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Ordinary Portland Cement - 43 Grade Durable Construction For Generation

43 Grade Cement is the popular Brand Cement with low heat of hydration and long life of Concrete Structures.

ADVANTAGES

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Develops early strength at 3 and 7 days with exceptionally high 28 days strength. Form work of slabs and beams can be removed much earlier which results in increased speed of construction.

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Unbeatable consistency in quality gives better accountability for mix design

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The higher characteristics strength of concrete leads to higher bond strength minimizing the possibility of slippage of reinforcements.

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The dense and least permeable concrete prevents leakage / seepage problems.

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Its high fineness offers better workability for a given water cement ratio ensuring very dense, compact and durable concrete.

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Being the low alkali cement it provides insurance against alkali-aggregate reaction, this results in durable structures.

IDEAL APPLICATIONS

»    Residential and commercial complex.
»    PCC solid and hollow blocks
»    Defense Constructions
»    Airport-Runways
»    Cement tanks
»    Asbestos cement products
»    Concrete roads and Ferro-cement concrete elements

 BIS SPECIFICATIONS AND SDCC NORMS OF 43 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) % 5.0 Max 3.5 Max.
5. Lime Saturation Factor (LSF) % 0.66-1.02 0.89Min.
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 23 Min. 32 Min.
b) 7 days MPa 33 Min. 42 Min.
c) 28 days MPa 43 Min. 55 Min.