King® MS-W1 UG
SHOTCRETE MATERIAL FOR WET-MIX PROCESS FOR UNDERGROUND APPLICATIONS
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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](https://pim2.sika.com/medias/sys_master/root/h58/ha6/8941952172062/02-US-King-Logo-600.png)
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
- Significantly increased load-carrying capacity
- Significantly increased energy absorption capacity (toughness)
- Significantly increased impact resistance
- 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
- 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
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
Compressive Strength
ASTM C116 (modified) |
8 Hours | 725 psi (5 MPa) |
12 Hours | 1500 psi (10 MPa) |
ASTM C1604 |
|
Flexural Strength
ASTM C78 |
King® MS-W1 UG | King® 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
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 |
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)
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.