Materials Dry process shotcrete: single-component, micro silica-fortified, cement- based shotcrete, containing Portland cement, micro silica, and graded specialty aggregates. Comply with the following: Manufacturer: Shotcrete MS (1229-80), Shotcrete MS – Steel Fiber Reinforced (1229-87), Shotcrete MS – AR Glass Fiber Reinforced (1229-83). Performance and Physical Properties at 73 degrees F (23 degrees C) and 50 percent relative humidity. 8. Shotcrete MS Application: Dry process Shotcrete (Shotcrete MS complying with ASTM C 1480 Type FA, Grades GU, SR and LP. Compressive Strength. Minimum laboratory test results ASTM C 109: 1750 psi (12.1 MPa) @ 24 hours, 3500 psi (24.1 MPa) @ 7 days and 5500 psi (37.9 MPa) @ 28 days. Typical field test results ASTM C 42: 3200 psi (22.0 MPa) @ 24 hours, 6900 psi (47.5 MPa) @ 7 days and 9000 psi (62 MPa) @ 28 days. Slant Shear bond Strength ASTM C 882: 1100 psi (7.6 MPA) @ 7 days, 2200 psi (15.2 MPa) @ 28 days. Flexural Strength ASTM C78: Minimum laboratory results: 600 psi @ 7 days (4.1 MPa), 700 psi (4.8 MPa) @ 28 days. Typical Field Results: 900 psi @ 7 days (6.2 MPa), 1100 psi (7.6 MPa) @ 28 days. Rapid Chloride Permeability, ASTM C 1202: < 500 coulombs (very low). Sulfate Expansion ASTM C 1012: <0.05% @ 180 days, <0.1% @ 1 year. 9. Shotcrete MS – Steel Fiber Reinforced Application: Dry Process Shotcrete (Shotcrete MS complying with ASTM C 1480 Type FA, Grades GU, SR, LP, FR Class II. Compressive Strength. Minimum laboratory test results ASTM C 109: 2500 psi (17.2 MPa) @ 24 hours, 4000 psi (27.6 MPa) @ 7 days and 7000 psi (48.3 MPa) @ 28 days. Typical field test results ASTM C 42: 3750 psi (25.9 MPa) @ 24 hours, 6900 psi (47.5 MPa) @ 7 days and 10500 psi (72.4 MPa) @ 28 days. Slant Shear Bond Strength ASTM C 882: 1100 psi (7.6 MPA) @ 7 days, 2200 psi (15.2 MPa) @ 28 days.
