Chloride profiling in concrete harbour structures – a study of extensive variations
Author
Summary, in English
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.
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.
Department/s
Publishing year
2006
Language
English
Publication/Series
RILEM Proceedings
Volume
51
Document type
Conference paper
Publisher
RILEM
Topic
- Materials Engineering
Keywords
- marine environment
- chloride profiling
- harbour structures
- concrete
Conference name
2nd International Symposium on Advances in Concrete through Science and Engineering
Conference date
2006-09-11 - 2006-09-13
Conference place
Quebec City, Quebec, Canada
Status
Published
ISBN/ISSN/Other
- ISBN: 2-351-58003-6