Product Data Sheet Show all documents
King® MS-W1 UG

King® MS-W1 UG

SHOTCRETE MATERIAL FOR WET-MIX PROCESS FOR UNDERGROUND APPLICATIONS

King® MS-W1 UG 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
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 local Sika Technical Representative for more information.
      STEEL FIBRE     
  • Significantly increased load-carrying capacity
  • Significantly increased energy absorption capacity (toughness)
  • Significantly increased impact resistance
    Product Dosage of fibres King® MS-W1 UG STA high King® MS-W1 UG STBmediumKing® MS-W1 UG STClow King® MS-W1 UG STD very low    
    EXAMPLES:
    • King® MS-W1 UG with Gradation No. 1, the name of the product would be King® MS-W1 UG G1
    • King® MS-W1 UG with a high dosage of macro-synthetic fibre and Gradation No. 2, the name of the product would be King® MS-W1 UG MFB.
    • King® MS-W1 UG with a medium dosage of steel fibre and Gradation No. 2, the name of the product would be King® MS-W1 UG STB.

    Packaging

    • 30 kg (66 lb) triple-lined bags
    • 1 000 kg (2 205 lb) FIBC


    *Custom packaging is available to suit specific project requirements

    Product Details

    Sustainability / Certifications / Approvals

    APPROVALS / CERTIFICATES

    GRADATION

    • By default King® MS-W1 UG is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 2
    • MS-W1 UG G1 is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 1
     
    Product Information

    Shelf Life

    12 months in original, unopened packaging

    Storage Conditions

    Material should be stored in a dry, covered area, protected from the elements. Physical properties of  may be adversely aff ected if material is
    stored in temperatures below 0 °C (32 °F). Material stored below these temperatures should be allowed to warm to ambient underground
    temperatures before shooting.
    Technical Information

    Compressive Strength

    8 Hours

    5 MPa (725 psi)

    12 Hours

    10 MPa (1500 psi)

       

    1 Day

    15 MPa (2175 psi)

    3 Days

    28 MPa (4060 psi)

    7 Days

    32 MPa (4640 psi)

    28 Days42 MPa (6000 psi)

    Tensile Strength in Flexure

    ASTM C 78

    King® MS-W1 UG

    King® MS-W1 UG ST

    28 days

    6.5 MPa (940 psi)

    8 MPa (1160 psi)

    Porosity

    BOILED ABSORPTION

    6.0%

    		ASTM C 642

    MAXIMUM VOLUME OF PERMEABLE VOIDS

    15.0%

    ASTM C 642

    Application

    Application Information

    Flowability

    SLUMP*

    200 mm (8") ± 50 mm (2")

    ASTM C 143

    Pot Life

    4 hours*

    Curing Time

    Good curing conditions are beneficial to optimizing the physical properties of King® MS-W1 UG. Although the high relative humidity commonly found in underground environments provides for good curing conditions, additional curing is often appropriate and should be performed in accordance with ACI 308 “Guide to Curing Concrete”.

    Setting Time

    Initial

    		< 10 minutes

    Final

    		< 45 minutes
    Consumption

    Yield

    Approx. 0.465 m3 (16.5 ft3) / 1,000 KG (2,205 lb) bag

    * Yield in service may slightly vary according to projects conditions 
    Application steps

    SURFACE PREPARATION

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

    APPLICATION

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

     

    OPTIMUM PERFORMANCE

    • Product should not be applied when ambient, substrate and material temperatures are below 5 °C (40 °F).
    • Performance of in-place shotcrete relies heavily upon application techniques. To ensure optimum quality of in-place shotcrete, the material, equipment and key personnel should be pre-qualified prior to project start-up.

    CLEAN UP

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

     

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