1887

Abstract

Summary

Main damage occurring on reinforced concrete (RC) structures can be attributed to the corrosion of the rebar. When dealing with structures in marine environment, chloride ion penetration and water content must be considered, as the different exposure zones (tidal, splash and atmospheric) will have a significant influence.

GPR survey were performed on several piles and processed to evaluate the evolution of the surface permitivity vs. elevation in the tidal and splash areas. For that, a in-house software by HK Polytechnic university was used to estimate the local radar wave velocity for each location of rebar. The objective herein is to estimate if any vertical gradient of water/chloride content in the surface content. GPR results show a notable decrease of water content between the tidal and the atmospheric area, and no significant information on any gradient of chloride content vs. elevation.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201902600
2019-09-08
2024-03-29
Loading full text...

Full text loading...

References

  1. J.P.Broomfield
    , “Corrosion of steel in concrete - Understanding, investigation and repair,” in London: E&FN SPN, 1997.
    [Google Scholar]
  2. G.P.Tilly and J.Jacobs J.
    CONREPNET - Concrete repairs -Performance in service and current practice,” in United Kingdom: IHS BRE Press, 2007.
    [Google Scholar]
  3. WoodwardR, CullingtonDW, DalyAF, VassiePRW, HaardtP, KashnerR
    , Bridge management in Europe (BRIME)-Deliverable D14- Final Report. 2001. p. 228.
    [Google Scholar]
  4. A.Costa and J.Appleton
    , “Chloride penetration into concrete in marine environment - Part I: Main parameters affecting chloride penetration,” Mater Struct.199(32), pp. 252–259.
    [Google Scholar]
  5. , “Chloride penetration into concrete in marine environment - Part II: Prediction of long term chloride penetration,” Mater Struct.1999(32), pp. 354–359.
    [Google Scholar]
  6. V.Bouteiller, L.Bourreau, L.Gaillet, F.Schoefs, B.Thauvin and J.Schneider
    , “Presentation of the French project DéCoF-Ré”, in 40th IABSE symp., 2018, Nantes, France, pp. S14-11–S14-16.
    [Google Scholar]
  7. AFNOR
    AFNOR. NF EN 206-1 / P18-325-1. Béton: spécification, performances, production et conformités. 2004.
    [Google Scholar]
  8. F.C.Sham and W.L.Laï
    , “Development of a new algorithm for accurate estimation of GPR’s wave propagation velocity by common-offset survey method,” NDT&E Int.2016, 83, pp. 104–113.
    [Google Scholar]
  9. X.Dérobert, J.F.Lataste, J.P.Balayssac and S.Laurens
    , “Evaluation of chloride contamination in concrete using electromagnetic nondestructive testing methods,” NDT&E Int.2017, 89, pp.19–29.
    [Google Scholar]
  10. G.Villain, Z.M.Sbartaï, X.Dérobert, V.Garnier, J.P.Balayssac
    , “Durability diagnosis of a concrete structure in tidal zone by combining NDT methods: laboratory tests and case study,” Const. & Build. Mat.2012, 37, pp. 893–903
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201902600
Loading
/content/papers/10.3997/2214-4609.201902600
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error