Correlation of the resistance of HMA to moisture damage measured by using ultrasonic test and performance related test | |
| Author | Kamal, Md. Abu Hena Mostafa |
| Call Number | AIT Thesis no.TE-05-02 |
| Subject(s) | Pavements, Asphalt concrete Asphalt concrete |
| 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-05-02 |
| Abstract | A rational and practical test procedure for simulating moisture damage in the laboratory is needed for many years in evaluating asphalt paving mixes quickly and efficiently prior to the construction of flexible pavement. This need is extended by the currently used modified Lottman procedure, AASHTO T283, which, although based on sound principles and in use for many decades, is often cited as producing inconsistent results and does not simulate the repeated generation of pore pressure under load. Therefore, there is a need for the development of a rational procedure for evaluation of moisture susceptibility of asphalt paving mixes. In this study a test method ultrasonic moisture accelerated conditioning (UMAC) process is evaluated to measure the performance of HMA mixes and attempted to correlate it with other performance related tests such as the indirect tensile strength (ITS), the resilient modulus (MR) and the rutting tests to prove the reliability of this test. In the UMAC process, samples of hot mix asphalt (HMA) mixes are conditioned at 60°C in water and agitated by ultrasonic energy for a specified period of time. The repeated cycle of compression and cavitations accelerates the detachment and displacement of the asphalt binder from the aggregate's surface. The proportion of separated particles versus conditioning time is statistically shown to have a unique linear relationship for each mix. The slope of linear regression function represents the rate at which the small particles are released as the asphalt recedes along the surface of the aggregate. Repeatability of this test is confirmed statistically by replicate samples of each mix. Six mixes prepared after following Marshall Mix design method are subjected to the UMAC test and other performance related tests. The combination of Limestone aggregate and Polymer Modified Asphalt is the best while the combination of Andesite aggregate and AC60/70 is the worst mixture among all mixes evaluated by all tests. The tensile strength ratio (TSR) and the conditioned tensile strength of ITS test, the resilient modulus ratio (RMR) of MR test, and the permanent deformation rate and the stripping inflection point (SIP) of rutting test are correlated with the average UMAC slope for all corresponding mixes and found that UMAC test has significant relationships with resilient modulus test and rutting test. An inconsistence relationship is found between the UMAC test and the ITS test. The UMAC procedure can be used as simple & quick test method with good repeatability for the evaluation of moisture sensitivity of an HMA mixture. As research continues, testing procedures and evaluation parameters of the UMAC test may be developed |
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TE-05-02 |
| 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) | AIT Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |