| 摘要 |
In an inorganic cement grouting system for use in anchoring a reinforcing member such as a rock bolt in a hole, e.g., in a mine roof, by the reaction of the mixed components of the system so as to form a hardened grout around the reinforcing member, which system has the following separate components: (1) a slush or sludgy mass of a particulate inorganic cement that sets by hydration and a liquid which is nonreactive therewith, preferably a hydrocarbon, and (2) water, higher early strength is achieved when the cement is one which contains (by weight) about from 20 to 40 percent of 3CaO.3Al2O3.CaSO4 and about from 10 to 35 percent of chemically unbound CaSO4, the remainder being substantially beta -2CaO.SiO2. The strength advantage obtained with this cement when used in nonaqueous slush form makes it particularly adapted for use in a system for anchoring rock bolts in a mine roof.
|
