超音波による凝結初期におけるセメントペーストおよびモルタルの物性変化の測定

概要

論文の詳細を見る
This paper describes the analytical results of the physical properties of cement paste and mortar aged at 20±2℃ up to 3 hours or 24 hours. The ultrasonic method was applied to investigate the longitudinal and the transverse pulse propagation properties. The dynamic modulus of elasticity, the dynamic modulus of viscosity and the relaxation time of cement paste and mortar were calculated from the pulse velocity, the frequency and the attenuation constant, respectively, and they were found to be frequency dependent in this time period. The dynamic modulus of elasticity of cement paste changed from 10^7 to 10^9dyn/cm^2 depending upon the water cement ratio and the elapsed time, and the dynamic modulus of viscosity from 10 to 10^5・dyn・sec/cm^2, until the age of 3 hours. The dynamic shear modulus and the dynamic bulk modulus were calculated by the longitudinal and the transverse pulse velocities and the density of specimens. It is found that the visco-elastic analysis is a meaning method to predict the development of these properties for the cement paste and mortar.
社団法人日本材料学会の論文
1983-02-15