3D computational simulation of calcium leaching in cement matrices

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URI: https://hdl.handle.net/11556/3939
ISSN: 0465-2746
DOI: 10.3989/mc.2014.08813
Publication date
2014-10-01
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Abstract
Calcium leaching is a degradation process consisting in progressive dissolution of the cement paste by migration of calcium atoms to the aggressive solution. It is therefore, a complex phenomenon involving several phases and dissolution and diffusion processes simultaneously. Along this work, a new computational scheme for the simulation of the degradation process in three dimensions was developed and tested. The toolkit was used to simulate accelerated calcium leaching by a 6M ammonium nitrate solution in cement matrices. The obtained outputs were the three dimensional representation of the matrix and the physicochemical properties of individual phases as a consequence of the degradation process. This not only makes it possible to study the evolution of such properties as a function of time but also as a function of the position within the matrix. The obtained results are in good agreement with experimental values of the elastic modulus in degraded and undegraded samples.
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Publisher Copyright: Copyright © 2014 CSIC.
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Cement paste , Durability , Microstructure , Modelization , Transport properties , Building and Construction , General Materials Science , Mechanics of Materials
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journal article
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Gaitero , J J , Dolado , J S , Neuen , C , Heber , F & Koenders , E A B 2014 , ' 3D computational simulation of calcium leaching in cement matrices ' , Materiales de Construccion , vol. 64 , no. 316 . https://doi.org/10.3989/mc.2014.08813