Application of Digital-Image-Based Models to Microstructure, Transport Properties, and Degradation of Cement-Based materials

1996 ◽  
pp. 167-185 ◽  
Author(s):  
Dale P. Bentz ◽  
Edward J. Garboczi ◽  
Nicos S. Martys
Keyword(s):  
Transport Properties ◽  
Digital Image ◽  
Cement Based Materials

Cementitious Sealing Material: 3D Digital Image Based Characterization of Pore Size Distribution and Modeling of Transport Properties

2013 ◽  
Author(s):  
Neven Ukrainczyk ◽  
Eduardus A. B. Koenders ◽  
Klaas van Breugel
Keyword(s):  
Pore Size ◽  
Transport Properties ◽  
Digital Image ◽  
Oil And Gas ◽  
Transport Model ◽  
Medial Axis ◽  
Three Dimensional ◽  
Cementitious Materials ◽  
Pore Size Distributions

Exhausted oil and gas reservoirs are one of the most potential storage facilities to sequestrate the worlds CO2. These reservoirs are sealed with cementitious materials, that should have a long time performance. Therefore, this paper emphasizes the characterization of the evolving capillary pore network and transport properties of the cementitious microstructure used to seal the wellbore. The Hymostruc numerical model is employed to simulate the development of an evolving virtual microstructure of cementitious materials. The simulated 3D microstructures were then digitized to form a matrix of cubic voxels. The pore-size distributions of the obtained virtual microstructures were calculated using a combination of three-dimensional digital image processing algorithms: 1) distance transform and 2) medial axis thinning algorithm to obtain a 3D skeleton of the pore structure. Transport properties of the simulated microstructures are analyzed employing a finite difference 3D transport model. The modeling results are compared with available literature results.

Multi-Scale Digital-Image-Based Modelling of Cement-Based Materials

1994 ◽  
Vol 370 ◽  
Author(s):  
D.P. Bentz ◽  
E.J. Garboczi ◽  
H.M. Jennings ◽  
D.A. Quenard
Keyword(s):  
Digital Image ◽  
Computer Modelling ◽  
Drying Shrinkage ◽  
Structural Level ◽  
Multi Scale ◽  
Hydrated Cement Paste ◽  
Cement Based Materials ◽  
Saturated Concrete ◽  
And Performance ◽  
Ionic Diffusivity

AbstractComputer modelling of the properties and performance of cement-based materials is complicated by the large range of relevant size scales. Processes occurring in the nanometersized pores ultimately affect the performance of these materials at the structural level of meters and larger. One approach to alleviating this complication is the development of a suite of models, consisting of individual digital-image-based structural models for the calcium silicate hydrate gel at the nanometer level, the hydrated cement paste at the micrometer level, and a mortar or concrete at the millimeter level. Computations performed at one level provide input properties to be used in simulations of performance at the next higher level. This methodology is demonstrated for the property of ionic diffusivity in saturated concrete. The more complicated problem of drying shrinkage is also addressed.

scholarly journals Impact of carbonation on unsaturated water transport properties of cement-based materials

2015 ◽  
Vol 74 ◽  
pp. 44-58 ◽  
Author(s):  
Martin Auroy ◽  
Stéphane Poyet ◽  
Patrick Le Bescop ◽  
Jean-Michel Torrenti ◽  
Thibault Charpentier ◽  
...  
Keyword(s):  
Transport Properties ◽  
Water Transport ◽  
Cement Based Materials ◽  
Water Transport Properties
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