Grout for the injection of prestressing cables and method for installing a cable comprising such a grout
AssigneeSoletanche Freyssinet
InventorsChristian TOURNEUR, Julien MERCIER, Ivica ZIVANOVIC, Xavier HALLOPEAU
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Abstract
The invention relates to a geopolymer grout for protecting prestressing reinforcements, the geopolymer grout comprising metakaolin, fly ash and an activator mixture, the activator mixture comprising sodium hydroxide and sodium silicate, wherein the molar ratio Na2O:SiO2 of the sodium silicate is between 0.40 and 0.70.
Claims16
A geopolymer grout for protecting prestressing reinforcements, the geopolymer grout comprising metakaolin, fly ash and an activator mixture, the activator mixture comprising sodium hydroxide and sodium silicate, wherein the Na2O:SiO2 molar ratio of the sodium silicate is between 0.40 and 0.70.
A process for manufacturing a geopolymer grout, the geopolymer grout comprising metakaolin, fly ash and an activator mixture, the activator mixture comprising sodium hydroxide and sodium silicate, the Na2O:SiO2 molar ratio of the sodium silicate being between 0.40 and 0.70, wherein the manufacturing process comprises an activation step in which the metakaolin and the fly ash are activated by the activator mixture in order to obtain polymerization of the aggregate.
A process for installing a structural cable, comprising the following steps:
- fitting a duct containing at least one reinforcement,
- tensioning the reinforcement,
- injecting a geopolymer grout into the duct, and
- wherein the geopolymer grout comprises metakaolin, fly ash and an activator mixture, the activator mixture comprising sodium hydroxide and sodium silicate, the Na2O:SiO2 molar ratio of the sodium silicate being between 0.40 and 0.70.
Dependencies are inferred from the claim text.