Ramco Infra Super OPC 53 Grade is a high-performance Portland cement designed for special concrete requirements; mining, clinkerisation and process parameters are controlled to give a cement that needs optimal chemical admixture for the desired rheology. It gains strength faster, allowing higher replacement with Supplementary Cementitious Materials (SCMs), higher workability and retention at optimum admixture dosage, and lower cement content for a given concrete grade. It is compatible with all PCE admixtures and is shown for metro rail projects, metro tunnels and airports.

Key features

• Can replace cement with a higher percentage of Supplementary Cementitious Materials (SCMs)
• Improves speed of construction through faster strength gain
• Higher workability with optimum admixture content
• Economises cement content for a given concrete grade
• Lower infra cost
• Higher workability and retention with optimum admixture content
• Compatible with all PCE admixtures

Applications

• Metro rail projects
• Metro tunnels
• Airports
• Bridges and flyovers
• High early strength precast concrete (M50)

Specifications

Specific Gravity: 3.14 (IS 269:2015 requirement: NA) | Specific Surface Area: 315 m2/kg (IS 269:2015: min 225 m2/kg) | Normal Consistency: 24-25 % (IS 269:2015: not specified) | Initial Setting Time: 75-100 min (IS 269:2015: not less than 30 min) | Final Setting Time: 170-230 min (IS 269:2015: not more than 600 min) | Compressive Strength (1 day): 25-30 N/mm2 (IS 269:2015: not specified) | Compressive Strength (3 days): 39-44 N/mm2 (IS 269:2015: min 27 N/mm2) | Compressive Strength (7 days): 49-53 N/mm2 (IS 269:2015: min 37 N/mm2) | Compressive Strength (28 days): 65-67 N/mm2 (IS 269:2015: min 53 N/mm2) | Cement Mortar Strength (1 / 3 / 7 / 28 day): 27 / 40 / 52 / 66 N/mm2 (others: 21 / 31 / 39.5 / 56.7 N/mm2) | M50 Precast Concrete Strength (12 hr / 24 hr): 23.6 / 45.0 N/mm2 (NABL laboratory) | Admixture Requirement - Mid PCE: 0.60% (others 0.90%) for M55 and M60 concrete, slump 150 +/- 20 mm, retention up to 3 hours (NABL laboratory) | Admixture Requirement - High PCE: 0.25% (others 0.50%) for M55 and M60 concrete, slump 150 +/- 20 mm, retention up to 3 hours (NABL laboratory)

Standards: IS 269:2015