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DRY PROCESS SHOTCRETE

For Phneumatically Applied Dry Process Shotcrete Applications
ACI Gradation 1 (DP-01), ACI Gradation 2 (DP-02) and ACI Gradation 3 (DP-03)

SUPERIOR BOND. FAST SETTING.

SPEC MIX® Dry Process Shotcrete is a preblended pneumatically applied concrete designed for dry process shotcrete applications. SPEC MIX Dry Process Shotcrete formulations come in ACI gradation 1 (DP-01) and gradation 2 (DP-02 & DP-03) to allow the applicator the ability to select a product specifically designed with an aggregate gradation formulated for the depth of the application.

SPEC MIX Dry Process Shotcrete products are suited for but not limited to the repair of bridges, parking structures, dams, or any concrete structure as well as use for new construction projects including tunnels, shaft linings, soil nailing, pools and concrete structures.

SPEC MIX Dry Process Shotcrete is produced under strict manufacturing standards supported by complete quality control measures that are assigned to each batch. A digital printout displaying the proper proportions per batch may be kept as a permanent record. SPEC MIX shotcrete products are designed to meet applicable shotcrete ASTM and ACI standards.

Product Features

• Specifically formulated for enhanced shooting characteristics and physical performance making this product ideal for pneumatically applied concrete applications
• Formulations come in ACI gradation 1 (DP-01) and gradation 2 (DP-02 & DP-03) to allow the applicator the ability to select a product specifically designed with an aggregate gradation formulated for the depth of the application
• Suited for, but not limited to, the repair of bridges, parking structures, dams, or any concrete structure
• Available in 80 lb (36.2 kg) and 3,000 lb (1,360.7) bulk bag, SPEC MIX Dry Process Shotcrete is engineered for optimal adhesion and durability

Dry Process Typical Field Data
Compressive Strength (ASTM C 42)DP-01DP-02DP-03
1-Day2,200 PSI (15.1 MPa)2,500 PSI (17.2 MPa)3,000 PSI (20.6 MPa)
3-Day4,000 PSI (27.5 MPa)4,250 PSI (29.3 MPa)4,500 PSI (31.0 MPa)
7-Day5,000 PSI (34.4 MPa)5,500 PSI (37.9 MPa)5,750 PSI (39.6 MPa)
28-Day6,000 PSI (41.3 MPa)7,000 PSI (48.2 MPa)7,500 PSI (51.7 MPa)
Min Flexural Strength (ASTM C 78)
28-Day900 PSI (6.2 MPa)900 PSI (6.2 MPa)900 PSI (6.2 MPa)
Rapid Chloride Permeability (ASTM C 1202)700 COULOMBS700 COULOMBS700 COULOMBS
Rapid Freeze/Thaw (ASTM C 666) Durability Factor909090
Actual results may vary due to workmanship, regional material variations, and jobsite conditions.

TYPICAL AGGREGATE GRADATION DATA

Aggregate gradation plays a crucial role in the performance of shotcrete. SPEC MIX Shotcrete products are designed to meet ACI 506R gradation 1 or 2.

SPEC MIX Dry Process Shotcrete Installation/Application

Thoroughly tested and trialed by certified nozzlemen, SPEC MIX Dry Process Shotcrete is a dry
concrete product designed for dry process shotcrete applications. SPEC MIX shotcrete should be installed in accordance with the provisions of the national or local building code and The American Concrete Institute’s recommended practices ACI, “Guide to Shotcrete”. Shotcrete products should be applied only by an experienced, certified nozzleman.

Substrate preparation is critical for promoting good bond. When applying shotcrete materials to concrete surfaces, any deteriorated concrete should be removed until sound concrete is exposed. The exposed surface should be free of loose and/or friable material, and dust. When combining water with the shotcrete mixture, use clean, potable water.

SPEC MIX Dry Process Shotcrete materials should be pneumatically installed. Hot and/ or dry conditions may cause the shotcrete to harden more rapidly; therefore, a fog mist may be required to ensure proper curing. Prior to the application of shotcrete, the substrate should be cleaned and evenly moistened, but not saturated.

Although SPEC MIX shotcrete products are designed to reduce rebound, some rebound is to be expected. Do not incorporate rebound material back into the applied shotcrete. Once the shotcrete is applied, a variety of finishing techniques can be used to achieve the desired surface texture. Some applications may require a finish (flash) coat. After the desired finish is achieved, provide sufficient moisture to permit continuous hydration of the cementitious materials for optimum curing.


Sizes and Equipment

SPEC MIX shotcrete products are available in 80 lb (36.2 kg) packages for easy hand loading, or in 3,000 lb (1,360.7 kg) reusable bulk bags to be used with the various SPEC MIX silo systems. When using the silo system, once the bulk bags of shotcrete mix are delivered to the project site, the portable silo is loaded with a job site forklift and the product is dispensed into the shotcrete machine as needed.