A micromechanical model for characterization of cement paste at early age validated with experiments

Title: A micromechanical model for characterization of cement paste at early age validated with experiments
Author(s): Guang Ye, Zhi Hui Sun, Thomas Voigt, K. van Breugel, S.P. Shah
Paper category : conference
Book title: International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur
Editor(s): J. Weiss, K. Kovler, J. Marchand, and S. Mindess
Print-ISBN: None
e-ISBN: 2912143926
Publisher: RILEM Publications SARL
Publication year: 2004
Nb references: 15
Language: English

Abstract: The gradual evolution of the material properties of a cement-based material, i.e. the stiffness of cement paste, is the result of the continuous change of the microstructure with the progress of the hydration process. Based on an existing micromechanical model for the simulation of the shear and elastic modulus of cement paste, this paper focuses on the determination of a structure parameter k in the micromechanical model for stiffness proposed by Bergman et al. in 1984 [9]. The dynamic elastic modulus, shear modulus, the degree of hydration and the ultrasonic pulse velocity were determined for cement pastes with water/cement (w/c) ratio 0.50 and 0.60. The structure parameter k was deduced from these measurements. The physical meaning of this parameter was investigated by correlating the experimentally obtained values for the stiffness with microstructural parameters obtained from numerical simulation studies.

Online publication: 2004-03-25
Classification: Transport
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.043