EP 4298073 A1 20240103 - A SUSTAINABLE TWO-COMPONENT ANNULAR GROUT COMPOSITION AND METHOD FOR GROUTING A TUNNEL ANNULUS
Title (en)
A SUSTAINABLE TWO-COMPONENT ANNULAR GROUT COMPOSITION AND METHOD FOR GROUTING A TUNNEL ANNULUS
Title (de)
NACHHALTIGE ZWEIKOMPONENTIGE RINGFÖRMIGE VERGUSSMÖRTELZUSAMMENSETZUNG UND VERFAHREN ZUM VERGUSS EINES TUNNELRINGS
Title (fr)
COMPOSITION DE COULIS DE CIMENT À DEUX COMPOSANTS DURABLE POUR ESPACE ANNULAIRE ET PROCÉDÉ DE CIMENTATION D'UN ESPACE ANNULAIRE DE TUNNEL
Publication
Application
Priority
- US 202163154134 P 20210226
- US 202217588942 A 20220131
- US 2022017810 W 20220225
Abstract (en)
[origin: WO2022182934A1] A method and composition are provided for backfilling the annular gap created as a tunnel boring machine advances through the ground. The fill material is comprised of two components that are combined and mixed together just prior to entering the annular gap. The first component is non-cement slurry consisting of a fluidized bed combustion ash such as coal ash. The second component consists of an alkali silicate such as sodium silicate. Additionally, ordinary Portland cement and/or metakaolin can be added to the grout composition.
IPC 8 full level
C04B 28/00 (2006.01); C04B 18/06 (2006.01); C04B 111/70 (2006.01)
CPC (source: EP)
C04B 28/006 (2013.01); C04B 2111/00663 (2013.01); C04B 2111/00724 (2013.01); C04B 2111/70 (2013.01)
C-Set (source: EP)
C04B 28/006 + C04B 7/02 + C04B 12/04 + C04B 14/106 + C04B 18/061
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
US 2022017810 W 20220225; EP 22710836 A 20220225