000			03281nas|a2200445 i 4500
005			20260817162920.0
008			010713s2001 th uzm rtt 00| a1eng d
035			_a.b11829448
099		9	_aAIT Thesis no. ST-01-03
100	0		_aJirapong Wachirathamrojn
245	1	3	_aAn application of microwave curing technique to predict the 28-day compressive strength of normal concrete containing Mae-Moh fly ash
260			_aBangkok : _bAsian Institute of Technology, _c2001
300			_a108 leaves
490	1		_aThesis ; _vno. ST-01-03
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2001
520			_aThe accelerated strength of concrete cured with microwave energy is measured to estimate the 28-day compressive strength of normal concrete containing fly ash. The optimal microwave curing process involving heating duration, power, delay time, early age test time and later age test time, is determined first and then is employed to establish the 28-day strength estimation equation. Test parameters include the amount of fly ash replacement, namely 0%, 10%, 20% and 30% by weight of cement and mix proportions. The n01mal concrete mix proportions are designed according to the ACI mix design by using OPC Type I, Mae-Moh fly ash, river sand and limestone. The compressive strengths of 3"x6" specimens with various fly ash replacements and mix proportions are tested at the possible early age at 6.5 hours for microwave-cured specimens and at 28 days for normally cured specimens. A simple equation involving only 6.5-hour strength and percent of fly ash replacement can then be established for 28-day strength estimation. Based on the established equation, the estimation yields the average and maximum percentage of error at 5 and ±12.
650		0	_aConcrete _xCuring
650		0	_aStrength of materials
650		0	_aConcrete _xAdditives
700	0		_aPichai Nimityongskul, _eChairperson
700	0		_aThanakorn Pheeraphan, _eCo-Chairperson
700	1		_aNii, Kazuyoshi, _eExamination Committee
700	1		_aTakewaka, Koji, _eExamination Committee
710	2		_aRoyal Thai Government I Human Resource Development Program (Phase II), _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. ST-01-03
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B09441
907			_a.b11829448 _bmnait _cu
902			_a240405
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