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

Wall, Henrik LU and Nilsson, Lars-Olof LU (2006) 2nd International Symposium on Advances in Concrete through Science and Engineering In RILEM Proceedings 51.
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
marine environment, chloride profiling, harbour structures, concrete
in
RILEM Proceedings
volume
51
pages
15 pages
publisher
RILEM
conference name
2nd International Symposium on Advances in Concrete through Science and Engineering
ISBN
2-351-58003-6
language
English
LU publication?
yes
id
d5675eb2-1033-4e1c-9847-8230949dd39c (old id 1030906)
date added to LUP
2008-02-12 19:40:14
date last changed
2016-04-16 07:25:37
@misc{d5675eb2-1033-4e1c-9847-8230949dd39c,
  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. <br/><br>
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.<br/><br>
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.},
  author       = {Wall, Henrik and Nilsson, Lars-Olof},
  isbn         = {2-351-58003-6},
  keyword      = {marine environment,chloride profiling,harbour structures,concrete},
  language     = {eng},
  pages        = {15},
  publisher    = {ARRAY(0x8f5cf20)},
  series       = {RILEM Proceedings},
  title        = {Chloride profiling in concrete harbour structures – a study of extensive variations},
  volume       = {51},
  year         = {2006},
}