|Table of Contents|

[1] Zhang Yao, Huang Xiaoming, Ma Tao, Zhang Deyu, et al. Simulation of meso factors influencing fracture performanceof dense-graded asphalt concrete at low temperature [J]. Journal of Southeast University (English Edition), 2017, 33 (3): 293-300. [doi:10.3969/j.issn.1003-7985.2017.03.007]
Copy

Simulation of meso factors influencing fracture performanceof dense-graded asphalt concrete at low temperature()
细观因素对密级配沥青混合料低温断裂试验的 影响仿真模拟研究
Share：

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
33
Issue:
2017 3
Page:
293-300
Research Field:
Civil Engineering
Publishing date:
2017-09-30

Info

Title:
Simulation of meso factors influencing fracture performanceof dense-graded asphalt concrete at low temperature
细观因素对密级配沥青混合料低温断裂试验的 影响仿真模拟研究
Author(s):
Zhang Yao1;  Huang Xiaoming1;  Ma Tao1;  Zhang Deyu2
1School of Transportation, Southeast University, Nanjing 210096, China
2School of Architecture Engineering, Nanjing Institute of Technology, Nanjing 211167, China
张垚1;  黄晓明1;  马涛1;  张德育2
1东南大学交通学院, 南京 210096; 2南京工程学院建筑工程学院, 南京 211167
Keywords:
asphalt mixture;  fracture property;  low temperature;  virtual test;  PFC3D;  influence factors
沥青混合料;  断裂性能;  低温;  虚拟试验;  PFC3D;  影响因素
PACS:
TU414
DOI:
10.3969/j.issn.1003-7985.2017.03.007
Abstract:
In order to characterize the impacts of key factors on the low-temperature fracture performance of dense-graded asphalt concrete, the virtual bending fracture test is simulated by using the discrete element method(DEM)and emulation software PFC3D(particle flow code in three-dimension). A virtual specimen generation procedure consisting of aggregate gradation, irregular clumps, asphalt mortar and air void content is performed based on the random generation algorithm and irregular coarse aggregates library. Then, the virtual fracture test is conducted after adding the micro mechanical contact models to the specimen, and the validity of virtual modeling is verified by the comparison of simulation test data and lab test data. Additionally, an orthogonal test is designed to investigate the impacts of the volume fraction of coarse aggregates and air voids, stiffness of coarse aggregates and asphalt mortar, internal bond strength of asphalt mortar and distribution of coarse aggregates and air voids on low-temperature fracture performance based on virtual simulation. The results show that all the factors have effects on fracture performance to various degrees, while the value of the bond strength of asphalt mortar is found to be the most important determinant of tensile strength and strain-energy density. The volume fraction of coarse aggregates is considered to be the most important determinant of tensile strain. Therefore, to obtain a high low-temperature fracture performance of dense-graded asphalt concrete, it is important to consider the microstructure and properties of asphalt mortar and aggregates.
为了研究关键因素对密级配沥青混凝土低温断裂性能的影响, 采用离散单元法(DEM)和三维颗粒流程序PFC3D模拟弯曲断裂试验.基于随机生成算法和虚拟不规则粗集料库模拟集料级配和不规则形状、沥青砂浆以及空隙率的生成过程.然后, 在虚拟试件中添加细观力学接触本构模型进行虚拟断裂试验, 虚拟试验结果与室内试验结果对比验证了虚拟试验结果的有效性.此外, 基于虚拟仿真采用正交试验研究集料和空隙的体积分数、集料和沥青砂浆的刚度、沥青砂浆内部粘结强度以及集料和空隙的分布对虚拟断裂试验的影响.研究表明, 上述因素对断裂性能都有不同程度的影响, 其中对弯拉强度和弯曲应变能密度影响最大的是沥青砂浆的粘结强度, 对弯拉应变影响最大的是粗集料的体积分数.为了得到较好的密级配沥青混合料低温断裂性能, 考虑沥青砂浆和集料的细观结构非常重要.

References:

[1] Kim K W, El Hussein M. Variation of fracture toughness of asphalt concrete under low temperatures[J]. Construction and Building Materials, 1997, 11(7): 403-411. DOI:10.1016/s0950-0618(97)00030-5.
[2] Li X, Marasteanu M. The fracture process zone in asphalt mixture at low temperature[J]. Engineering Fracture Mechanics, 2010, 77(7): 1175-1190. DOI:10.1016/j.engfracmech.2010.02.018.
[3] Yang J, Jiao L, Wang K, et al. Three dimensional simulation of virtual triaxial shear test for asphalt mixture based on discrete element method[J]. Journal of Southeast University(Natural Science Edition), 2014, 44(5): 1057-1061. DOI:10.3969/j.issn.1001-0505.2014.05.032. (in Chinese)
[4] Liu Q, Cao D. Research on material composition and performance of porous asphalt pavement[J]. Journal of Materials in Civil Engineering. 2009, 21(4): 135-140. DOI:10.1061/(asce)0899-1561(2009)21:4(135).
[5] Jiang X, Qian Z, Song X. Experimental study on virtual fracture of epoxy asphalt concrete based on discrete element method[J]. Journal of Southeast University(Natural Science Edition), 2014, 44(1): 173-177. DOI:10.3969/j.issn.1001-0505.2014.01.031. (in Chinese)
[6] Wagoner M, Buttlar W, Paulino G, et al. Development of a single-edge notched beam test for asphalt concrete mixtures[J]. Journal of Testing and Evaluation, 2005, 33(6): 452-460. DOI:10.1520/jte12579.
[7] Wagnoner M P, Buttlar W G, Paulino G H. Disk-shaped compact tension test for asphalt concrete fracture[J].Experimental Mechanics, 2005, 45(3): 270-277. DOI:10.1007/bf02427951.
[8] Kim H, Wagoner M P, Buttlar W G. Simulation of fracture behavior in asphalt concrete using a heterogeneous cohesive zone discrete element model[J]. Journal of Materials in Civil Engineering, 2008, 20(8): 552-563. DOI:10.1061/(asce)0899-1561(2008)20:8(552).
[9] Kim H, Buttlar W G. Discrete fracture modeling of asphalt concrete[J]. International Journal of Solids and Structures, 2009, 46(13): 2593-2604. DOI:10.1016/j.ijsolstr.2009.02.006.
[10] Chen J, Pan T, Huang X. Discrete element modeling of asphalt concrete cracking using a user-defined three-dimensional micromechanical approach[J]. Journal of Wuhan University of Technology-Mater Sci Ed, 2011, 26(6): 1215-1221. DOI:10.1007/s11595-011-0393-z.
[11] Mahmoud E, Masad E, Nazarian S. Discrete element analysis of the influences of aggregate properties and internal structure on fracture in asphalt mixtures[J]. Journal of Materials in Civil Engineering, 2010, 22(1): 10-20. DOI:10.1061/(asce)mt.1943-5533.0000005.
[12] Wang J, Qian Z, Wang L. Three-dimensional fracture modeling of epoxy asphalt concrete using a heterogeneous iscrete element model[C]//Transportation Research Board 92nd Annual Meeting. Washington, DC, USA, 2013:13-2994.
[13] Eckwright F, Jung S J, Abdo A M A. Utilizing a particle flow code in 2 dimensional discrete element method of fracture resistance evaluation of HMA and brittle rock[J]. Asian Journal of Civil Engineering, 2014, 15(1):9-21.
[14] Yang X, Dai Q, You Z, et al. Integrated experimental-numerical approach for estimating asphalt mixture induction healing level through discrete element modeling of a single-edge notched beam test[J]. Journal of Materials in Civil Engineering, 2015, 27(9): 04014259. DOI:10.1061/(asce)mt.1943-5533.0001231.
[15] Chen J, Wang L B, Huang X M. Micromechanical modeling of asphalt concrete fracture using a user-defined three-dimensional discrete element method [J]. Journal of Central South University, 2012, 19(12): 3595-3602. DOI:10.1007/s11771-012-1447-x.
[16] Kwan A K H, Mora C F. Effects of various shape parameters on packing of aggregate particles[J]. Magazine of Concrete Research, 2001, 53(2): 91-100. DOI:10.1680/macr.2001.53.2.91.
[17] Rocco C G, Elices M. Effect of aggregate shape on the mechanical properties of a simple concrete[J].Engineering Fracture Mechanics, 2009, 76(2): 286-298. DOI:10.1016/j.engfracmech.2008.10.010.
[18] Jin C, Yang X, You Z. Automated real aggregate modelling approach in discrete element method based on X-ray computed tomography images[J]. International Journal of Pavement Engineering, 2015, 18(9): 837-850. DOI:10.1080/10298436.2015.1066006.

Memo

Memo:
Biographies: Zhang Yao(1992—), female, graduate; Huang Xiaoming(corresponding author), male, doctor, professor, huangxm@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51378006, 51378121).
Citation: Zhang Yao, Huang Xiaoming, Ma Tao, et al.Simulation of meso factors influencing fracture performance of dense-graded asphalt concrete at low temperature[J].Journal of Southeast University(English Edition), 2017, 33(3):293-300.DOI:10.3969/j.issn.1003-7985.2017.03.007.
Last Update: 2017-09-20