What does '53 Grade' signify?

It indicates that the minimum compressive strength of standard cement-sand mortar cubes is 53 MPa (N/mm²) after 28 days of curing, as per Table 2.

What is the minimum initial setting time for this cement?

The minimum initial setting time is 30 minutes, as specified in Table 2.

What is the maximum final setting time?

The maximum final setting time is 600 minutes (10 hours), as specified in Table 2.

Is IS 12269 cement suitable for plastering?

While technically usable, it's not ideal. Its high strength can lead to shrinkage cracks in plaster. Lower strength cements like OPC 33 or 43 Grade (IS 269) are generally preferred for plastering.

IS 12269

: 2013

Ordinary Portland Cement, 53 Grade - Specification

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This standard specifies the manufacturing process, chemical composition, and physical property requirements for 53 Grade Ordinary Portland Cement (OPC). It is a high-strength cement used in applications requiring high early strength and ultimate strength, such as precast concrete, high-rise buildings, and infrastructure projects.

Specifies requirements for 53 grade ordinary Portland cement, covering chemical and physical characteristics and testing procedures.

Quick Reference Values

Minimum 3-day compressive strength27 MPa

Minimum 7-day compressive strength37 MPa

Minimum 28-day compressive strength53 MPa

Minimum initial setting time30 minutes

Maximum final setting time600 minutes

Maximum soundness by Le Chatelier method10 mm

Maximum soundness by Autoclave method0.8 %

Minimum specific surface (fineness)225 m²/kg

Practical Notes

Due to its higher heat of hydration, 53 Grade OPC is generally not recommended for mass concreting (e.g., dams, large foundations) to avoid thermal cracking.

The high early strength gain allows for faster construction cycles and earlier removal of formwork, subject to engineering approval.

Achieving the designated 53 MPa strength in concrete is heavily dependent on the quality of aggregates, water-cement ratio, workmanship, and adequate curing.