King® MS-D3 UG
Shotcrete material for dry-process applications
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King® MS-D3 UG is an accelerated, silica fume enhanced, pre-packaged, shotcrete material for dry-process applications. This product is a preblended,
prepackaged, dry-process, shotcrete material containing high early 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 Sika Technical 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-D3 UG contains a level 1 dosage of accelerator.
King® MS-D3 UG2 contains a level 2 dosage of accelerator
King® MS-D3 UG3 contains a level 3 dosage of accelerator.
See the Technical Data section for more detailed information. King® MS-D3 UG LD Low dust, which means the dust content has been reduced as per the CIPAC 5003/m MT 171.1 standard. MACRO-SYNTHETIC FIBER CONTENT
- Significantly increased load-carrying capacity
- Significantly increased energy absorbing capacity (toughness)
- Significantly increased impact resistance
- Significantly decreased wear on placing equipment and accessories when compared with steel fibers
- Ideal for use in man-ways or other areas where people may come in contact with the shotcrete surface
- Reduction of cracking due to drying shrinkage
King® MS-D3 UG MFC contains a medium dosage of macro-synthetic fiber.
King® MS-D3 UG MFD contains a low dosage of macro-synthetic fiber.
See the Technical Data section for more detailed information.
SET TIME/STRENGTH GAIN WITH MACRO FIBER
King® MS-D3 UG MF contains a level 1 dosage of accelerator.
King® MS-D3 UG2 MF contains a level 2 dosage of accelerator.
King® MS-D3 UG3 MF contains a level 3 dosage of accelerator.
See the Technical Data section for more detailed information. STEEL FIBER CONTENT
- Significantly increased load-carrying capacity
- Significantly increased energy absorbing capacity (toughness)
- Significantly increased impact resistance
- Reduction of cracking due to drying shrinkage
King® MS-D3 UG STB contains a medium dosage of steel fiber.
King® MS-D3 UG STC contains a low dosage of steel fiber.
King® MS-D3 UG STD contains a very low dosage of steel fiber.
See the Technical Data section for more detailed information. SET-TIME/STRENGTH GAIN WITH STEEL FIBER
King® MS-D3 UG ST contains a level 1 dosage of accelerator.
King® MS-D3 UG2 ST contains a level 2 dosage of accelerator
King® MS-D3 UG3 ST contains a level 3 dosage of accelerator.
See the Technical Data section for more detailed information.
GRADATION
- By default MS-D3 UG is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 2 MS-D3 UG G1 is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 1
- By default King® MS-D3 UG ST is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 2
- King® MS-D3 UG ST G1 is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 1
- By default King® MS-D3 UG MF is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 2
- King® MS-D3 UG MF G1 is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 1
- For King® MS-D3 UG with Gradation No. 1, the name of the product would be King® MS-D3 UG G1.
- For King® MS-D3 UG ST with a high dosage of steel fiber, a level 2 dosage of accelerator and Gradation No. 2, the name of the product would be King® MS-D3 UG2 STA.
- For King® MS-D3 UG MF with high dosage of macro-synthetic fiber, a level 2 dosage of accelerator and a Gradation No. 2, the name of the product would be King® MS-D3 UG2 MFB.
Packaging
Normally packaged in 2,205 lb (1,000 kg) bulk bags and polywrapped on wooden pallets. 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 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-D3 UG | King® MS-D3 UG2 | King® MS-D3 UG3 | |
| 4 Hours | 290 psi (2 MPa) | 1015 psi (7 MPa) | |
| 8 Hours | 1015 psi (7 MPa) | 1150 psi (8 MPa) | 1500 psi (10 MPa) |
| 12 Hours | 1500 psi (10 MPa) | 1750 psi (12 MPa) | 2030 psi (14 MPa) |
| King® MS-D3 UG | King® MS-D3 UG2 | King® MS-D3 UG3 | |
| 1 Day | 3000 psi (21 MPa) | 3625 psi (25 MPa) | 3625 psi (25 MPa) |
| 3 Days | 4350 psi (30 MPa) | 4350 psi (30 MPa) | 4350 psi (30 MPa) |
| 7 Days | 5075 psi (35 MPa) | 35 MPa (5075 psi) | 35 MPa (5075 psi) |
| 28 Days | 6000 psi (42 MPa) | 6000 psi (42 MPa) | 6000 psi (42 MPa) |
Flexural Strength
FLEXURAL STRENGTH
King® MS-D3 UG
| 28 Days | 985 psi (6.8 MPa) |
King® MS-D3 UG MF and King® MS-D3 UG ST
| 28 Days | 1160 psi (8.0 MPa) |
Porosity
BOILED ABSORPTION
| 6.0% | ASTM C 642 |
MAXIMUM VOLUME OF PERMEABILITY VOIDS
| 14.0% | ASTM C 642 |
Application
Cure Time
Good curing conditions are beneficial to optimizing physical properties of King® MS-D3 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
| Set Time | King® MS-D3 UG | King® MS-D3 UG2 | King® MS-D3 UG3 |
| Initial | 10 minutes | 5 minutes | 3 minutes |
| Final | 45 minutes | 20minutes | 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-D3 UG and its variations 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 in accordance with the ACI 506 “Guide to Shotcrete” publication.
OPTIMUM PERFORMANCE
- 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 in-place 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.