000 03445nam a2200409 4500
005 20260818094845.0
008 060898 th eng
035 _a.b10226412
099 9 _aAIT Thesis no. ST-80-17
100 0 _aNoorajan
245 1 0 _aEffect of aggregate properties on strength of gap-graded concrete
260 _aBangkok :
_bAsian Institute of Technology,
_c1980
300 _aiv, 53 p.
490 1 _aThesis ;
_vno. ST-80-17
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, 1980
520 _aFour types of coarse aggregate locally available in Thailand were tested for their physical and mechanical properties. Tests were made with different types and sizes of coarse aggregate to study the effect of aggregate properties on strength and workability of gap- graded concrete. Test results showed that the workability of fresh gap-graded concrete was considerably affected by the types and size distribution of aggregate. Among the four types of aggregate tested, sandstone produced concrete with the least workability whereas gravel gave the most workable concrete without segregation. Increasing the size of aggregate, both coarse and fine, led to a more workable concrete. gate. Test results indicated that the mechanical properties of gap-graded concrete were considerably affected by the properties of coarse aggregate used therein. Gap-graded concrete made with sandstone aggregate gave the highest strength and exhibited, in spite of the highest strength, lowest modulus of elasticity. This phenomenon is mainly caused by the absorption capacity, compressibility and bond strength between matrix and surface of coarse aggregate The modulus of elasticity of gap-graded concrete was directly related to the modulus of elasticity of gap- graded concrete. The design method suggested by LI and RAMAKRISHNAN (1) can be used to produce an optimum mix proportion for all tested crushed aggregates. However, for natural aggregates like gravel this design method has to be modified in order that an optimum proportion is attained.
650 0 _aAggregates (Building materials)
_xTesting
700 0 _aPichai Nimityongskul,
_eChairperson
700 1 _aYamamoto, Yasuhiko,
_eExamination Committee
700 1 _aKawaguchi, Masahiro,
_eExamination Committee
710 2 _aCanadian Government,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. ST-80-17
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B22131
907 _a.b10226412
_bmnait
_cs
902 _a250521
998 _b2
_c951012
_dm
_ea
_fs
_g0
945 _lmnait
945 _lmnait
945 _lmnarc
942 _c20
942 _c40
909 _aBarcode : 30050003079471
_bCREATED : 1995-10-14
_cRECORD # : i10275101
_dLPATRON : 0
_eLCHKIN : -
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 0
_jTOT RENEW : 0
909 _aBarcode : 30050003461828
_bCREATED : 1995-10-14
_cRECORD # : i10275113
_dLPATRON : 1026599
_eLCHKIN : 2016-08-28
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 1
_jTOT RENEW : 0
909 _aBarcode : 30050160013834
_bCREATED : 2016-04-04
_cRECORD # : i1292233x
_dLPATRON : 0
_eLCHKIN : -
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 0
_jTOT RENEW : 0
999 _c34122
_d34122