Abstract

LIZARAZO MARRIAGA, JUAN  and  CLAISSE, PETER. OPTIMIZATION OF THE IONIC TRANSPORT RELATED PROPERTIES OF CONCRETE AND SIMULATION OF THE ASTM C1202 TEST. Dyna rev.fac.nac.minas [online]. 2009, vol.76, n.160, pp.185-194. ISSN 0012-7353.

In this paper the fluxes of the principal ionic species present (Cl, OH, Na, and K) during an ASTM C1202 test “Standard Test Method for Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration” were modelled by a finite differences approach using the Nernst - Plank equation with a variable electrical field. This equation describes the ionic movements in saturated porous materials. To achieve this, a new electrochemical test has been carried out and its results were optimized to obtain the intrinsic diffusion, the hydroxide composition of the pore solution, the porosity, and the chloride capacity of binding

Keywords : Rapid chloride permeability test; chloride; migration; concrete.

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