King® MS-D3 UG
HIGH EARLY SHOTCRETE MATERIAL FOR DRY-MIX PROCESS FOR UNDERGROUND APPLICATIONS
King® MS-D3 UG 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.
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
- Synthetic fibres reduce cracking caused by intrinsic stresses
- Type III synthetic fibre in accordance with ASTM C1116
- Grade FR Class I shotcrete in accordance with ASTM C1480
- 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 fibres
- 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
- Significantly increased load-carrying capacity
- Significantly increased energy absorbing capacity (toughness)
- Significantly increased impact resistance
- Reduction of cracking due to drying shrinkage
- 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 fibre, 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 fibre, a level 2 dosage of accelerator and a Gradation No. 2, the name of the product would be King® MS-D3 UG2 MFB.
Packaging
- 30 kg (66 lb) bags
- 1000 kg (2 205 lb) FIBC
- Products containing macro-synthetic fibres (MF) or steel fibres (ST) can only be packaged in bulk bags (FIBC).
*Custom packaging is available to suit specific project requirements
Product Details
APPROVALS / CERTIFICATES
GRADATION
- By default King® MS-D3 UG, King® MS-D3 UG ST andKing® MS-D3 UG MF areblended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 2
- King® MS-D3 UG G1, King® MS-D3 UG ST G1 and King® MS-D3 UG MF G1 is blended to meet ACI 506 “Guide to Shotcrete”, Table 1.1, Gradation No. 1
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 may be adversely affected 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.
Compressive Strength
| ASTM C 116(MODIFIED) |
| King® MS-D3 UG | King® MS-D3 UG2 | King® MS-D3 UG3 | |
| 4 hours | - | 2 MPa (290 psi) | 7 MPa (1015 psi) |
| 8 hours | 7 MPa (1015 psi) | 8 MPa (1150 psi) | 10 MPa (1500 psi) |
| 12 hours | 10 MPa (1500 psi) | 12 MPa (1750 psi) | 14 MPa (2030 psi) |
| ASTM C 1604 |
| King® MS-D3 UG | King® MS-D3 UG2 | King® MS-D3 UG3 | |
| 1 day | 21 MPa (3000 psi) | 25 Mpa (3625 psi) | 25 MPa (3625 psi) |
| 3 days | 30 MPa (4350 psi) | 30 Mpa (5075 psi) | 30 MPa (5075 psi) |
| 7 days | 35 MPa (5075 psi) | 35 MPa (5075 psi) | 35 MPa (5075 psi) |
| 28 days | 42 MPa (6000 psi) | 42 MPa (6000 psi) | 42 MPa (6000 psi) |
Tensile Strength in Flexure
| ASTM C 78 |
| 28 Days | 6.8 MPa (985 psi) |
| King® MS-D3 UG MF and King® MS-D3 UG ST |
| 28 Days | 8.0 MPa (1160 psi) |
Porosity
BOILED ABSORPTION
| 6.0% | ASTM C 642 |
MAXIMUM VOLUME OF PERMEABILITY VOIDS
| 14.0% | ASTM C 642 |
Application
Setting Time
| 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 |
Yield
- Approx. 0.014 m3 (0.5 ft3) / 30 kg (66 lb) bag
- Approx. 0.45 m3 (16.5 ft3) / 1000 kg (2 205 lb) bag
* Yield in service may slightly vary according to projects conditions
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 5 °C (40 °F).
CURING TREATMENT
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”.
CLEAN UP
Clean all tools and equipment after use with water. Once hardened, the product can only be removed mechanically.
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