Investigating the mechanical properties and durability of Asphalt mixture modified with Epoxidized Natural Rubber (ENR) under short and long-term aging conditions
Modifiers such as fibers, fillers, natural and synthetic polymer extenders, oxidants and anti-oxidants, and anti-stripping agents are added to produce modified asphalt. However, polymers are the most widely utilized modifiers to enhance the function of asphalt mixtures. The objective of this rese...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Multidisciplinary Digital Publishing Institute (MDPI)
2022
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/101224/1/101224_Investigating%20the%20mechanical%20properties.pdf http://irep.iium.edu.my/101224/7/Investigating%20the%20Mechanical%20Properties%20and%20Durability%20of%20Asphalt%20Mixture%20_scopus_new.pdf http://irep.iium.edu.my/101224/8/Investigating%20the%20Mechanical%20Properties%20and%20Durability%20of%20Asphalt%20_wos_new.pdf http://irep.iium.edu.my/101224/ |
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| Summary: | Modifiers such as fibers, fillers, natural and synthetic polymer extenders, oxidants and
anti-oxidants, and anti-stripping agents are added to produce modified asphalt. However, polymers
are the most widely utilized modifiers to enhance the function of asphalt mixtures. The objective
of this research was to evaluate the mechanical properties and durability of epoxidized natural
rubber (ENR)-modified asphalt mix under short- and long-term aging conditions. The physical and
rheological characteristics of the base asphalt and ENR-modified asphalt (ENRMA) were tested. In
order to evaluate the mechanical properties and durability of the modified mixtures, the resilient
modulus of the ENR–asphalt mixtures under unaged, and short- and long-term aging conditions at
various temperatures and frequencies was obtained. Furthermore, the resistance to moisture damage
of asphalt mixtures was investigated. The findings showed that the stiffness of the ENR–asphalt mixes
increased because of the mutual influence of short- and long-term aging on the mixes. In addition,
ENR reduced the susceptibility to moisture damage. The stiffness of the mixes was influenced by the
temperature and frequencies. By using mathematical modelling via the multivariable power least
squares method, it was found that temperature was the dominant factor among all other factors. The
results suggested that the durability of asphalt pavements is improved by using ENR. |
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