Procedure for monitoring PH in porous materials

Abstract

The present invention relates to a method for pH monitoring in porous materials, preferably in reinforced concrete structures. A voltammetric sensor is used comprising a metal electrode whose oxidation/reduction potential has a Nernstian-type response to pH variation, or an electrode of a conductive material whose oxidation/reduction reactions do not overlap with the beginnings of the oxidation and reduction curves of the solvent and the potential at which said curves begin has a Nernstian-type response to pH variation. A potentiodynamic excitation signal is applied to the electrode which produces a response in electric current intensity that is related to the pH in the monitored material. Preferably, the applied potentiodynamic excitation signal is rectangular or triangular in shape.