Analysis of viscoelastic behaviour in asphalt pavement through four-point beam bending tests
Hamza Jamal
CECOS University of IT and Emerging Sciences; (Pakistan)
https://orcid.org/0009-0001-1517-0518
Rawid Khan
Department of Civil Engineering; UET Peshawar; (Pakistan)
Diyar Khan
diyarkhan1000@gmail.coma:1:{s:5:"en_US";s:33:"Silesian University of Technology";} (Poland)
https://orcid.org/0000-0002-5810-9012
Manzoor Elahi
Department of Civil Engineering; UET Peshawar; (Pakistan)
Muhammad Tariq Bashir
CECOS University of IT and Emerging Sciences; (Pakistan)
https://orcid.org/0000-0002-8769-9875
Asmat Khan
Department of Transportation Engineering; Military College of Engineering; (Pakistan)
Waseem Akhtar Khan
Department of Civil Engineering; University of Louisiana at Lafayette; (United States)
https://orcid.org/0009-0002-8467-2295
Abstract
This study, conducted in accordance with ASTM T321-14 standards, offers crucial insights into the behaviour of asphalt materials subjected to cyclic loading. For proper maintenance and pavement design, it is essential to understand the material response under different loading conditions. This study focuses on the four-point beam bending test to investigate the viscoelastic behaviour of asphalt pavement. The four-point beam bending test is a useful method for determining the material's ability to withstand cyclic loading and deformation, which the material experiences during field traffic conditions. The experimental setup involves subjecting asphalt samples to cyclic loading using a four-point bending apparatus. The imposed load causes the specimen to experience bending strains, representing the actual loading conditions that pavements endure. The data gathered during testing include stress, strain, and deformation properties under various loading conditions. The stress-strain response demonstrates the material's resilience to fatigue, with a gradual decrease in stiffness beyond 10,300 cycles. Fatigue failure criteria include a 50% reduction in initial stiffness for strain-controlled fatigue tests and cracking in stress-controlled tests. The dynamic modulus in a compressive-type, repeated load test follows a three-phase pattern, highlighting the impact of temperature and binder characterization methods on sample performance. The results provide information about the material's resilience to rutting and fatigue cracking, the most significant distresses indicated in asphalt pavements. The findings from this study contribute to an in-depth understanding of the viscoelastic behaviour of asphalt pavement and can aid in the development of improved design guidelines and maintenance strategies characterizing the material response to cyclic loading. Engineers and researchers can make better decisions on the durability and performance of asphalt pavements, resulting in more cost-effective and sustainable road infrastructure.
Keywords:
asphalt mixture, deformation properties, four-point beam, fatigue cracking, dynamic modulusReferences
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Authors
Hamza JamalCECOS University of IT and Emerging Sciences; Pakistan
https://orcid.org/0009-0001-1517-0518
Authors
Rawid KhanDepartment of Civil Engineering; UET Peshawar; Pakistan
Authors
Diyar Khandiyarkhan1000@gmail.com
a:1:{s:5:"en_US";s:33:"Silesian University of Technology";} Poland
https://orcid.org/0000-0002-5810-9012
Authors
Manzoor ElahiDepartment of Civil Engineering; UET Peshawar; Pakistan
Authors
Muhammad Tariq BashirCECOS University of IT and Emerging Sciences; Pakistan
https://orcid.org/0000-0002-8769-9875
Authors
Asmat KhanDepartment of Transportation Engineering; Military College of Engineering; Pakistan
Authors
Waseem Akhtar KhanDepartment of Civil Engineering; University of Louisiana at Lafayette; United States
https://orcid.org/0009-0002-8467-2295
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