Materiales de Construcción, Vol 62, No 306 (2012)

Estimating the chloride transport in cement paste


https://doi.org/10.3989/mc.2012.02011

A. Princigallo
CTG. Italcementi Group. Bergamo, Italy

Abstract


A method was developed to measure the diffusion coefficient of chloride ions in cement paste based on an analytical solution to Fick’s 2nd law in a cylindrical coordinate system. This natural method yielded diffusivity results within as little as a month. Testing time was reduced by exploiting the three-dimensional inward flux in the specimen. In an attempt to determine the saturation concentration, dense portland cement pastes were exposed to a concentrated chloride solution. The method proved to be useful for exploring cement hydration-induced changes in the diffusion coefficient of cement paste.

Keywords


Diffusion; transport properties; cement paste; chloride; modelling

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