0
  • DE
  • EN
  • FR
  • Base de données et galerie internationale d'ouvrages d'art et du génie civil

Publicité

In-Situ and Laboratory Investigation on Leaching and Effects of Early Curing of Shotcrete

Auteur(s): (Tech. Licentiate, PhD student KTH Royal Institute of Technology Division of Concrete Structures Brinellvägen 23, 100 44 Stockholm)
(Ph.D., Professor KTH Royal Institute of Technology Division of Concrete Structures Brinellvägen 23, 100 44 Stockholm)
Médium: article de revue
Langue(s): anglais
Publié dans: Nordic Concrete Research, , n. 2, v. 61
Page(s): 23-37
DOI: 10.2478/ncr-2019-0014
Abstrait:

During the construction of a rock tunnel in Stockholm, several sections with leaching shotcrete (sprayed concrete) were found one year after the spraying was completed. An investigation was therefore conducted, and its results are presented in this paper. The amount of leaching after such a short time indicated that a one-sided water pressure existed in combination with a permeable shotcrete. The reason for the water pressure was likely a partly unsuccessful grouting that created sections with leaking water. The permeable shotcrete could be a combined result of insufficient curing and the use of accelerators, and the effect of in-situ curing was therefore investigated. A total of six slabs were sprayed and cured under different conditions in the tunnel. Test results according to standards indicated that curing has no significant effect on the development of mechanical strength or water penetration through the shotcrete. However, this is believed to be a result of the test method rather than the non-existing effect of curing. Lastly, some modifications to the test standard were proposed for future studies of in-situ curing.

Structurae ne peut pas vous offrir cette publication en texte intégral pour l'instant. Le texte intégral est accessible chez l'éditeur. DOI: 10.2478/ncr-2019-0014.
  • Informations
    sur cette fiche
  • Reference-ID
    10705847
  • Publié(e) le:
    19.02.2023
  • Modifié(e) le:
    19.02.2023
 
Structurae coopère avec
International Association for Bridge and Structural Engineering (IABSE)
e-mosty Magazine
e-BrIM Magazine