• search hit 2 of 28
Back to Result List

Effect of minimum temperature, salt and moisture content on concrete under freeze-thaw deicing salt attack

  • While in the field of reinforcement corrosion service life prediction is well-established, there is still need for a user-friendly design model in the field of freeze-thaw deicing salt attack. This attack is one of the major causes of damage to concrete structures in cold climates. The degree of moisture during the first freeze-thaw-cycles exceeds moisture saturation by capillary suction and diffusion. When a critical degree of saturation is reached before freezing damage occurs immediately. As a consequence, depending on the concrete resistance (e.g. pore structure of the concrete) and the severeness of the freeze-thaw load (e.g. minimum temperature, moisture offer and salt concentration), a certain number of freeze-thaw cycles is needed before damage occurs (initial phase). The main exposure parameters influencing the initial phase as well as the subsequent evolution of damage (deterioration phase) are the minimum temperature as well as the salt and moisture content. These factors were determined by single-sided NMR, gravimetry and mercury intrusion porosimetry respectively. Three different concrete compositions were exposed to freeze-thaw deicing salt load at different minimum temperatures. To investigate the influence of the initial moisture content concrete specimens were continuously exposed to freeze-thaw load while other specimens from the same batch were exposed to alternating freeze-thaw exposure with intermediate dry periods. It was found that the minimum temperature and intermediate dry periods had a significant influence on the initial phase as well as on the degradation phase. In addition, higher chloride content in the near-surface concrete reduced the scaling rate. The chloride content under freeze-thaw exposure with 3% NaCl solution in laboratory significantly exceeded typical contents due to capillary suction and diffusion. Increasing the minimum temperature increased the chloride content. The investigations form the basis for service life prediction of concrete towards freeze-thaw deicing salt attack.

Export metadata

Additional Services

Share in Twitter Search Google Scholar Statistics
Metadaten
Author:Charlotte ThielORCiD, Dirk Lowke, Christoph GehlenORCiD
DOI:https://doi.org/10.13140/2.1.3243.9367
Parent Title (English):ICDC 2012 : International Congress on Durability of Concrete; Trondheim, Norway, 18-21 June 2012
Publisher:Norwegian Concrete Association
Document Type:conference proceeding (article)
Language:English
Year of first Publication:2012
Release Date:2022/11/25
Tag:freeze-thaw deicing salt attack; moisture movement
Institutes:Fakultät Bauingenieurwesen
Fakultät Bauingenieurwesen / Labor für Baustoffe
Publication:Externe Publikationen
research focus:Gebäude und Infrastruktur
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG
Einverstanden ✔
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.