Chloride profiling in concrete harbour structures – a study of extensive variations

Henrik Wall, Lars-Olof Nilsson

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

The aim of this work is to try to explain why the chloride profiles differ even though the samples are taken in a homogeneous concrete, and within a small area. As a first step in this study, different sampling methods have been used to investigate the influence of the sampling method on the achieved results.
Slabs were submerged in a 13.5 % NaCl solution for about six months. Two different sampling methods for collecting concrete specimens for chloride profiling were used, collecting dust by dry drilling and by water-cooled drilling of cores. The sampling of concrete dust was performed with a handheld drilling machine with bore diameters of 8, 12 and 20 mm. The sampling of dust was performed with the slab in both horizontal and vertical position with the purpose of detecting influence on results due to sampling position.
The results from this study show that the chloride profiles from the analyzed cores show little scatter, but even that sampling with a 20 mm bore gives quite accurate results compared to the cores and sampling with smaller bores.
Original languageEnglish
Title of host publicationRILEM Proceedings
PublisherRILEM
Number of pages15
Volume51
ISBN (Print)2-351-58003-6
Publication statusPublished - 2006
Event2nd International Symposium on Advances in Concrete through Science and Engineering - Quebec City, Quebec, Canada
Duration: 2006 Sept 112006 Sept 13

Publication series

Name
Volume51

Conference

Conference2nd International Symposium on Advances in Concrete through Science and Engineering
Country/TerritoryCanada
CityQuebec City, Quebec
Period2006/09/112006/09/13

Subject classification (UKÄ)

  • Materials Engineering

Free keywords

  • marine environment
  • chloride profiling
  • harbour structures
  • concrete

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