000			04179ntm a2200337 i 4500
999			_c101236 _d101242
003			MY-KuUP
005			20251125110924.0
006			t||||fr|||| 000 0
007			ta
008			240910t20242024my a|||fr|||| 000 0 eng d
020			_aTHE0009952 (Local) _qHardback
040			_aUMPSA _beng _cUMP _erda
090			_aFTKMA .A43 2024 r Thesis
100	1		_aAmanina Farhana Binti Ahmad, _eauthor.
245	1	0	_aStudy on mechanical performance and temperature profile characteristic of polyethylene terephthalate modified asphalt / _cAmanina Farhana Binti Ahmad
264		1	_aKuantan, Pahang : _bUMPSA , _c2024
264		4	_c© 2024
300			_a30 cm. _billustration ; _30 cm.30 cm. _e1 CD-ROM
336			_2rdacontent _atext
337			_2rdamedia _aunmediated
338			_2rdacarrier _avolume
347			_2rda _atext file _bPDF
500			_aFaculty of Mechanical and Automotive Engineering Technology
502			_aThesis (Doctor of Philosophy) -- Universiti Malaysia Pahang – 2024
504			_aIncludes bibliographical references
520	3		_aMalaysian cities such have been reported to experience a temperature rise of 0.6 ̊C in a decade. In Malaysia, asphalt pavements have the ability to absorb a higher heat flux, resulting in the production of an average of 400 to 600 MJ/m2 of solar radiation per month due to the country's equatorial geographical profile, thereby increasing pavement temperatures. Pavements subjected to such elevated temperatures are susceptible to experiencing rutting. Therefore, a study on the temperature profile of the asphalt pavement layer would be useful in the development of pavement energy harvesting in Malaysia. This study investigated the impact of using polyethylene terephthalate (PET) as an aggregate coating to enhance pavement mixture and its influence on temperature profiles within the pavement. Temperature profiles were collected using thermocouples at each layer of pavement samples over 6-hour periods under a simulated temperature range of 30°C to 70°C, based on actual temperatures recorded for the East Coast of Malaysia. The temperatures were initially recorded at 30°C and then increased by 5°C every 6 hours until reaching a temperature of 70°C. Employing a dry process, the research aimed to determine the optimal percentage of PET content for aggregate coating and its effects on bituminous mixture properties when compared to a conventional mixture. PET was introduced in powdered form, with particle sizes range 0.425mm to 0.075mm, and the Marshall mix design method (ASTM D6927) was utilized. Initially, 15 samples were employed to ascertain the optimal bitumen content (OBC), which was found to be 4.7% by weight of the bituminous mixture. Various PET content at 2%, 4%, 6%, 8%, and 10% by weight of the 4.7% OBC were then tested to determine the optimal modifier content (OMC). The results indicated that the OMC for PET was 6.3%, as it exhibited favorable stability at 23.5 kN, a bulk density of 2.338 g/cm³, 74% bitumen voids filled (VFB), a flow of 3.4 mm, air voids (AV) at 3.8%, and voids in the mineral aggregate (VMA) at 14.4%. The 6.3% PET mixture also demonstrated a 7.1% increase in stability compared to the conventional mixture. Regarding temperature profiles, it was observed that the surface temperature of the modified pavement sample was 2.1°C higher than that of the unmodified asphalt sample. Furthermore, the bottom layer temperature was 3.3°C higher in the modified sample compared to the unmodified sample. The maximum subgrade surface temperature for the modified pavement sample reached nearly 65.9°C, whereas the maximum subgrade temperature at a depth of 35 cm was 28.3°C. In conclusion, PET was proven to be a suitable material for enhancing pavement strength when added in the right proportion as an aggregate coating and also can increase the potential of energy harvesting by study the temperature profile of pavement.
610	2	0	_aFaculty of Mechanical and Automotive Engineering Technology _xDissertations
650		0	_aUniversities and colleges _xDissertations
650		0	_aTheses _xDissertations
942			_2lcc _cTHESIS