Chapter2 Main Physical and Mechanical Properties of Concrete and Reinforcing Steel
Chapter2 Main Physical and Mechanical Properties of Concrete and Reinforcing Steel
2.1 Properties of hardened concrete The mechanical properties of hardened concrete Short term properties Long term properties Strength in compression, √Creep,:Shrinkage tension and shear Stiffness measured by modulus of elasticity The compressive strength of concrete is the most common measure for judging the quality of concrete
2.1 Properties of hardened concrete The mechanical properties of hardened concrete Short term properties Long term properties üStrength in compression, tension and shear üStiffness measured by modulus of elasticity üCreep; Shrinkage The compressive strength of concrete is the most common measure for judging the quality of concrete
2.1.1 Uniaxial compressive strength and Stress-strain curve in compression Failure mechanism of plain concrete under compression
2.1.1 Uniaxial compressive strength and Stress-strain curve in compression
Flaws in concrete 要想弄清楚Failure mechanism,首先必须了解混凝土中的Flaws
Flaws in concrete
Flaws in concrete Flaws are attributable to a number of causes. the main ones being: >Discontinuities in the cement paste(水泥胶体) owing to its complex morphology(形态) >Voids caused by shrinkage(徐变)，thermal movements and incomplete compaction(搅拌) Discontinuities at the boundary between aggregate(骨料)particles and the paste or nortar(砂浆)
Flaws are attributable to a number of causes, the main ones being: Ø Discontinuities in the cement paste （水泥胶体） owing to its complex morphology（形态） Ø Voids caused by shrinkage（徐变） ， thermal movements and incomplete compaction (搅拌） Ø Discontinuities at the boundary between aggregate （骨料）particles and the paste or mortar （砂浆）