TUNNELING ANNULUS GROUT
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United States of America Patent
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Issued Date -
Aug 7, 2014
app pub date -
Jul 16, 2013
filing date -
Feb 7, 2013
priority date (Note) -
Abandoned
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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.
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