Accelerated carbonation of ordinary Portland cement paste and its effects on microstructure and transport properties

Accelerated carbonation of ordinary Portland cement paste and its effects on microstructure and transport properties

Romero Rodriguez, Claudia (Delft University of Technology, the netherlands)
Ye, Rui (Delft University of Technology, the Netherlands - Politecnico di Torino, Italy)
Varveri, Aikaterini (Delft University of Technology, the Netherlands)
Rossi, Emanuele (Delft University of Technology, the Netherlands)
Anglani, Giovanni (Politecnico di Torino, Italy)
Antonaci, Paola (Politecnico di Torino, Italy)
Schlangen, Erik (Delft University of Technology, the Netherlands)
Šavija, Branko (Delft University of Technology, the Netherlands)

2021-04-29

Coupling of carbonation and chlorides ingress mechanisms is very common in concrete under certain exposure conditions such as coastal environments. The aggravation/ mitigation of corrosion by the existence of carbonation lies on the fact that microstructural changes due to carbonation result in changes on the transport properties of the material. In this study we investigate and quantify evolving transport properties of ordinary Portland cement paste, such as porosity, tortuosity and intrinsic permeability. Dual X-ray micro computed tomography (micro CT) is used for the quantification of porosity. Furthermore Dynamic Vapour Sorption (DVS) measurements are carried out to resolve water retention and relative permeability curves. The authors expect to provide insights into the mechanisms of accelerated carbonation in both types of cement paste, as well as data for input and validation of numerical and analytical models on this degradation phenomenon.

blended cement
transport properties cement
dual X-ray microcomputer tomography
DVS
carbonation

http://resolver.tudelft.nl/uuid:e25e3109-c1f1-4757-a7da-c436f2d10878

Conference proceedings

conference paper

(c) 2021 the authors