Inorganic cement grouting system for use in anchoring a bolt in a hole and compartmented package for use therewith

Claim 3

A method of claim 1 wherein said first and second components are brought together in said hole by delivery thereto from separate feeding conduits, and mixed in said hole by the rotation of said reinforcing member.

Claim 4

A method of claim 1 wherein said first and second components are delivered into said hole in a frangible package in which they are located in separate compartments, the package is penetrated and broken by said reinforcing member, and said components are mixed by the rotation of said reinforcing member.

Claim 5

In a grouting system for use in a hole in rock strata in combination with a reinforcing member wherein a hardened grout is formed around the reinforcing member in the hole by the reaction of at least two mixed components of a hardenable inorganic grouting composition, thereby anchoring the reinforcing member in the hole, said components being adapted to be forced into an annulus formed between said reinforcing member and the wall of said hole by the introduction of said reinforcing member into said components before any substantial hardening of said composition has occurred, the improvement comprising an inorganic grouting composition comprising controlled amounts of at least two components, the first of said components (a) comprising a slush comprising a particulate inorganic cement and a liquid which is nonreactive therewith, and the second of said components (b), separated from the first, comprising a liquid which is reactive with said inorganic cement, said inorganic cement constituting more than 10 percent by weight of the total weight of components (a) and (b), and said components (a) and (b) being (1) present in the hole, or outside the hole and adapted to be delivered thereto separately or in freshly combined condition; and (2) adapted to be intimately mixed substantially without hesitation after having been combined whereby the mixed components react rapidly to form a hardened grout of sufficient strength to firmly anchor said reinforcing member in said rock strata.

Claim 6

In a grouting system for use in a hole in rock strata in combination with a reinforcing member wherein a hardened grout is formed around the reinforcing member in the hole by the reaction of at least two mixed components of a hardenable inorganic grouting composition, thereby anchoring the reinforcing member in the hole, said components being adapted to be forced into an annulus formed between said reinforcing member and the wall of said hole by the introduction of said reinforcing member into said components before any substantial hardening of said composition has occurred, the improvement comprising an inorganic grouting composition comprising controlled amounts of at least two components, the first of said components (a) comprising a slush comprising a particulate inorganic cement and a liquid which is nonreactive therewith, and the second of said components (b), separated from the first, comprising a liquid which is reactive with said inorganic cement, said inorganic cement constituting more than 10 percent by weight of the total weight of components (a) and (b), and said components (a) and (b) being (1) present in the hole, or outside the hole and adapted to be delivered thereto separately or in freshly combined condition; and (2) adapted to be intimately mixed substantially without hesitation after having been combined whereby the mixed components react rapidly to form a hardened grout of sufficient strength to firmly anchor said reinforcing member in said rock strata.

Claim 7

A grouting system of claim 4 wherein a particulate aggregate is present in at least one of the components of the grouting composition in an amount such as to constitute about from 20 to 80 percent of the total weight of said components.

Claim 8

A grouting system of claim 4 wherein said first and second components are substantially free of curable resin.

Claim 9

A grouting system of claim 4 wherein said first and second components are located in separate feeding conduits for separate delivery to said hold.

Claim 10

A grouting system of claim 4 wherein said components are located in separate compartments of a frangible package in position in said hole, said package being adapted to be penetrated and broken by the reinforcing member, and said components to be mixed in said hole by the rotation of said reinforcing member, hardened grout forming around said reinforcing member so as to secure it firmly in said hold.

Claim 11

A grouting system of claim 5 wherein said inorganic cement is a cement that sets by hydration, and said liquid reactive therewith is water.

Claim 12

A grouting system of claim 5 wherein said liquid nonreactive with said inorganic cement is a hydrocarbon, and said aggregate is sand.

Claim 13

A grouting system of claim 5 wherein said liquid in said second component is thickened by the presence of a polymeric material therein.

Claim 14

A grouting system of claim 9 wherein said grouting composition contains up to about 80 percent cement, about from 2 to 50 percent water, about from 5 to 50 percent hydrocarbon, and about from 20 to 70 percent sand, based on the total weight of the composition, the water/cement weight ratio being about from 0.3 to 0.7, the cement/sand weight ratio being about from 0.25 to 1, and the weight ratio of hydrocarbon to cement being about from 0.1 to 0.7.

Claim 15

A grouting system of claim 9 wherein said cement is calcined gypsum.

Claim 16

A method of claim 1 wherein a particulate aggregate is present in at least one of the components of the grouting composition delivered into the hole.