TY - JOUR
T1 - The effects of surface treatments on rapid chloride permeability tests
AU - Yoon, Seyoon
AU - Oh, Sang Gyun
AU - Ha, Juyoung
AU - Monteiro, Paulo M.
PY - 2012/8/15
Y1 - 2012/8/15
N2 - Surface treatments are commonly applied to improve the chloride resistance of concrete structures exposed to saline environments. Information on chloride ingress to surface-treated concrete is mostly provided by application of the rapid chloride permeability test (RCPT); this test is short in duration and provides rapid results. This study presents a numerical formulation, based on the extended Nernst-Plank/Poisson (NPP) equation, to model the effect of the surface treatment on a sample tested by RCPT. Predictions of the model are compared to experimental measurements. The simulations show that the results from RCPT, in terms of ionic profiles and measurement of the electric field, are dependent on the effectiveness of surface treatments. During RCPT, highly effective surface treatments cause both cations and anions to flocculate at the interface between the surface treatment and the concrete, creating a local electric field. Our numerical model includes these phenomena and presents a methodology to obtain more accurate diffusivities of the surface-treated- concrete from RCPT.
AB - Surface treatments are commonly applied to improve the chloride resistance of concrete structures exposed to saline environments. Information on chloride ingress to surface-treated concrete is mostly provided by application of the rapid chloride permeability test (RCPT); this test is short in duration and provides rapid results. This study presents a numerical formulation, based on the extended Nernst-Plank/Poisson (NPP) equation, to model the effect of the surface treatment on a sample tested by RCPT. Predictions of the model are compared to experimental measurements. The simulations show that the results from RCPT, in terms of ionic profiles and measurement of the electric field, are dependent on the effectiveness of surface treatments. During RCPT, highly effective surface treatments cause both cations and anions to flocculate at the interface between the surface treatment and the concrete, creating a local electric field. Our numerical model includes these phenomena and presents a methodology to obtain more accurate diffusivities of the surface-treated- concrete from RCPT.
KW - B: Finite element analysis
KW - D: Electrochemical properties
KW - Surface properties
KW - Transport properties
UR - http://www.scopus.com/inward/record.url?scp=84864666180&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2012.05.047
DO - 10.1016/j.matchemphys.2012.05.047
M3 - Article
AN - SCOPUS:84864666180
SN - 0254-0584
VL - 135
SP - 699
EP - 708
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
IS - 2-3
ER -