests of asphalt mortar were carried out in order to obtain the parameters of the Burger model, to determine the transformation method of macroscopic parameters and microscopic parameters of the model in theory, to obtain the parameters used in the discrete element model, and then establish the discrete element analysis model for the asphalt mixture. A 3D-DE digital specimen was composed of coarse aggregates, asphalt mortar and air voids, which could also take gradation, irregular shape, random distribution of aggregate and air voids into consideration, and the boundary conditions of the model were set through the simulation of the uniaxial compression creep tests. An accurate and extensive mapping model of HVAS was built by 3D-PFC (Particle Flow Code), which can provide a simple alternative to the laboratory tests. This method can simulate a series of numerical examples based on different stress levels, coarse aggregate homogenizations, mortar homogenizations and temperatures in a single factor method. Comparison of results of laboratory and numerical tests shows that the 3D-PFC-viscoelastic model can reflect the creep mechanical behaviour of asphalt mixture accurately. It provides the theoretical basis and auxiliary means for analysing the mechanical properties of asphalt mixtures using PFC software. The research on creep behaviour of the asphalt mixture by numerical simulation opens up a new way for the research on creep behaviour of the asphalt mixture, it is of considerable theoretical value and has broad application prospects.https://bjrbe-journals.rtu.lv/article/view/4163asphalt mixturecreep behaviourheterogeneousmicro-scaleparticle flow discrete element software |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Youlin Ye Yazhen Sun Lin Gao Zhuang Ma Xingwei Xue |
spellingShingle |
Youlin Ye Yazhen Sun Lin Gao Zhuang Ma Xingwei Xue Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method The Baltic Journal of Road and Bridge Engineering asphalt mixture creep behaviour heterogeneous micro-scale particle flow discrete element software |
author_facet |
Youlin Ye Yazhen Sun Lin Gao Zhuang Ma Xingwei Xue |
author_sort |
Youlin Ye |
title |
Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method |
title_short |
Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method |
title_full |
Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method |
title_fullStr |
Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method |
title_full_unstemmed |
Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method |
title_sort |
study on creep behavior of asphalt mixture based on discrete element method |
publisher |
RTU Press |
series |
The Baltic Journal of Road and Bridge Engineering |
issn |
1822-427X 1822-4288 |
publishDate |
2020-09-01 |
description |
A three-dimensional (3D) microstructure-based discrete element (DE) model was developed to study the creep behaviour of high viscoelastic asphalt sand (HVAS) with the uniaxial compression creep tests. The three-point bending creep tests of asphalt mortar were carried out in order to obtain the parameters of the Burger model, to determine the transformation method of macroscopic parameters and microscopic parameters of the model in theory, to obtain the parameters used in the discrete element model, and then establish the discrete element analysis model for the asphalt mixture. A 3D-DE digital specimen was composed of coarse aggregates, asphalt mortar and air voids, which could also take gradation, irregular shape, random distribution of aggregate and air voids into consideration, and the boundary conditions of the model were set through the simulation of the uniaxial compression creep tests. An accurate and extensive mapping model of HVAS was built by 3D-PFC (Particle Flow Code), which can provide a simple alternative to the laboratory tests. This method can simulate a series of numerical examples based on different stress levels, coarse aggregate homogenizations, mortar homogenizations and temperatures in a single factor method. Comparison of results of laboratory and numerical tests shows that the 3D-PFC-viscoelastic model can reflect the creep mechanical behaviour of asphalt mixture accurately. It provides the theoretical basis and auxiliary means for analysing the mechanical properties of asphalt mixtures using PFC software. The research on creep behaviour of the asphalt mixture by numerical simulation opens up a new way for the research on creep behaviour of the asphalt mixture, it is of considerable theoretical value and has broad application prospects. |
topic |
asphalt mixture creep behaviour heterogeneous micro-scale particle flow discrete element software |
url |
https://bjrbe-journals.rtu.lv/article/view/4163 |
work_keys_str_mv |
AT youlinye studyoncreepbehaviorofasphaltmixturebasedondiscreteelementmethod AT yazhensun studyoncreepbehaviorofasphaltmixturebasedondiscreteelementmethod AT lingao studyoncreepbehaviorofasphaltmixturebasedondiscreteelementmethod AT zhuangma studyoncreepbehaviorofasphaltmixturebasedondiscreteelementmethod AT xingweixue studyoncreepbehaviorofasphaltmixturebasedondiscreteelementmethod |
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1724585254510919680 |