| Author | Atud, Tebid Joshua |
| Call Number | AIT Thesis no.TE-05-07 |
| Subject(s) | Asphalt emulsion mixtures
|
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TE-05-07 |
| Abstract | In recent years, original asphalt cement AC 60170 has limitations in coping with the excessive
overloading of trucks and the increasingly severe climatic conditions. This has been a
challenge to scientists and pavement engineers, calling for innovative methods to overcome
the limitations of original AC 60170, and thereby improving the performance of asphalt
mixtures. Using asphalt modifiers is one of the favored novelties.
This research focuses on the evaluation of the styrene-butadiene-styrene polymer and hydrated
lime as asphalt modifiers on the performance of asphalt mixtures as measured in terms of
resistance to permanent deformation and moisture damage. The original AC 60170 was used as
the control binder. The performance of asphalt mixtures in terms of rutting and moisture
damage attributes associated with asphalt pavements distresses was evaluated in the
laboratory. The dynamic shear rheometer (DSR) was used to determine the rheological
properties and creep and recovery properties of the studied asphalt binders.
The conventional Marshall Design method was used to produce asphalt specimens for asphalt
mixtures testing. The performance-based properties of asphalt mixtures were evaluated by
using the indirect tensile strength to determine the moisture damage resistance. The immersion
loaded wheel tracking test was used to determine the rutting resistance, and the resilient
modulus test was used to determine the stiffness of asphalt mixtures.
It was found that hydrated lime and polymer modifiers in asphalt binders significantly
improve the rheological properties and creep and recovery properties of asphalt binders.
The results indicate that hydrated lime and polymer modifiers improve the performance-based
properties of asphalt mixtures as measured by the indirect tensile strength test, the loaded
wheel tracking test, and the resilient modulus.
The study establishes that the addition of hydrated lime in asphalt binder by using wet process
is an effective and economical method to improve the performance of asphalt mixture to resist
moisture damage and rutting.
Due to the high cost of polymer modifiers in the market, hydrated lime can be used as an
alternative to enhance the performance of asphalt mixtures. Hydrated lime is readily available,
economical, and easy to use and plays multiple roles in asphalt mixtures.
|
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TE-05-07 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Transportation Engineering (TE) |
| Chairperson(s) | Kunnawee Kanitpong; |
| Examination Committee(s) | Yordphol Tanaboriboon;Shinya Hanaoka; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship;Government of the Republic of Cameroon; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |