Tunneling annulus grout
OwnerJesse Osborne, JR.inventor
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Abstract
A grout composition for application to a tunneling surface is disclosed. The grout composition comprises a mixture including cement and at least one of a hydration stabilizer, a polycarbonate-based high range water reducer, and a viscosity modifier. The grout composition further includes water and a sprayed concrete accelerator. The sprayed concrete accelerator may be included in the composition at the time of application.
Claims24
A grout mixture comprising:
- cement;
- and
- at least one of a hydration stabilizer;
- polycarboxylate-based high range water reducer;
- and viscosity modifier.
A method for preparing a grout composition for filling an annulus space comprising:
- mixing cement, and at least one of a hydration stabilizer, a polycarboxylate-based high range water reducer, and a viscosity modifier;
- introducing water into the grout mixture, forming a slurry with a water-to-cement ratio of about 1.0-0.1;
- applying a sprayed concrete accelerator to said slurry forming a grout composition, and
- applying said grout composition into an annulus space.
The method of clam 17, wherein said composition achieves a minimum strength of 0.1 mpa.
A grout composition for application to a tunneling surface, said grout composition comprising:
- a mixture including:
- cement;
- and
- at least one of a hydration stabilizer, a polycarbonate-based high range water reducer, and a viscosity modifier;
- water;
- and
- a sprayed concrete accelerator, wherein said sprayed concrete accelerator is included in said composition at the time of application.
A grout slurry comprising:
- a mixture including:
- cement;
- and
- at least one of a hydration stabilizer, a polycarbonate-based high range water reducer, and a viscosity modifier;
- and
- water, wherein said slurry comprises a flow of not more than 4 minutes.
Dependencies are inferred from the claim text.