NDLI: A study on sampling methods for chloride profiles: simulations using data from EPMA

Content Provider	Springer Nature Link
Author	Wall, Henrik Nilsson, Lars Olof
Copyright Year	2007
Abstract	Investigating marine concrete by determining the chloride profile is a common way for making a prediction of the remaining service life of a structure. The most common methods of sampling concrete for this purpose is dust sampling by dry drilling or sampling cores which are analyzed by profile grinding in a laboratory. Now, a similar study has been performed, by simulating different sampling techniques in data from EPMA. The results from the simulations of the concrete specimen analyzed with the EPMA, confirm the results from earlier performed dry drilling tests in laboratory and shows the same extensive variations when chloride content is presented as % by weight of concrete instead of as % by weight of calcium oxide. Comparing the results from the earlier performed sampling by dry drilling with the results from the EPMA simulations, it is seen that the dry drilling probably is afflicted with a systematic error by “movement” of dust into the sampling holes when drilling. This study also shows effects of large aggregates in small bores even though the cement content is referred to. However, no signs of “shadowing” by the aggregates was detected when the simulations where performed. Even “horizontal” drilling was simulated in order to be able to detect this possible effect of the aggregates on the chloride ingress into the concrete.La détermination du profil de concentration en chlorures dans un béton d’une structure soumise à un environnement marin est une démarche usuelle pour une prédiction de la durée de service résiduelle de la structure. Les méthodes d’échantillonnage les plus communes sont le prélèvement de poudre par forage ou le carottage à sec à profondeurs croissantes pour dosages de chlorures en laboratoire. Ici une étude similaire a été réalisée en simulant différentes techniques d’échantillonnage recueillies des données d’EPMA. Les résultats des simulations des échantillons de béton analysés avec l’EPMA confirment ceux obtenus précédemment à partir de prélèvements de poudre par forage. Ils montrent également les mêmes étendues de variations lorsque les teneurs en chlorures sont exprimées en % de masse de béton plutôt qu’en % de masse d’oxyde de calcium. La comparaison des résultats obtenus précédemment par prélèvement de poudre avec ceux des simulations de l’EPMA montre que le prélèvement de poudre est probablement affecté d’une erreur systématique engendrée par « le mouvement » de la poudre dans le forage. Par ailleurs, cette étude montre l’effet des granulats de grande taille dans les forages de taille limitée même si la teneur en ciment est une référence. Cependant, aucun effet des granulats n’a été constaté au cours des simulations. Le forage horizontal a été également simulé afin de pouvoir détecter cet effet possible de granulats sur la pénétration des chlorures dans le béton.
Starting Page	1275
Ending Page	1281
Page Count	7
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	41
Issue Number	7
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-11-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	EPMA Chloride profiling Marine concrete Profile grinding Building Materials Civil Engineering Operating Procedures, Materials Treatment Mechanical Engineering Theoretical and Applied Mechanics Structural Mechanics
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Bit shape geometric considerations when sampling by dry drilling for obtaining chloride profiles in concrete

Chloride penetration into concrete in marine environment-Part II: Prediction of long term chloride penetration

Chloride penetration into concrete in marine environment—Part I: Main parameters affecting chloride penetration

Variation of chloride profiles in homogeneous areas

Application of LA-ICP-MS for meso-scale chloride profiling in concrete

Chloride migration coefficient of self-compacting concrete

Analysis of total chloride content in concrete : Recommendation

Analysis of water soluble chloride content in concrete : Recommendation

Specifying concrete for chloride environments using controlled permeability formwork

A study on sampling methods for chloride profiles: simulations using data from EPMA

Similar Documents

Bit shape geometric considerations when sampling by dry drilling for obtaining chloride profiles in concrete

Chloride penetration into concrete in marine environment-Part II: Prediction of long term chloride penetration

Chloride penetration into concrete in marine environment—Part I: Main parameters affecting chloride penetration

Variation of chloride profiles in homogeneous areas

Application of LA-ICP-MS for meso-scale chloride profiling in concrete

Chloride migration coefficient of self-compacting concrete

Analysis of total chloride content in concrete : Recommendation

Analysis of water soluble chloride content in concrete : Recommendation

Specifying concrete for chloride environments using controlled permeability formwork

A study on sampling methods for chloride profiles: simulations using data from EPMA