Chemoporoplasticity of Calcium Leaching in Concrete
- 1 October 1999
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Engineering Mechanics
- Vol. 125 (10), 1200-1211
- https://doi.org/10.1061/(asce)0733-9399(1999)125:10(1200)
Abstract
This paper presents a macroscopic material model for calcium leaching in concrete, for the quantitative assessment, in time and space, of the aging kinetics and load bearing capacity of concrete structures subjected to severe chemical degradation (such as radioactive waste disposal applications). Set within the framework of chemically reactive porous continua, the model accounts explicitly for the leaching of calcium of portlandite crystals and C-S-H, and its cross-effects with the elastic deformation (chemical damage) and irreversible skeleton deformations (chemical softening) treated within the theory of chemoplasticity. In the first part of this paper the governing equations are derived focusing on the chemomechanical couplings between calcium dissolution, increase in porosity, and deformation and (micro-) cracking of concrete. Without any a priori assumption concerning local equilibrium between the solid calcium concentration s and the interstitial calcium concentration c the well-known calcium leachi...Keywords
This publication has 16 references indexed in Scilit:
- Coupled diffusion-damage modelling and the implications on failure due to strain localisationInternational Journal of Solids and Structures, 1998
- Effect of the leaching of calcium hydroxide from cement paste on mechanical and physical propertiesCement and Concrete Research, 1997
- Creep and plasticity due to chemo-mechanical couplingsArchive of Applied Mechanics, 1996
- Leaching of both calcium hydroxide and C-S-H from cement paste: Modeling the mechanical behaviorCement and Concrete Research, 1996
- Pore structure of hardened portland cement pastes and its influence on propertiesAdvanced Cement Based Materials, 1994
- Modelling the leaching of calcium hydroxide from cement paste: effects on pore space percolation and diffusivityMaterials and Structures, 1992
- Modelling of the corrosion of the cement paste by deionized waterCement and Concrete Research, 1992
- Computer simulation of the diffusivity of cement-based materialsJournal of Materials Science, 1992
- Comparison of mechanical properties of compacted calcium hydroxide and portland cement paste systemsCement and Concrete Research, 1983
- A study of mechanical properties of autoclaved calcium silicate systemsCement and Concrete Research, 1975