000			03815nam a2200421 4500
005			20260817162526.0
008			200798 th eng
035			_a.b1008342x
099		9	_aAIT Thesis no. ST-93-16
100	0		_aAsnee Pochanart
245	1	0	_aAnalytical estimation of static characteristics of asphalt layer reinforced by polymer grid
260			_aBangkok : _bAsian Institute of Technology, _c1993
300			_a68 leaves
490	1		_aThesis ; _vno. ST-93-16
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1993
520			_aOne of the problems with highway bridges is the expansion joints. The conventional expansion joints cannot provide a smooth surface as a result there is driving discomfort, pavement damage, bridge vibration, etc. A new type of expansion joint on which a continuous surface pavement can be laid was proposed. New expansion joints, which are polypropylene grid reinforced asphalt blocks, were experimentally investigated. As the mechanical properties of asphaltic concrete are temperature dependent, it sis difficult and troublesome to conduct the laboratory tests. Consequently, the experimental results are largely scattered. In this thesis, an attempt is made to minimize the need to conduct laboratory tests. The components are studied using the finite element method and a model is proposed and analyzed. With the use of laboratory test results from Japan, the parameters involved in the model are estimated. Then the bending characteristics of the polypropylene grid reinforced asphalt block is investigated. Stress-strain curves and load-deflection curves are estimated for the reinforced asphalt blocks at various temperatures. An analysis concerned with a construction technique in which the prefabricated reinforced asphalt block is used is also conducted. The results from the analysis show that the static characteristics of polypropylene grid reinforced asphalt blocks are well simulated using the finite element method in which plastic material with the Drucker-Prager yield criterion is used to constitute the asphalt element model. It is also revealed that in order to improve the bending resistance of the asphalt block, it is most effective to put the reinforcement close to the tension surface. Furthermore, an appropriate setting up method of prefabricated reinforced asphalt block at the joint portion of the bridge is found
650		0	_aGrillages (Structural engineering)
650		0	_aAsphalt cement
700	1		_aSugiyama, Toshiyuki, _eChairperson
700	0		_aPichai Nimityongskul, _eExamination Committee
700	1		_aKarasudhi, Pisidhi, _eExamination Committee
710	2		_aGovernment of Switzerland, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. ST-93-16
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B16379
907			_a.b1008342x _bmnait _cs
902			_a240410
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909			_aBarcode : 30050003066213 _bCREATED : 1995-10-13 _cRECORD # : i10086146 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050003066221 _bCREATED : 1995-10-13 _cRECORD # : i10086158 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050160023676 _bCREATED : 2016-03-30 _cRECORD # : i12913595 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
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