[1] Aysar Najd, Zheng Chuanchao,. Measuring crack propagation in reinforced asphalt concretes [J]. Journal of Southeast University (English Edition), 2005, 21 (3): 342-347. [doi:10.3969/j.issn.1003-7985.2005.03.019]

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Measuring crack propagation in reinforced asphalt concretes()

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

Volumn:

21

Issue:

2005 3

Page:

342-347

Research Field:

Traffic and Transportation Engineering

Publishing date:

2005-09-30

Info

Title:

Measuring crack propagation in reinforced asphalt concretes

Author(s):

Aysar Najd;  Zheng Chuanchao

Key Laboratory for Special Area of Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China

Keywords:

highway engineering;  hot mixture asphalt(HMA);  crack propagation;  fracture mechanics;  critical stress intensity factor

PACS:

U41

DOI:

10.3969/j.issn.1003-7985.2005.03.019

Abstract:

Two different reinforcing methodologies are applied:modification of the overlay characteristics by adding chopped glass fibers to the hot mixture asphalt(HMA)and reinforcing asphalt overlay with glass grids.Theory of fracture mechanics(FM)is employed to determine crack growth rates for the suggested anti-cracking overlay systems.Asphalt mixture designing tests, three point bending tests and fatigue crack propagation tests were carried out.The critical stress intensity factors K_IC are determined for plain and reinforced asphalt concrete.Depending on the fatigue crack propagation, the crack growth rate is determined for each type of anti-cracking system and the cracking process is also analyzed.One of the significant points in this study is the attempt to give better understanding of the crack propagation for multilayer asphaltic overlay or what are suggested herein to be called composite structure anti-cracking overlay system.The results indicate that the reinforcing materials improve anti-cracking characteristics of the asphalt concrete.Composite structure anti-cracking overlay gives a good solution for the reflective cracking phenomenon over old cracked pavements.

References:

[1] Lytton R L.Use of geotextiles for reinforcement and strain relief in asphalt concrete [J].Geotextiles and Geomembranes, 1989, 8(3):217-238.
[2] Read J M.New method for measuring crack propagation in asphalt concrete [J].International Journal for Pavement Engineering, 2000, 1(1):15-35.
[3] Rigo J M.General introduction, main conclusions of the 1989 conference on reflective cracking in pavements [A].In:The Second International Conference on Reflective Cracking in Pavement [C].Belgium:Liege University, 1993.3-20.
[4] Ye Guozhong.Fatigue shear and fracture behavior of rubber bituminous pavement [A].In:The Third International RILEM Conference on Reflective Cracking in Pavements [C].Netherlands, 1996.168-175.
[5] Hao Peiwen, Zhang Dengliang, Hu Xining.Evaluation method for low temperature anti-cracking performance of asphalt mixture [J].Journal of Xi’an Highway University, 2000, 20(3):1-5.(in Chinese)
[6] Department of Scientific Research of the Aminitry of Transportion.Highway engineering laboratorial norms [M].Beijing:China Communications Press, 2001.(in Chinese)
[7] Zhang Dengliang.Asphalt pavements engineering handbook [M].Beijing:China Communications Press, 2003.(in Chinese)

Memo

Memo:

Biography: Aysar Najd(1972—), male, Syrian, graduate, aysar2002@hotmail.com.

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