King® MS-D1 UG
Accelerated, silica fume enhanced, pre-packaged, shotcrete material for dry-process applications
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King® MS-D1 UG is an accelerated, silica fume enhanced, pre-packaged, shotcrete material for dry-process applications. This product is a pre-blended, prepackaged, dry-process, shotcrete material containing Portland cement, silica fume, set-time accelerator, blended aggregates and other carefully selected components. It has greatly enhanced shooting characteristics providing reduced setting times and rapid strength development.
- Rapid early age strength development
- Improved performance in presence of running water
- Improved adhesive and cohesive plastic properties
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.
- Use of a predampener in conjunction with dry-process accelerated shotcrete is not recommended. Contact your local SikaTechnical Representative for more information.
Advantages
- Rapid early age strength development
- Improved performance in presence of running water
- Improved adhesive and cohesive plastic properties
- Significantly reduced rebound, resulting in lower material usage
- Superior 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
- King® MS-D1 UG contains a level 1 dosage of accelerator
- King® MS-D1 UG2 contains a level 2 dosage of accelerator
- King® MS-D1 UG3 contains a level 3 dosage of accelerator
- By default King® MS-D1 UG is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 2
- King® MS-D1 UG G1 is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 1
For King® MS-D1 UG with Gradation No. 1, the name of the product would be King® MS-D1 UG G1
Packaging
King® MS-D1 UG is normally packaged in 2,205 lb (1000 kg) bulk bags and polywrapped on wooden pallets. Material can also be supplied in 66 lb (30 kg) triple-lined bags. All KING products can be custom packaged to suit specific job requirements.
Product Details
Shelf Life
Unopened bags have a shelf life of 12 months.
Storage Conditions
Material should be stored in a dry, covered area, protected from the elements. Physical properties of King® MS-D1 UG may be adversely affected if material is stored in temperatures below 32 °F (0 °C). Material stored below these temperatures should be allowed to warm to ambient underground temperatures before shooting.
Compressive Strength
| King® MS-D1 UG | King® MS-D1 UG2 | King® MS-D1 UG3 | |
| 4 hours | - | 290 psi (2 MPa) | 1015 psi (7 MPa) |
| 8 hours | 1015 psi (7 MPa) | 1150 psi (8 MPa) | 1450 psi (10 MPa) |
| 12 hours | 1450 psi (10 MPa) | 1750 psi (12 MPa) | 2030 psi (14 MPa) |
| King® MS-D1 UG | King® MS-D1 UG2 | King® MS-D1 UG3 | |
| 1 day | 2900 psi (20 MPa) | 2900 psi (20 MPa) | 2900 psi (20 MPa) |
| 3 days | 4060 psi (28 MPa) | 4060 psi (28 MPa) | 4060 psi (28 MPa) |
| 7 days | 4640 psi (32 MPa) | 4640 psi (32 MPa) | 4640 psi (32 MPa) |
| 28 days | 6000 psi (42 MPa) | 6000 psi (42 MPa) | 6000 psi (42 MPa) |
Flexural Strength
| FLEXURAL STRENGTH | ASTM C 78 |
| 28 days | 985 psi (6.8 MPa) |
Porosity
| BOILED ABSORPTION | ASTM C 642 |
6.0%
| MAXIMUM VOLUME OF PERMEABLE VOIDS | ASTM C 642 |
14.0%
Application
Cure Time
Good curing conditions are beneficial to optimizing physical properties of King® MS-D1 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”.
Thinner
| King® MS-D1 UG | King® MS-D1 UG2 | King® MS-D1 UG3 | |
| Initial | 20 minutes | 10 minutes | 5 minutes |
| Final | 45 minutes | 25 minutes | 10 minutes |
Coverage
2,205 lb (1,000 kg) bag contains approximately 16.5 ft3 (0.45 m3)
SURFACE PREPARATION
All surfaces to be in contact with King® MS-D1 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).
APPLICATION
Apply King® MS-D1 UG in accordance with the ACI 506 “Guide to Shotcrete” publication.
OPTIMUM PERFORMANCE
- King® MS-D1 UG should not be applied when ambient, substrate and material temperatures are below 40 °F (5 °C) .
- Performance of in-place shotcrete relies heavily upon application techniques. To ensure optimum quality of inplace shotcrete, the material, equipment and key personnel should be pre-qualified prior to project start-up.
CLEANING OF TOOLS
Clean all tools and equipment after use with water. Once hardened, the product can only be removed mechanically.