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SHOTCRETE AIDS

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SHOTCRETE AIDS

Hind Bolt C pdf1

Category: SHOTCRETE AIDS

USES

  • 1. For immediate repair of water storage tanks and dams
  • 2. To install anchor bolts which are used for fixing of heavy machinery
  • 3. For fixing of anchor bolts for Coal Mine strata stabilization
  • 4. For fixing of anchor bolt for rock stabilization

ADVANTAGES

  • 1. Provides high strength
  • 2. It is fast setting.
  • 3. It is highly resistant to sulphate attack

APPLICATION

Soak the perforated capsules in water for 1 to 2 minutes. Insert the required numbers of water soaked capsules into the holes accommodating the capsules. Insert and push the anchor bolt with help of electrically operated drill. Place and fix the cover plate. All operations should be completed within 8 to 10 minutes.

STANDARD SIZE

25mm dia x 300mm length
28mm dia x 300mm length
32mm dia x 300mm length
40mm dia x 300mm length
Any other sizes to suit the site requirements can be made.

PROPERTIES

Grey colored capsule.

SHELF LIFE

6 months in unopened condition. The material should be stored in dry place, under a shed and away from source of heat. The capsules are manufactured in standard length and diameter depending on customer’s demand. The diameter of the hole is about 10 to 12 mm more than the diameter of anchor.

PACKING

As per requirement

HANDLING PRECAUTION

Hind Bolt C is non-toxic and ingestion is to be avoided. If contact with eyes occur, wash immediately with water and seek medical advice.

Hind Bolt R pdf1

Category: SHOTCRETE AIDS

USES 

Hind Bolt R is used to counter the load and squeezing phenomenon occurring from the reducing residual stress of the rock, after blasting, in a mining or tunneling operation. It reinforces rock strata and prevents freshly exposed overhead rock from collapsing, after each blast.

ADVANTAGES 

  • 1. Increases stand-up time of unsupported span in tunneling.
  • 2. Suitable for a wide range of rocks, even with low RMR.
  • 3. Ideal for fast tunneling work as per NATH.
  • 4. Pre-determinable setting times.
  • 5. High early and final strengths, achievable in minutes.
  • 6. Inert to mother substrates after reaction.
  • 7. Sets as a monolithic mass, even in vibrating and moist conditions.
  • 8. No danger of chemical attacks or fire, to environments.
  • 9. Resistant to salt water, oil, acid, alkali, greases and solvents.
  • 10. Ideal in underground coal mining operations, hydel projects, traffic tunnels.

APPLICATION 

  • 1. Bore a hole by drilling to correct depth and diameter as recommended.
  • 2. Clean the hole thoroughly with compressed air and/or water.
  • 3. Insert appropriate number of capsules one by one to the end of the hole.
  • 4. Attach bolt to rotary machine by means of a spinning adapter and commence rotating/torque                progressively, through capsules until the end of the hole is reached. Detach drill from spinning adapter                (Recommended speed of the rotation 150-250 r.p.m)
  • 5. Leave bolt undisturbed until resin has cured.
  • 6. Remove adapter.
  • 7. After 24 hours tighten the rock bolts finally & the hole is grouted.

PROPERTIES 

   Color Yellow/white
   Size Cylindrical sausages, custom-made to suit the requirement.
   Compressive Strength At 7 hours      –  65 N/mm² (minimum)At 24 hours    –    70 N/mm² (minimum)
   Tensile Strength At 7 hours      –    30 N/mm² (minimum)

 

GUIDELINES 

TABLE A

(Typical results based o 25mm Dia Rock Bolt used)

Ultra High Strength Granite Rocks unconfined Compressive Strength100 N/mm2 High strength Lime stone (calcarious)Rocks unconfined Compressive strength 50N/mm2 Medium strength sand stone (Quartzite)Rocks unconfined Compressive strength15 N/mm 2 Moderately weak strength Mudstone Rocks unconfined compressive strength 7.5 N/mm 2
Anchorage Length (mm) AverageLoad

(MT)

Anchorage Length (mm) AverageLoad

(MT)

Anchorage Length (mm) AverageLoad

(MT)

Anchorage Length (mm) AverageLoad

(MT)

230 9 290 8 400 4.5 640 4.5
270 11.5 360 12 500 9.0 700 6.5
300 17.5 450 18 635 12.0 760 8.5
350 20.0 500 23 765 18.0 890 10.5
890 23.0 1000 13.5

The Chart given below demonstrates ‘HIND BOLT R’ Resin capsule usage chart (site trial data basis)

TABLE B 

Hole diameter (in mm) 25 32 35 38 41 38 41 45
Capsule diameter (in mm) 23 29 32 32 32 35 35 40
Bolt diameter (in mm) Anchorage Length using Single Capsule (in mm) of HIND BOLT R
19 380 330            
22   400 350     315    
25   565 440 315   390 290 300
29       400 290 490 350 340
30         390   465 425
35               570

 SHELF LIFE

3 months from the date of manufacture.

Extended Shelf life can be achieved for 6 months if the following guidelines are followed

a) If stored at room temperature below 27 degree Centrigarde.

b) If protected from direct sunlight.

c) If protected from other sources of heat.

d) Testing of Compressive Strength can be done from time to time (within the shelf life 3-6 months) to check

The quality of the material, if any solidification of the inner materials are found.

PACKING

In Wooden Box as per requirement

HANDLING PRECAUTION 

Hind Bolt R Cartridges are made of plastic film packing containing an inner glass tube. Care should be taken while handling or installation that it does not get pierced by sharp objects and the inner glass tube does not break.

Hind Cem (MF) pdf1

Category: SHOTCRETE AIDS

USES

  • 1. For injection grouting in Basements, Tunnels, Lift wells, Water Reservoirs, Pressure ducts, mines and Pre-stressed cable ducts.
  • 2. Rock and Soil stabilization and effective ground water sealing.
  • 3. Sealing of voids in rock by injection operation.
  • 4. To provide a watertight, impermeable rock and soil mass.
  • 5. Grouting of anchor bolts of machine foundation and columns.

 ADVANTAGES

  • 1. Improved fluidity thus sealing micro-cracks, fissures and pores.
  • 2. Easy to use with Standard cement injection grouting pumps.
  • 3. Fast setting helps in speedy operation of construction activities.
  • 4. Very economical and durable.
  • 5. Non-toxic and safe to handle and non-hazardous.

APPLICATION 

Always use Hind Cem (MF) with Hind Plast Super-Water Reducing Admixture and the dosage varying from 0.1%-1% by weight of Hind Cem (MF). Recommended Powder: Water Ratio (by weight) should normally be between 0.5 – 1.0

Mixing 

Hind Cem (MF) is to be gradually added to water and mixed thoroughly. All quantity of the grout should not be added at one time. Mixing procedure may be carried with a slow paddle mixer (400-450 rpm) or by means of any suitable mechanical mixer. Injection grouting work is now to be done by high pressure pump and the injection operation to be completed with a time period of 30- 45 minutes for better and effective results. Due to its fast setting properties it get set within 2-31/2 hours and allow drilling operation to continue further.

PROPERTIES

Aspect Grey Powder
Fineness (Blaine) > 650 m2 /Kg
                                    Setting Time at 270 C *

(ASTM C – 1102-94)

Initial 90 minutes with 1 : 0.7 (Powder : Water Ratio)115 minutes with 1 : 1   ( Powder : Water Ratio)
Final 160 minutes with 1 : 0.7( Powder : Water Ratio)200 minutes with 1: 1     (Powder : Water Ratio)
Compressive Strength 7 days > 10 Mpa
28 days > 25 Mpa
Chloride Content Nil – as per B.S –5075 (Part-1)

  

  • Compressive Strength is dependent on the Powder: Water Ratio used. Above result for Compressive Strength is based on 1 : 0.5 (Powder : Water Ratio)

SHELF LIFE

6 months from the date of manufacture. Material should be stored in a perfectly covered dry place.            

PACKING

25/50 Kg. in HDPE bag

HANDLING PRECAUTION

Hind Cem (MF) is non-toxic and ingestion is to be avoided. If contact with eyes occurs, wash well immediately with water and seek medical advice.

Hind Set LAF pdf1

Category: SHOTCRETE AIDS

USES

Hind Set LAF is used and suitable for all applications to give high early strength, good final strength and achieving higher thickness in layers of sprayed concrete.

  • 1. Wet shotcrete.
  • 2. Grouting (back filling)
  • 3. Tunnels, Galleries, Mining
  • 4. Slope stabilization, Pit protection.
  • 5. Embankment and excavations
  • 6. Concrete repair work
  • 7. Shoring operation
  • 8. Swimming Pool
  • 9. It can also be used for quick setting of cementitious grouts used in TBM tunnel lining and backfill concreting.

ADVANTAGES

Hind Set LAF is advantageous and ideal for wet shotcreting for rock stabilization.

  • 1. Completely free from alkalis
  • 2. Allows spraying to take place even on wet substrate subject to slight infiltration
  • 3. Speed up the work and contribute to excellent water tightness of the sprayed concrete linings
  • 4. Improves overhead spraying and reduces rebound.
  • 5. Completely free from chloride, nitrate and alkali aluminate, alkali silicate, alkali carbonate based formulations.
  • 6. Eliminates alkali silica reaction even with reactive siliceous aggregate.
  • 7. The quick setting property allows wet sprayed concrete to be done in thick layers hence rapid work progress is achieved.

APPLICATION

Hind Set-LAF to be added by means of a suitable dispensing pump.

PROPERTIES

Aspect Liquid aqueous dispersion
Specific Gravity 1.43   0.05 at 270 C
Solubility Freely mixable with water
pH < 4
Chloride Content <0.1%
Alkali Content < 1%
Hind Set LAF is Sulphate Resistant

MATERIAL SPECIFICATION

The alkali -free shotcrete accelerator, Hind Set LAF is a non-caustic, high solid content admixture. Due to its specific gravity greater than 1.4, the rebound loss for wet shotcrete is minimized and by use of the same more than 150mm thick layer of wet shotcrete is achieved in a single operation. High early strength  (>12 Mpa at 24 hours) and quick final setting (< 15 minutes) is achieved when used in wet shotcrete. It is always advisable that the substrate is clean and free from  loose particles and the cement used  is fresh or otherwise, if the cement is old the setting properties of the mix is affected. The use of Hind Set LAF is very sensitive with different types of cements. Generally Portland cements is used to give good and fast setting. It can also be used with blended & Fly-ash /Slag cements. It is always recommended to check the setting time and 24 hours strength of the cement to be used in the project and the evaluation of the same to be done as per EFNARC European Specification for Sprayed Concrete, Appendix 1, Clause 6.3. The test results mentioned as follows is for guidelines only. (Setting time conforming as per ASTM C 1102-94 standard)

Initial Set Final Set 24 hours strength Remarks
2-2.5 mins 5-8 mins 17-20 Mpa Good
5-6 mins 8-13 mins 12-16  Mpa OK
>10 mins >15 mins <10 Mpa Poor

MIXING GUIDELINES

Hind Set LAF when used for Wet Shotcreting, the Water : Cement  ratio should be less than 0.45 and  for achieving high early strength , faster setting and better durability W/C ratio recommended is 0.40.

DOSAGE

The dosage of Hind Set LAF to be finalized by site trials, however the recommended dosage ranges from 4-10% by weight of binder materials used. Overdosing to a tune of more than 10% results to decrease in final strengths

SHELF LIFE

6 months from the date of manufacture. The material should be stored under shed and away from source of heat.

PACKING

300 Kg. in HDPE container or as required

HANDLING PRECAUTION

Hind Set LAF is non-toxic, if contact with the skin happens it must be washed with water. If contact with eyes occurs, wash well immediately with water and seek medical advice.

Hind Set PAF pdf1

Category: SHOTCRETE AIDS

USES

Hind Set PAF is suitable for Dry Spray/Gunite mixes for Tunnels and Galleries, securing rock faces, embankments and excavations, this section concrete shells, swimming pool, concrete repair works, strengthening concrete structures.

ADVANTAGES

  • 1. Completely free from alkalis
  • 2. Allows spraying to take place even on wet substrate subject to slight infiltration
  • 3. Reacts in the mix to assist the hydration process resulting accelerated strength development within first 24 Hours
  • 4. Simplifies and improved overhead and lateral surface spraying.
  • 5. Reduced rebound loss.
  • 6. ompletely free from chloride, nitrate and alkali aluminate/ carbonate and alkali silicate based formulations.
  • 7. Eliminates alkali silica reaction, which causes expansion and spalling of concrete structure made with alkaline accelerating admixtures

APPLICATION

The required amount of Hind Set PAF is mixed with dry cement-and-gravel mixture. Large quantity of dry-mix can be prepared provided dry aggregate is used and protected from moisture. When Guniting is interrupted care must be taken to ensure that water does not flow back in the supply hose causing the mix to set.

Dosage: Normally between 3 to 4% by weight of cement. When increased to 5 to 7%   setting is quicker and curing time is much reduced.

The optimum dosage should be determined by Site/ Lab trials.

A typical example:

Dosage of Hind Set PAF Initial Set time Final Set time
3% – 4% < 4 minutes < 25 minutes
5% – 7% < 3 minutes < 12 minutes

The above results are based on Cement-OPC. 43 grade, temperature 27ºC, by use of Gillmore Needle. Setting time may vary due to variation in temperature. Setting time tested as per ASTM C – 1102-68 Method of Test.

PROPERTIES

Aspect White Powder
Solubility Freely mixable with water
Bulk Density 850 Kg/cubic metre

SHELF LIFE

12 months from the date of manufacture in unopened condition. The material should be stored under shed and away from source of moisture and dampness.

PACKING

25 Kg. Poly lined HDPE bag & or as required.

HANDLING PRECAUTION

Hind Set PAF is non-toxic but ingestion is to be avoided. If contact with eyes occurs, wash well immediately with water and seek medical advice.

Hind Shot Set L pdf1

Category: SHOTCRETE AIDS

USES

Hind Shot Set L is used for the production of the high quality fast setting shotcrete (wet) and highly economical

  • 1. To secure loose and fragmented rock foundation during tunnel construction.
  • 2. To stabilize soil and rock faces.
  • 3. To secure subterranean excavations

ADVANTAGES     

Hind Shot Set L increases internal cohesion and adhesion of shotcrete.

Significantly reduces the rebound of the mix.

Results in dust free surfaces.

Produces high strength and dense concrete.

APPLICATION 

Hind Shot Set L has to be added by means of a dispensing pump suitable for wet spray method. The dosage varies from 4 to 10 % by weight of cement. Setting time may vary if different cement brands & different grades are used.

PROPERTIES

Aspect Light yellowish/slight greyish/white liquid.
Specific gravity 1.39 ± 0.02 at 27 °C
pH >10
Dry Material Content 40 2
Chloride Content 0.2% Max.
Setting time (Testing using Gillmore apparatus) Initial setting time within 3 Min.Final setting time within 12 Min.

SHELF LIFE

18 months from the date of manufacture. Should be stored in a dry place away from direct sunlight

PACKING

140, 275 kg. in HDPE container or as required.

HANDLING PRECAUTION

Hind Shot Set L is non-toxic but ingestion is to avoided. Any splashes to the skin must be washed with water. If contact with eyes occurs, wash well immediately with water and seek medical advice.

Hind Shot Set P pdf1

Category: SHOTCRETE AIDS

USES

  • 1. Hind Shot Set P is used for the production of the high quality fast – setting shotcrete and is highly economical.
  • 2. To secure loose and fragmented rock foundation during tunnel construction.
  • 3. To stabilize soil and rock faces.
  • 4. To secure subterranean excavations.

ADVANTAGES 

  • 1. Hind Shot Set P increases internal cohesion and adhesion of shotcrete.
  • 2. Significantly reduces the rebound of the gunmix.
  • 3. Results in dust free surfaces.
  • 4. Produces high strength and dense concrete.

APPLICATION

Hind Shot Set P normally used @ 2% to 4 % by weight of cement. When increased to 5% to  6 % setting is quicker and curing time is much reduced.

PROPERTIES 

Aspect White powder
Setting time (Testing using Gillmore apparatus) Initial setting time within 3 Min.Final setting time within 12 Min.

SHELF LIFE 

6 months from the date of manufacture. Should be stored in a dry and covered place

PACKING

25 kg. in HDPE bag or as required.

HANDLING PRECAUTION

Hind Shot Set-P is non-toxic and ingestion is to be avoided. If contact with eyes occur, wash well immediately with water and seek medical advice