Product Data Sheet Show all documents

King® MS-W1 UG

SHOTCRETE MATERIAL FOR WET-MIX PROCESS FOR UNDERGROUND                APPLICATIONS

King® MS-W1 UG is a silica fume enhanced, pre-packaged, shotcrete material for wet-process applications. This product is a pre-blended, pre-packaged, wet-process, shotcrete material containing Portland cement, silica fume, blended aggregates and other carefully selected components. It has greatly enhanced shooting characteristics and physical properties.

  • Improved pumpability and shootability
  • Improved adhesive and cohesive plastic properties
  • Significantly reduced rebound, resulting in lower material usage
King® MS-W1 UG
Product Data Sheet Show all documents

Usage

  • Ground support applications for mining, tunneling and other underground openings
  • Construction of underground bulkheads, backfill barricades, pillars, ventilation walls and other underground concrete structures

Advantages

  • Improved pumpability and shootability
  • Improved adhesive and cohesive plastic properties
  • Significantly reduced rebound, resulting in lower material usage
  • Improved ability to build greater thicknesses in a single pass in both vertical and overhead orientations
  • Improved resistance to water wash-out
  • Improved resistance to sulphate attack
  • Low permeability
  • Low shrinkage
     OPTIONAL FEATURES & BENEFITS      Set-time / Strength Gain Liquid accelerator can be added at the nozzle to reduce set time and increase early age strength gain.    Contact your Sika STM Technical Representative for more information.    Steel Fiber (ST)
  • Significantly increased load-carrying capacity
  • Significantly increased energy absorption capacity (toughness)
  • Significantly increased impact resistance
    Product Dosage of Fiber King® MS-W1 UG STA High King® MS-W1 UG STBMediumKing® MS-W1 UG STCLowKing® MS-W1 UG STDVery Low     Gradation (G1)
  • By default King® MS-W1 UG is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 2
  • King® MS-W1 UG G1 is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 1
    EXAMPLES:
  • For King® MS-W1 UG with gradation No. 1, the name of the product would be:
    King® MS-W1 UG G1.
  • For King® MS-W1 UG with a medium dosage of steel fiber and gradation No. 2, the name of the product would be:
    King® MS-W1 UG STB.

Packaging

66 lb (30 kg) bag

2205 lb (1000 kg) FIBC* 

Products containing Steel fibers (ST) can only be packaged in FIBC*

Custom packaging is available to suit specific project requirements

*Flexible Intermediate Bulk Container

Product Details

Product Information

Shelf Life

Unopened bags have a shelf life of 12 months.

Storage Conditions

Store in a dry, covered area, protected from the elements between

40°F - 95°F (5°C - 35°C)

Physical properties may be adversely affected if material is stored in temperatures below 40°F (5°C) and should be allowed to warm to ambient underground temperatures before application
Technical Information

Compressive Strength

ASTM C116 (modified)

8 Hours

725 psi (5 MPa)

12 Hours

1500 psi (10 MPa)

  

ASTM C1604

1 Day

2175 psi (15 MPa)

3 Days

4060 psi (28 MPa)

7 Days

4640 psi (32 MPa)

28 Days6000 psi (42 MPa)

Flexural Strength

ASTM C78

King® MS-W1 UGKing® MS-W1 UG ST

28 Days

940 psi (6.5 MPa)

1160 psi (8 MPa)

Porosity

BOILED ABSORPTION

6.0%

ASTM C642

MAXIMUM VOLUME OF PERMEABLE VOIDS

15.0%

ASTM C642

Application

Application Information

Flowability

SLUMP

8 in (200 mm) ± 2 in (50 mm)

ASTM C143

Pot Life

4 hours

Set Time

ASTM C1117

Initial

< 10 minutes

Final

< 45 minutes
Consumption

Coverage

Approx. 0.5 ft3 per 66 lb bag (0.014 m3 per 30 kg bag)

Approx. 0.61 yd3 per 2205 lb FIBC (0.45m3 per 1000 kg FIBC)
Application steps

SURFACE PREPARATION

  • Rock Surfaces: All surfaces to be in contact with King® MS-W1 UG must be free from dust, oil, grease or any other foreign substances that may interfere with the bond of the material. Remove all loose or delaminated rock. Clean the area with potable water, leaving the substrate saturated but free of standing water (SSD).

MIXING

Mix material at a maximum water content of 24.5 US gallons (92.6 L) per 2,205 lb (1,000 KG) bag. For mixing instructions, follow recommendations of concrete mixer manufacturer. For custom mix designs developed to meet specific project requirements, contact
your Sika STM Technical Representative.

 

APPLICATION

Apply King® MS-W1 UG in accordance with the ACI 506 “Guide to Shotcrete” publication.

  

Performance of in-place shotcrete relies heavily upon application techniques. The shotcrete material, equipment and key personnel should be pre-qualified prior to project start-up to ensure optimum quality of in-place shotcrete.

  

OPTIMUM PERFORMANCE

  

  • King® MS-W1 UG should not be applied when ambient, substrate and material temperatures are below 40 °F (5 °C) or above 95 °F (35 °C).
  • For adverse temperatures, follow ACI recommendations for Cold / Hot Weather Concreting.

   

Contact your Sika STM Technical Representative for more information.

CURING TREATMENT

Curing is essential to optimize physical properties of the shotcrete and minimize plastic shrinkage. King® MS-W1 UG should be cured immediately after material has reached initial set in accordance with ACI 308 “Guide to Curing Concrete”. Continuously moist cure for a minimum period of 7 days. Alternatively, moist cure for a minimum period of 24 hours and apply a curing compound that complies with ASTM C309. Curing is particularly critical in rapid moisture loss conditions such as high temperatures, high winds and low humidity.

CLEANING OF TOOLS

Clean all tools and equipment after use with water. Once hardened, the product can only be removed mechanically.

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