A model for reactive porous transport during re-wetting of hardened concrete
TLDR
In this article, a mathematical model is developed that captures the transport of liquid water in hardened concrete, as well as the chemical reactions that occur between the imbibed water and the residual calcium-silicate compounds residing in the porous concrete matrix.Abstract:
A mathematical model is developed that captures the transport of liquid water in hardened concrete, as well as the chemical reactions that occur between the imbibed water and the residual calcium-silicate compounds residing in the porous concrete matrix. The main hypothesis in this model is that the reaction product—calcium-silicate hydrate gel—clogs the pores within the concrete, thereby hindering water transport. Numerical simulations are employed to determine the sensitivity of the model solution to changes in various physical parameters, and compare to experimental results available in the literature.read more
Citations
More filters
Journal ArticleDOI
Physical evidence of swelling as the cause of anomalous capillary water uptake by cementitious materials
TL;DR: In this paper, the authors used strain gauges attached to mortar and concrete samples to measure their deformations during capillary water uptake and found that they show a non-linear evolution with the square root of time.
Journal ArticleDOI
Mathematical modeling and numerical study of carbonation in porous concrete materials
TL;DR: A mathematical model of carbonation process in porous concrete materials is proposed and an uncoupled finite volume method is proposed to solve the nonlinear parabolic system.
Journal ArticleDOI
Water sensitivity of cement-based materials
Journal ArticleDOI
Mathematical modelling of experimental data for crystallization inhibitors
Maria Paola Bracciale,Gabriella Bretti,Alessandra Broggi,Maurizio Ceseri,Assunta Marrocchi,Roberto Natalini,C. Russo +6 more
TL;DR: In this article, a mathematical model describing the effect of phosphocitrate (PC) on sodium sulphate crystallization inside bricks has been proposed, which describes salt and water transport, and crystal formation in a one dimensional symmetry.
Journal ArticleDOI
Reactive transport modelling of a high-pH infiltration test in concrete
M. Carme Chaparro,M. Carme Chaparro,Josep M. Soler,Maarten W. Saaltink,Maarten W. Saaltink,Urs Mäder +5 more
TL;DR: In this article, a double porosity conceptual model is proposed to characterize the transport properties of concrete from the Radioactive waste Disposal Facility at El Cabril (Spain) in order to obtain a decrease of permeability by a factor of 1000.
References
More filters
Book
The chemistry of cement and concrete
TL;DR: The chemistry of cement and concrete as discussed by the authors, The chemistry of concrete and its properties, and the relationship between concrete and cement, is a classic example of such an approach. But it is not suitable for outdoor use.
Book
Environmental soil physics
TL;DR: In this article, the authors present a basic relationship between water and soil properties, including the properties of water in relation to porous media, properties of soil structure and aggregation, and the potential of Soil Water.
Book
Dynamics of fluids in porous media
TL;DR: In this article, the authors present the definitive work on the subject by one of the world's foremost hydrologists, designed primarily for advanced undergraduate and graduate students of ground water hydrology, soil mechanics, soil physics, drainage and irrigation engineering and sanitary, petroleum and chemical engineering.
Journal ArticleDOI
Composition and density of nanoscale calcium–silicate–hydrate in cement
TL;DR: This study measures the composition and solid density of the principal binding reaction product of cement hydration, calcium-silicate-hydrate (C-S-H) gel, one of the most complex of all gels, and quantifies a nanoscale calcium hydroxide phase that coexists with C- S-H gel.
Journal ArticleDOI
A model for two types of calcium silicate hydrate in the microstructure of Portland cement pastes
TL;DR: In this article, a new physical basis for a previously published model for the structure of calcium silicate hydrate (C-S-H) as measured by nitrogen sorption is described.