Ageing and durability of concrete in lab and in field conditions: investigation of chloride penetration
| Autor: | Véronique Baroghel-Bouny, Anthony Soive, Mickael Saillio, X. Wang, B. Thauvin, Mickaël Thiery, M. Dierkens |
|---|---|
| Přispěvatelé: | Formulation, Microstructure, Modélisation et Durabilité des Matériaux de Construction (IFSTTAR/MAST/FM2D), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Communauté Université Paris-Est, Centre d'études techniques de l'équipement de Lyon (CETE de Lyon), Avant création Cerema, Département Matériaux (IFSTTAR/MAT), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Paris-Est, Centre d'études techniques de l'équipement Ouest (CETE Ouest), Bouygues Travaux Publics, parent |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
BETON HAUTES PERFORMANCES Silica fume ISOTHERME 0211 other engineering and technologies 02 engineering and technology Chloride [SPI.MAT]Engineering Sciences [physics]/Materials 021105 building & construction medicine Geotechnical engineering Waste Management and Disposal Chloride penetration Metallurgy DURABILITE [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Durability Tidal zone Fly ash Ceramics and Composites CHLORURE Cementitious 0210 nano-technology medicine.drug Field conditions |
| Zdroj: | Journal of Sustainable Cement-Based Materials Journal of Sustainable Cement-Based Materials, Taylor & Francis, 2013, 2 (2), pp 67-110. ⟨10.1080/21650373.2013.797938⟩ |
| ISSN: | 2165-0373 2165-0381 |
| DOI: | 10.1080/21650373.2013.797938⟩ |
| Popis: | Long-term studies under various natural exposure conditions are still needed in order to understand and quantify ageing and durability of concrete structures, in particular in the case of mixtures which incorporate supplementary cementitious materials (e.g. fly ash). With this purpose, a large-scale and long-term experimental program was initiated a lot of years ago by the LPC network within the framework of the French national project 'BHP 2000'. From then, further researches have been carried out in order to complement the program. The present paper focuses on chloride penetration in concrete samples in lab conditions and in reinforced concrete (RC) structural elements exposed for 10years to two different natural environments (tidal zone in marine environment, as well as road and cold environment). Numerous mixtures (28day cylinder compressive strengths ranging from 20 to 130MPa) were studied in these various conditions, e.g. high-performance materials with or without silica fume (SF), as well as normal-strength fly-ash (FA) concretes. Carbonation and chloride penetration depths, along with total chloride concentration and degree of saturation profiles, have been measured on the RC structural elements and analyzed as a function of the exposure conditions and of the mix-parameters. In addition, the chloride data have been compared to lab results. Apparent chloride diffusion coefficients, as well as chloride binding isotherms and capacities, have also been assessed on these structural elements and compared to lab results. Good consistence between results in field and in lab conditions has been highlighted, except when carbonation has affected the field results. In addition, the good performance of SF-HPCs and mature FA concretes has been pointed out in the tested outdoor conditions, as well as that of the mature ground granulated blast furnace slag concretes tested in lab. |
| Databáze: | OpenAIRE |
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