Current Distribution in Reinforcing Steel Cathodically Protected by Cement Paste Anode

Tuesday, 7 October 2014: 17:35
Expo Center, 1st Floor, Universal 15 (Moon Palace Resort)
C. P. Barrios (Universidad Autonoma de Sinaloa), R. E. Nuñez (Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa (UAS)), J. H. Castorena (Facultad de Ingeniería Mochis, Universidad Autónoma de Sinaloa), M. J. Pellegrini (Centro de Investigación en Materiales Avanzados, Física de Materiales), E. E. Maldonado (Universidad Veracruzana, Facultad de Ingeniería Civil-Xalapa), and J. P. Garcia (Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí)
The present work shows the study of the distribution of current and electrochemical potential in the reinforcing steel by using as anode a layer of cement paste added with graphite powder and carbon fiber. The research was carried out on concrete slabs with w / c ratio of 0.5. Each slab is placed 12 steel rods. One of the slabs was contaminated with Cl- added in the mixing water 5% NaCl by weight. Was applied on each slab a layer thickness of 1cm conductive cement paste. Was measured current draw of each rod as well as the polarized potential. The use of a cement material conductive paste shows a good performance as anode in the PCCI reinforcing steel to achieve maintain polarized potential of-800mV.