Effect of Coarse Aggregate Content on Mechancical Properties of Concrete

• Main Authors: Ping-Hsi Pan, 潘昞熹
• Other Authors: Chien-Hung Lin
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/66074390807735007685

碩士 === 國立中興大學 === 土木工程學系所 === 97 === The purpose of this study is to investigate the effect of coarse aggregate content on mechanical properties of concrete. The parameters included the concrete strength (30 MPa and 40 MPa) and content of coarse aggregate (965 kg/m3, 935 kg/m3, 906 kg/m3, and 877 kg/m3 ). Compressive strength, stress-strain curves, modulus of elasticity, Possion’s ratio, ductility, and splitting tensile strength were investigated. The results show that： 1.Increase of compressive strength and decrease of coarse aggregate content will reduce the ductility the concrete. 2.The moduli of elasticity of concrete were approximately 83 %~90 % of those prediction by ACI 318. 3.The difference in Possion’s ratio between high and low strength concretes becomes apparent, when coarse aggregate content is larger than 906 kg/m3. 4.Increase coarse aggregate content will decrease splitting tensile strength. 5.Equations were proposed to predict strain at maximum stress, stress-strain curve, modulus of elasticity, ductility, and splitting tensile strength related with coarse aggregate content.