JPS5937398B2 - Cartridge for lock bolt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the mooring of reinforcing elements, such as steel rock bolts or wooden dowels, by cementitious grouting in a borehole in the roof of a rock debris site, such as an underground mine.

Grouting is introduced during drilling in the form of a cartridge,
It becomes active in situ on contact with the reinforcing element and immediately forms a hardened cementitious grout in the annular cavity between the reinforcing element and the wall of the drilled hole, during which the reinforcing element is being drilled within a very short time. be firmly moored at

In the last ten years, the most convenient and technically advantageous method of arranging reinforcing elements in drillings in rock debris has been the use of one or several frangible plastic cars (IJ wedges) pushed into the borehole.
The reinforcing element is then rotated and inserted into the borehole to break the cartridge and mix its contents to form a resinous grout around the reinforcing element in the borehole, thereby anchoring the reinforcing element in the borehole. This was the way to do it.

These resinous cartridges are often filled with an unsaturated polyester resin and a curing agent therefor, e.g. in a two-chamber cartridge until the unsaturated polyester resin and curing agent are mixed together by the action of reinforcing elements. They are separated from each other.

Cartridges containing unsaturated polyester resins are hazardous for certain applications, which has recently attracted particular attention.

The poor flame resistance and toxicity of the combustion products make the cartridges very dangerous, especially when used in enclosed areas such as coal mines.

It is an object of the present invention to provide a frangible cartridge for rock bolts that eliminates the risks associated with flammability and toxicity of polyester-based cartridges.

To achieve this objective, according to the invention, component (4) consisting of an aqueous liquid and an alkali metal silicate and optionally an alkali metal siliconate is placed in a separate chamber, and when in contact with the alkali metal silicate, the alkali metal silicate is from a tubular frangible outer casing containing component (B) consisting of an alkali metal silicate gelling agent and optionally a hydraulic substance forming a gel from which a grouting composition is capable of anchoring the reinforcing element during drilling; Provided is a cartridge for mooring reinforcing elements during drilling, characterized in that the cartridge is characterized in that:

According to one embodiment of the invention, component (B) also includes a hydraulic substance, and the gelling agent in component (B) is inert with respect to the hydraulic substance, and when used, component (3) , (B
) is mixed in situ, the hydraulic material hardens in contact with the aqueous liquid of component (5), forming a solidified mass that helps anchor the reinforcing element during drilling.

The cartridge according to the invention has one chamber formed by a frangible inner casing arranged inside a longitudinally extending frangible outer casing, and the other chamber formed by an annular space between the inner casing and the outer casing. It may be configured so that

The outer chamber may contain the component (B) and the inner chamber may contain the component, or vice versa.

As the alkali metal silicate, sodium silicate or potassium silicate is used, and sodium silicate is particularly suitable because it is inexpensive and generally easily available.

Component (5) is formed by mixing an aqueous solution of sodium or potassium silicate with solid sodium or potassium silicate, such as spray-dried sodium silicate.

The silica/alkali metal oxide molar ratio of the alkali metal silicate is preferably 1.65 to 3.3:1.

This ratio may also be increased by adding solid silica, preferably in finely divided form.

The aqueous liquid in component CO is usually water. The gelling agent contained in component (B) is a substance that can convert the alkali metal silicate in the ingredient list into a gel, and these gelling agents include:
esters and partial esters of fatty range carboxylic acids such as acetic acid and acid-forming substances such as formic acid, acetic acid, propionic acid, phosphoric acid, nitric acid or sulfuric acid with alcohols, glycols or polyols, acid chlorides, acid anhydrides, acid amides and lactones; Examples include β-propiolactone or r-butyrolactone.

In addition to or in place of these gelling agents, solid gelling agents such as ammonium or alkali metal chlorides, bromides, sulfates, nitrates, bicarbonates, hydrogen phosphides, pyrophosphates, bisulfates, sulfites, aluminates, zincates, fluorosilicates, silicides, fluoroborates, or boric acids, or water-soluble acid alkali metal or ammonium salts of organic acids, such as potassium hydrogen tartrate, or acid solutions by hydrolysis. Water-soluble reactive salts of polyvalent metals that form, such as aluminum chloride, zinc bromide, magnesium nitrate or ferric sulfate, or oxides, hydroxides, carbonates, bicarbonates, silicides, silicates of polyvalent metals, etc. acid salt,
Fluorosilicates, or organic acids or acid-generating substances such as succinic, tartaric, citric, oxalic, phthalic or benzoic acids, sulfonic acids such as benzenesulfonic or p-toluenesulfonic acid, phenol, picric acid, carboxylic acids , esters such as phenylpropionate, 1-naphthyl acetate or benzyl succinate, aldehydes or ketones may be used.

If the gelling agent is not in liquid form, non-aqueous liquids such as polypropylene glycol, propylene glycol, triethylene glycol or glycerol may be used to form the gelling agent.

In a preferred embodiment of the invention, in which the alkali metal silicate gelling agent is mixed with a hydraulic material, preferably a hydraulic cement, the gelling agent is inert to the hydraulic material and is compatible with the hydraulic material. It must be compatible with curing processes involving the hydraulic material upon contact with the aqueous liquid in component (5).

That is, the gelling agent must not inhibit the curing process so as to prevent the grouting composition made from components (5), (B) from obtaining sufficient strength for use in mooring reinforcing elements such as rock bolts. .

When the cement cartridge of the present invention is used in a coal mine, it is desirable that the flash point of the gelling agent be 100° C. or higher.

Liquid gelling agents found suitable for use in the cartridges of the present invention include polyols, preferably glycols or glycerol and lower aliphatic carboxylic acids such as polypropylene glycol monoacetate, triethylene, glycol diacetate, glyceryl, It is an ester or partial ester formed from 3-diacetate (also known as diacetin) and glyceryl triacetate (also known as triacetin).

Water-soluble substances that can affect the physical properties of the grouting composition, such as cure time, rheology, strength, etc., may be added to the components and/or component (B); (B) shall not significantly limit the shelf life of the product.

Examples of these substances are potassium or sodium hydroxides, sulfides, hydrosulfides, sulfites, nitrites, carbonates, halides, nitrates, sulfates or permanganates, or alkali metal salts of organic acids. For example, sodium acetate or potassium sulfonate toluene, or organic compounds such as glycerol, glycols such as triethylene glycol and polyols such as trimethylolpropane.

Water-insoluble inert thickeners or fillers in various physical forms, e.g., powder, fiber, or flake, can be added to each mixture or to the physical properties of the mixed grouting composition, e.g., rheology or phase separation. It may be added to component (5) and/or component (B) for control purposes.

Examples of these are china clay, silica or powdered limestone, glass fibers, natural rubber and synthetic polymers.

Small amounts (
1% or less) of a wetting agent or surfactant (e.g. glyceryl monooleate) in the component and/or component (B).
) may be added.

Hydroxyl-containing, water-miscible organic compounds such as glycerol, polypropylene glycol, and triethylene glycol are used as substances to reduce immersion from the grouting composition during curing.
It is advantageous to add it to Bi.

Although the flammability of cartridges according to the invention is considerably lower than that of cartridges based on conventional styrenated unsaturated polyester resins, flame retardant additives such as triammonium phosphate, trisdichloropropyl phosphate, etc. , ammonium chloride, 1:1:1
The flammability of the cartridge can be further reduced by adding trichloroethane or antimony oxide to component (B), typically a halogenated compound such as a chlorinated or brominated hydrocarbon.

Components (A) and (B) of the cartridge of the present invention advantageously have the following composition.

(~ parts by weight Alkali metal silicate 10-25 Alkali metal siliconate O-15 Aqueous liquid 10-40 Water-soluble additive O-10 Water-insoluble additive O-50 (B) Gelling agent 0.1-20 Water-soluble addition agent
0-10 Water-insoluble additives O-60 In a preferred embodiment of the invention in which component (B) comprises a hydraulic substance, the hydraulic substance is a hydraulic cement such as Portland cement, high alumina cement, sicalcium silicate or metallurgical slag. , hydraulic solids such as calcium sulfate or gypsum plaster, or component (5)
It may be an oxide or hydroxide of calcium, magnesium or iron which can harden into a hard mass when mixed with the phosphoric acid or phosphate solution which may be present in Mixtures may also be used.

In the embodiments described above, substances that may affect the water availability of the hydraulic material may be included in component (A) 1 and/or component (B), but these substances may affect the shelf life of the mixture or It must not have an adverse effect on the reactivity or rheology of the grouting composition.

Thus materials include accelerators, moderators (eg, borax for hydraulic cements), glidants, water reducers, suspending agents, and the like.

In an embodiment in which component (B) contains a hydraulic substance, the composition ratio of components (5) and (B) may be as follows.

(~ parts by weight Alkali metal silicate 25-60 Alkali metal siliconate O-30 Aqueous liquid 20-80 Water-soluble additive O-15 Water-insoluble additive 0-100 (B) Gelling agent 0.1-50 Non-aqueous liquid (
Vehicle) 0-40 Hydraulic substance 10-85 Water-soluble additives 0-20 Water-insoluble additives O-40 Cartridges according to the present invention can be made using a variety of suitable materials.

The choice of casing material is made to some extent according to the relative positioning of components (A) and (B) inside the cartridge.

Component (B) is anhydrous but may contain a relatively strong solvent, and component (3) is aqueous.

Therefore, the use of materials such as polyethylene or other polyolefins, polyester or other thermoplastic laminate materials as the frangible casing in the composition diagram, and the use of some of these materials as the frangible casing of component (B). I can do it.

Alternatively, the ingredients may be packaged in containers made of water-sensitive materials, such as vegetable parchment, regenerated cellulose, collagen, and similar containers commonly used in the food industry.

Thus, in embodiments where component (4) is the inner part of the cartridge and component (B) is its outer part, the inner tube may be made of high density polyethylene and the outer casing may be made of viscose treated paper. desirable.

Conversely, if the component diagram is the outer part of the cartridge and component (B) is housed in the inner tube, both casings will come into contact with the aqueous component (5), so both casings need to be water resistant. .

Although the casing materials described above are suitable for use with flexible cartridges, other materials may be used when manufacturing rigid cartridges for certain purposes.

Suitable tubular cartridges may be manufactured, for example, from glass, polystyrene, polycarbonate resin or thermoset resins, such as phenolic adhesive paper.

The inner component (5) or (B) may be housed in an inner rigid tube and the outer component (B) or (5) in a flexible casing, or vice versa.

Suitable combinations can be made with due care taken to make any casing material in contact with component (5) of the cartridge water resistant.

The cartridges of the present invention can be manufactured by a simple process using conventional cartridge extrusion or cutting equipment.

The inner and outer components are prepared in suitable mixers of the type commonly used in the preparation of pastes of low or moderate viscosity in the manufacture of coatings and sealants.

Examples of such mixers are ribbon blade, Z-blade or high speed disperser types.

Next, an example will be described.

Example 1 A paste consisting of 5.8 parts by weight of propylene glycol monoacetate and 20 parts by weight of limestone powder was filled in a length container (diameter 30 mm) of thin gauge tubular polyethylene film in a conventional manner. In a length of tubular polyethylene film (40 mm diameter) containing a mixture consisting of 14.5 parts by weight of sodium acid solution, 2.5 parts by weight of spray-dried aqueous sodium silicate and 3.8 parts by weight of glycerol, the above A grouting cartridge was prepared by embedding a container filled with the paste.

The filled two-chamber cartridge, approximately 10-15 m in length, was passed through a dual cutting device to cut both ends of the cartridge to form the required sausage-shaped cartridges, each approximately 30 CrrL long.

Example 2 A grouting cartridge was prepared as described for Example 1, but in this example the inner tube contained 5 parts by weight of diacetin (glyceryl diacetate), 5 parts by weight of triacetin (glyceryl triacetate) and The outer tube is filled with a paste consisting of 15 parts by weight of silica powder, 17.3 parts by weight of aqueous sodium silicate solution, 5.9 parts by weight of spray-dried aqueous sodium silicate, 6.5 parts by weight of glycerol and silica powder. Filled with paste consisting of 10 parts by weight.

Example 3 A mixture of 84 parts by weight of a 48.5% aqueous sodium silicate solution with a silica/sodium oxide molar ratio of 2.47:1 and 19 parts by weight of glycerol was added to a length of thin gauge tubular polyethylene. Film (diameter 3
0) and then filled with a paste consisting of 100 parts by weight of high alumina cement, 14.5 parts by weight of propylene glycol monoacetate, 11.3 parts by weight of diacetin and 0.5 parts by weight of glycerol monooleate. A grouting cartridge was prepared by embedding the first-mentioned tubular polyethylene film in a polyethylene film (40 mm in diameter) according to a conventional method.

The filled two-chamber cartridge, approximately 10-15 meters in length, was passed through a dual cutter and each end of the cartridge was cut to form the required sausage-shaped cartridges, each approximately 30 CIIL in length.

The four grouting cartridges thus formed were inserted into holes with a diameter of 43 blades and a length of 2 m that had been drilled in the trench of a coal mine, and a wooden (lamin) dowel with a length of 2 m and a diameter of 36 mvt was inserted into a standard hole. A type of coal mining hole drill was used to drive the cartridge through the cartridge.

This took 30 seconds. Example 4 A grouting cartridge was prepared as described in Example 3, but in this case a 43.6% by weight aqueous sodium silicate solution with a silica/sodium oxide molar ratio of 2.58:1. 29 parts by weight and glycerol7.
A cartridge was prepared by filling the inner tube with 6 parts by weight of the mixture and filling the outer tube with a paste consisting of 29.5 parts by weight of ordinary Portland cement and 9.6 parts by weight of diacetin.

Example 5 A grouting cartridge was prepared as in Example 3, but in this case aqueous sodium silicate 43.6 with a silica/sodium oxide molar ratio of 2.58:1.
29 parts by weight of a wt. Fill the inner tube with a mixture of
A cartridge was prepared by filling the outer tube with a paste consisting of 25 parts by weight of high alumina cement, 25 parts by weight of regular Portland cement, and 12.5 parts by weight of a 1=1 mixture of triethylene glycol diacetate/diacetin.

Example 6 A grouting cartridge was prepared in the same manner as in Example 3, but in this case, a 42.3 wt% aqueous sodium silicate solution with a silica/sodium oxide molar ratio of 2.74:1 and a silica/ Sodium oxide molar ratio 2.0
7:1 spray-dried water-soluble sodium silicate4.
The inner tube was filled with a mixture of 5 parts by weight of glycerol and 6.5 parts by weight of glycerol, 40 parts by weight of high alumina cement, and 1:1 mixture of 1-diacetate/diacetin (1:1).
1 part by weight, 6 parts by weight of aceticef trioxide and 1:1:1
- A cartridge was prepared by filling an outer tube with a paste consisting of 4 parts by weight of trichloroethane.

Example 7 A grouting cartridge was prepared as described in Example 3, but in this case a 42.1% by weight aqueous sodium silicate solution with a silica/sodium oxide molar ratio of 2.07:1. The inner tube was filled with a mixture of 29 parts by weight and 4.5 parts by weight of spray-dried water-soluble sodium silicate with a silica/sodium oxide molar ratio of 2.07:1, 40 parts by weight of autoclaved gypsum plaster, and 40 parts by weight of autoclaved gypsum plaster. A cartridge was prepared by filling an outer tube with a paste consisting of 0.8 parts by weight of acid powder and 12 parts by weight of polypropylene glycol.

Example 8 A paste consisting of 10 parts by weight of propylene glycol monoacetate, 6 parts by weight of high alumina cement, 60 parts by weight of silica sand and 0.2 parts by weight of glycerol monooleate was applied to a thin gauge tubular polyamide film (diameter 29 parts by weight of aqueous sodium silicate with a silica/sodium oxide molar ratio of 2.5:1 and a silica/sodium oxide molar ratio of 2.0.
:1 spray-dried water-soluble sodium silicate 4.5
A tubular polyethylene film having a length of 73 CrrL filled with a solution consisting of 7.6 parts by weight of glycerol and
A grouting cartridge was prepared by embedding a first tubular polyamide film in diameter 22ii) and the ends of both tubes were sealed to prevent leakage of their contents.

The cartridge thus obtained was inserted into a borehole of diameter 287IL11L drilled to a depth of 70cm in a concrete block, and a length of 92Cr was drilled through the cartridge until it reached the bottom of the borehole using an air drill at 500 rpm.
rL, I screwed in a lever bolt with a diameter of 19mm.

The next day, a hydraulic jack was used to apply a load to the bolt, and the mooring load was measured until the bolt began to move outward from the hole.
A value of 13 tons was obtained.

Example 9 A thin gauge tubular polyamide film (diameter 13.5 mm) with a length of 70 crrL was filled with a paste consisting of 5 parts by weight of diacetin, 5 parts by weight of triacetin, 10 parts by weight of silica powder and 37.5 parts by weight of silica sand, 29 parts by weight of aqueous sodium silicate with a silica/sodium oxide ratio of 2.5/1, a silica/sodium oxide ratio of 2.
．． Length 73 containing a mixture consisting of 4.5 parts by weight of spray-dried water-soluble sodium silicate powder at O/1, 7.6 parts by weight of glycerol and 22 parts by weight of silica powder.
Tubular polyamide film of CrIL (2.2 mm diameter
) and a fourth tubular polyamide film was embedded in the tube and the ends of both tubes were sealed.

The thus obtained cartridge was formed in a concrete block to a depth of 70 CI11. A lever bolt with a diameter of 19 mvt was inserted into a hole with a diameter of 28 mm, and a 500 rpm drill was used to screw a lever bolt with a diameter of 19 mvt through the cartridge to the bottom end of the hole.The next day, when a load was applied to the bolt using a hydraulic jack, the bolt was removed. was destroyed under a load of 14 tons.

Example 10 A cartridge was prepared as described in Example 9, but in this case 2.5 parts by weight of diacetin, 2.5 parts by weight of triacetin, 1.5 parts by weight of tartaric acid, 8 parts by weight of silica powder.
．． The inner tube was filled with a mixture consisting of 5 parts by weight and 20 parts by weight of silica sand.

The cartridge was tested for bolt mooring capacity as in Example 9 with a maximum value of 8.5 tons after 3 hours.

Example 1 ■ A cartridge was prepared in the same manner as in Example 9, but in this case 2.5 parts by weight of diacetin, 2.5 parts by weight of triacetin, 2 parts by weight of ammonium carbonate, and 8.5 parts by weight of silica powder.
The inner tube was filled with a mixture consisting of parts by weight and 20 parts by weight of silica sand.

The cartridge was tested in the same manner as in Example 9, and a maximum value of 7.5 tons was obtained after 3 hours.

Example 12 The following four compositions A1. A2. A3. A4 paper was used.

The four compositions were pastes of approximately the same stiffness.

Each filled tube was treated with 29 parts by weight of aqueous sodium silicate with a silica/sodium oxide ratio of 2.5/1, 4. spray dried aqueous sodium silicate with a silica/sodium oxide ratio of 20:1 5 parts by weight of glycerol, 7.6 parts by weight of glycerol, and 22 parts by weight of silica powder was embedded in a 73-F tubular polyamide film (diameter 22 mm), and both ends of each tube were sealed.

Each cartridge thus obtained was inserted into a hole with a depth of 70 cfIL and a diameter of 28 mm formed in a concrete block, and drilled with a length of 92 mm using a 500 rpm drill.
A CrrL1 19 mm diameter lever bolt was threaded completely through each cartridge.

After 1 hour, a load was applied to the bolt using a hydraulic jack, and the anchoring value until the bolt began to move outward from the hole was measured, and the following values were obtained.

The benefits of adding cementitious fillers into the grouting composition, even at relatively low levels of about 8% by weight of the total grouting composition, are demonstrated by this example.

Example 13 A paste consisting of 5 parts by weight of diacetin, 5 parts by weight of triacetin, 10 parts by weight of silica powder, 30 parts by weight of silica sand and 7 parts by weight of high alumina cement was applied to a thin gauge tubular polyamide film (13.5 mm in diameter) with a length of 70 cfrL. )
29 parts by weight of aqueous sodium silicate with a silica/sodium oxide ratio of 2.571, 4.5 parts by weight of spray-dried aqueous sodium silicate with a silica/sodium oxide ratio of 2.0/1, glycerol Length 7 containing a mixture consisting of 7.6 parts by weight and 22 parts by weight of silica powder
The first tubular polyamide film was embedded in a 3-F tubular polyamide film (22 cm in diameter) and both ends of both tubes were sealed.

The cartridge thus obtained was tested for mooring ability as described in Example 9, and after being left for 10 hours to cure the grouting composition, the bolts were
3.5) It was destroyed under a load of 3.5).

Example 14 A cartridge was prepared in the same manner as described in Example 9, except that the inner tube had a diameter of 16 mm and contained 5 parts by weight of diacetin, 5 parts by weight of triacetin, 30 parts by weight of high alumina cement, and silica. The inner tube was filled with a composition consisting of 3.5 parts by weight of powder and 13 parts by weight of silica sand.

The composition filled in the outer tube was the same as in Example 9.

The cartridge was tested as described in Example 9.

diameter 1 after 3 hours after insertion through the cartridge.
When I pulled a 9mvt Revo bolt, the bolt was 1
It broke under a load of 3 tons.

Example 15 A cartridge was prepared as described in Example 9, but in this case 48 parts by weight triethylene glycol di(monochloro)acetate, 2 parts by weight triethylene glycol diacetate, 2 parts by weight diacetin, A mixture consisting of 30 parts by weight of high alumina cement, 8 parts by weight of antimony trioxide, 4 parts by weight of silica powder, and 15 parts by weight of silica sand was filled into an inner tube with a diameter of 16 mm.

This composition was found to be self-extinguishing when tested in a Bunsen burner.

The outer tube of the cartridge was filled with the same assembly as in Example 9.

The mooring capacity of the cartridge was tested as described in Example 9 and was 10 tons after 8 hours.

Example 16 A grouting cartridge was prepared in the same manner as in Example 9, but in this case, a paste consisting of 6 parts by weight of diacetin, 4 parts by weight of triacetin, 21 parts by weight of calcite powder, and 12 parts by weight of silica sand was mixed into a grouting cartridge with a diameter of 14. A 5 mm inner tube was filled with 29 parts by weight of aqueous sodium silicate with a silica/sodium oxide ratio of 2.5:1 and a spray-dried water-soluble silicate with a silica/sodium oxide ratio of 2.0:1. 4.5 parts by weight of sodium acid powder and 7.6 parts of glycerol
An outer tube with a diameter of 22 mm was filled with a liquid consisting of parts by weight, and both ends of the two tubes were sealed.

The cartridge was tested for bolt mooring capacity as described in Example 9 and a maximum value of 12 tons was obtained after 2.5 hours.

Example 17 A grouting composition was prepared as described in Example 13, but in this case 7 parts by weight diacetin, 3 parts by weight triacetin, 19 parts by weight calcite powder, 12 parts by weight silica sand, and high alumina cement. A 14.5 mm diameter inner tube was filled with a paste consisting of 5 parts by weight of aqueous sodium silicate 2 with a silica/sodium oxide ratio of 2.5/1.
A liquid consisting of 9 parts by weight, 4.5 parts by weight of water-soluble sodium silicate spray-dried with a silica/sodium oxide ratio of 2.071, and 7.6 parts by weight of glycerol was poured into a tube with a diameter of 22 m.
The outer tube of m was filled.

The cartridge thus obtained was tested for bolt mooring capacity as described in Example 9 and obtained a maximum value of 12 tons after 2.5 hours of curing.

Example 18 This example relates to the use of a gelling agent for alkali metal silicate, calcium aluminate, a high alumina cement used in the preparation of component B of the cartridge.

A cartridge was prepared as described in Example 9, but in this example, 40 parts by weight of high alumina cement and 8 parts by weight of [Celechlor 50 LVJ (chlorinated hydrocarbon liquid)]
．． A paste consisting of 8 parts by weight was placed in an inner tube with a diameter of 17.5 mm, and the silica/sodium oxide ratio was adjusted to 2. O/1
12.4 parts by weight of aqueous sodium silicate and 3 parts by weight of water
．． Put a liquid consisting of 6 parts by weight into an outer tube with a diameter of 22 mm,
Both ends of the two tubes were sealed.

The non-flammable car thus obtained was tested and tested as described in Example 9.

When a load was applied to the bolt 18 hours after grouting during drilling, the load when it started to move outside the hole was approximately 1
It was 0 tons.

The embodiments of the present invention are as follows.

(2) The cartridge according to claim 1, wherein the hydraulic substance is hydraulic cement.

2. One of the components (A) and (B) is housed in a tubular frangible inner casing disposed within a tubular frangible outer casing, and the annular space between the inner casing and the outer casing is The cartridge according to claim 1 or embodiment 1, which contains the other component.

3. The cartridge according to claim 1 and any one of embodiments 1 and 2, wherein the alkali metal silicate is sodium silicate.

4. The cartridge according to claim 1 and any one of embodiments 1 to 3, in which a part of the total silicate is used in the form of an aqueous solution and a part is used in the form of a solid. .

5. The composition diagram and/or (B) or claims further including water-soluble or water-insoluble additives for controlling the physical properties of the grouting composition; The cartridge according to Item 1 and any one of Embodiments Items 1 to 4.

6. Claim 1 and embodiments 1 to 6 further include in component (4) and/or (B) a substance capable of reducing liquid immersion from the grouting composition during curing. The cartridge according to any one of item 5.

70. 7. The cartridge according to embodiment 6, wherein the substance is an organic compound having a hydroxyl group that is miscible with water.

8. The cartridge according to embodiment 7, wherein the substance is glycerol.

Claims (1)

[Claims] 1 Component (3) consisting of an aqueous liquid and an alkali metal silicate and optionally an alkali metal siliconate in one chamber.
an alkali metal silicate gelling agent and optionally a hydraulic material which forms a gel from the alkali metal silicate upon contact with the alkali metal silicate to produce a grouting composition capable of anchoring the reinforcing element during drilling. Cartridge for mooring reinforcing elements during drilling, characterized in that it consists of a tubular frangible outer casing containing component (B) consisting of: