000			03372nam a2200409 a 4500
005			20260818144346.0
008			240116s2020 th ad rm 000 0 eng d
035			_a.b12416642
099			_aAIT Diss no.TE-19-01
100	0		_aNawapol Brahmajaree
245	1	0	_aInvestigation of the internal structural properties of asphalt mixtures subjected to loading using image analysis
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2020
300			_a100 leaves : _bill.
490	1		_aDissertation ; _vno. TE-19-01
500			_aA dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Transportation Engineering
502			_aThesis (Ph.D.) - Asian Institute of Technology, 2020
520			_aAsphalt concrete is a heterogeneous material consisting of asphalt binder, aggregates, and air voids; spatial distributions and interactions of these components affect the performance of the material past decades, increasing interest has been shown in the use of image analysis techniques for characterizing the internal structure and performance of asphalt mixtures; however, the influence of load applications is still lacking. In this study, a 2-D imaging analysis was used to evaluate the changes in asphalt concrete microstructure due to loading of lab-made specimens and field-core specimens. Uniaxial compression tests were conducted to apply different loading levels to the lab-made specimens, while field-core specimens were subjected to different levels of accumulated traffic load. Results indicate that mixture microstructural properties, including number of aggregate contacts, total contact length, and internal structure index (ISI), significantly decreased with increased strain levels resulting from increased loading levels, whereas average contact orientation and vector magnitude did not change significantly with deformation. Relationships between ISIs and loading levels were plotted and their slopes were determined for all lab-made asphalt mixes. Results suggest that under a given load application, the performance grade of asphalt binder is a critical factor influencing the rutting performance of asphalt mixture.
650		0	_aAsphalt concrete
650		0	_aAsphalt _xMixing
700	0		_aKunnawee Kanitpong, _eChairperson
700	1		_aSantoso, Djoen San, _eExamination Committee
700	0		_aAuckpath Sawangsuriya, _eExamination committee
710	2		_aDepartment of Highways, Thailand, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tDissertation ; _vno. TE-19-01
907			_a.b12416642 _bmulti _cy
902			_a240702
998			_b0 _c240620 _dm _ea _fy _g0
945			_lmnait
945			_lmnait
945			_lmnarc
942			_c40
942			_c20
909			_aBarcode : 30050121038284 _bCREATED : 2024-01-16 _cRECORD # : i13477365 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050121066681 _bCREATED : 2024-05-02 _cRECORD # : i13482373 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050121066376 _bCREATED : 2024-02-19 _cRECORD # : i13485519 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
999			_c64821 _d64821