A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Shrinkage eigenstresses and hardening of concrete
This paper presents a tensile strength theory for HCP and concrete, based on the chemical shrinkage volume of cement. The final volume shrinkage of cement lies between 50 to 80 cm3/kg and is influenced by many factors. An extrapolation method of shrinkage test data has been presented to determine ultimate chemical shrinkage. Tensile strength is defined as the specific strain work of chemical eigenstresses between reacting particles. This bond energy has been described by means of Lame's constant and the volume shrinkage of HCP. The strength reducing influence of porosity has been considered by a Hasselman model applied to HCP. Based on the assumption that Lame's constant does not change during hydration, the longitudinal ultrasonic velocity has been used to determine the declining Poisson's ratio and the stiffness of hardening HCP. Strengthening and stiffening of HCP and concrete can be recorded simultaneously by buoyancy weighing and TOF measurements.
Shrinkage eigenstresses and hardening of concrete
This paper presents a tensile strength theory for HCP and concrete, based on the chemical shrinkage volume of cement. The final volume shrinkage of cement lies between 50 to 80 cm3/kg and is influenced by many factors. An extrapolation method of shrinkage test data has been presented to determine ultimate chemical shrinkage. Tensile strength is defined as the specific strain work of chemical eigenstresses between reacting particles. This bond energy has been described by means of Lame's constant and the volume shrinkage of HCP. The strength reducing influence of porosity has been considered by a Hasselman model applied to HCP. Based on the assumption that Lame's constant does not change during hydration, the longitudinal ultrasonic velocity has been used to determine the declining Poisson's ratio and the stiffness of hardening HCP. Strengthening and stiffening of HCP and concrete can be recorded simultaneously by buoyancy weighing and TOF measurements.
Shrinkage eigenstresses and hardening of concrete
Schrumpf-Eigenspannungen und Aushärten von Beton
Paulini, P. (author)
2010
9 Seiten, 10 Bilder, 1 Tabelle, 14 Quellen
Conference paper
English
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