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研究生:莊福昌
研究生(外文):Fu-Chang Chung
論文名稱:高性能混凝土粗骨材特性之探討
論文名稱(外文):Study on Characteristics of Coarse Aggregate in High Performance Concrete
指導教授:張大鵬
指導教授(外文):Ta-Peng Chang
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:營建工程技術學系
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:1995
畢業學年度:83
語文別:中文
論文頁數:215
中文關鍵詞:高性能混凝土 粗骨材 最小孔隙比法
外文關鍵詞:High Performance Concrete Coarse Aggregate least-void ratio method
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本研究利用最小孔隙比法為基碄製高性能混凝土,探討四種不同性質粗骨
材對混凝土各齡強度發展之影響,在同配比下,不同粗骨材及不同級配與
粒徑變化下,與混凝土單軸抗壓強度之關係。不同粗骨材之基本特性對混
凝土之應力-應變、彈性模數、抗彎強度、劈裂強度之影響。並透過SEM
了解不同粗骨材和漿體之鍵結情形及表面狀況。研究結果顯示, A、B、C
、D四種骨材強度為93.55MPa、71.86MPa、69.96MPa、42.37MPa,劈裂強
度為3.72MPa、3.36MPa、2.72Mpa、2.21MPa,靜彈性模數為 15.96GPa
∼23.55GPa。不同粗骨材單一粒徑下,粗骨材強度較強者,不一定有較高
混凝土抗壓強度。相同骨材但不同級配下,對混凝土靜彈性模數影響不大
。粗骨材質較佳者,內部組織緻密具有較佳之工作度,及較快的波速。
This study bases on the proportional method of th least-void
ratio concept to mix the high-performance concrete. The effects
of coarse aggregate properties from four defferent kinds on the
strengths of concrete at various ages are investigated. Under
same proportion, the relations between different aggregates,
aggregate gradings, aggregate sizes and uniaxial compressive
strength of concrete specimens are presented. The influence of
the basic characteristics for different aggregates on the
stress-strain curve, elastic modulus, flexural strength and
splitting tensile strength of concrete specimens are discussed.
The bonding state between mortar and different aggregates, and
the surface condition of aggregates are also examined by SEM.
Experimental results indicate that the compressive strengths of
types A, B, C, and D aggregates are 93.55, 71.68, 69.96 and
42.37 Mpa respectively; the splitting tensile strengths are
3.72, 3.36, 2.72 and 2.21 Mpa respectively; the elastic moduli
are in the range of 15.96 to 23.55 GPa respectively. Under the
condition of same aggregate but having uniform aggregate sizes,
aggregates with the higher strength do not mecessarily have a
higher compressive strength of the corresponding concrete
specimens. Same aggregates but with different grading have
little effects on the elastic modulus of concrete. Aggregates
with better engineering properties always have denser interior
constitution, better workability and higher pulse speed of
sound.
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