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Ordinary Portland Cement - 53 Grade The Cost Effective Way to Speedy Construction

53 Grade Cement is a prime brand cement with a remarkably high C3S(Tri Calcium Silicate) providing long-lasting durability to concrete structures.

ADVANTAGES

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Gives more flexibility to architects and engineers to design sleeker and economical sections.

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Develops high early strength so that form work of slabs and beams can be removed much earlier resulting in faster speed of construction and saving in centering cost.

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Produces highly durable and sound concrete due to very low percentage of alkalis, chlorides, magnesia and free lime in its composition.

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Almost a negligible chloride content results in restraining corrosion of concrete structure in hostile environment.

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Significant saving in cement consumption while making concrete of grades M15, M20 & M25 and pre-cast segments due to high early strength.

IDEAL APPLICATIONS

»    High-rise Buildings, Residential, Commercial & Industrial Complexes
»    Roads, runways, bridges and flyovers.
»    Defense Constructions
»    For heavy defense structures like Bunkers
»    Pre-stressed concrete structures

 BIS SPECIFICATIONS AND SDCC NORMS OF 53 GRADE OPC

Sr.No.

Description

Unit

Req. as per IS-
12269- 1987

SDCC Norms

A) CHEMICAL COMPOSITION
1. Insoluble Residues(IR) % 3.0 Max 2.0 Max.
2. Magnesium Oxide(MgO) % 6.0 Max 2.5 Max.
3. Sulphuric Anhydride(SO3) % 2.5 Max when C3A<5 & 3.0 Max when C3A>5 2.75 Max.
4. Loss on Ignition(LOI) % 4.0 Max 3 Max.
5. Lime Saturation Factor (LSF) % 0.80-1.02 0.90Min.
6. Alumina Iron ratio (A/F) % 0.66 Min. 1.10 Min.
7. Chloride (CI-) % 0.10 Max. 0.05 Max
B) PHYSICAL PROPERTIES
1. Specific Surface m2/kg 225 Min. 280 Min.
2. Soundness (Expansion)  
  a) By Le-Chatelier mm 10.0 Max. 3.0 Max.
b) By Autoclave % 0.8 Max. 0.2 Max
3. Setting Time  
  a) Initial Set Minute 30 Min. 70 Min.
b) Final Set Minute 600 Max. 250 Max.
4. Compressive Strength  
  a) 3 days MPa 27 Min. 35 Min.
b) 7 days MPa 37 Min. 45 Min.
c) 28 days MPa 53 Min. 58 Min.