Research on the Mechanical Properties of Low cement High- Performance Concrete

• Main Authors: Jeng, CHyuan-Jyh, 鄭全志
• Other Authors: Go Cheer Germ
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/02320127150040416172

碩士 === 國立中興大學 === 土木工程學系 === 85 === This study presents the mechanical properties of low cement high-performance concrete(LcHPC). Discussions focus on compressive strengthgain with time, stress-strain behavior in uniaxial compression, modulusof elasticity, and Poisson''s ratio. The test results show that by incorporating low quantity of cementand high volumes of mineral admixtures and coarse aggregates(0.45m^3/m^3),LcHPC can decrease heat of hydration and thermal microcracking, and increasecompressive strength and modulus of elasticity at later ages. Also, the compressive strength can reach over 75MPa. LcHPC improve the disadvantage of common high-performance concrete with high cement contents. As regarding modulus of elasticity, it was observed that the existing empirical formulas of some codes overestimated the modulus of elasticityfor domestic HPC. In this study, the predicated expression obtained byregressing the experimental data estimated elastic modulus, and then compared with other test results of HPC, it was found the predicted valuesgot a reasonable approximation.