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Properties of 33, 43 and 53 grades of Ordinary Portland Cement such as fineness, setting times, soundness, expansion, compressive strength based on Indian, American and Eurocodes.

Ordinary Portland Cement(OPC) is the most widely used cement in the world for producing concrete, mortar, stucco, and non-specialty grouts. Ordinary Portland Cement has 3 grades based on its strength namely 33, 43 and 53 grade that indicates the compressive strength obtained after 28 days of setting.

In this article, we discuss the difference between different type of ordinary Portland cement as per Indian Standards, American Standards and European Standards.

As per Indian Standards

Indian Standard Codes
Grade 33 Grade 43 Grade 53 Grade
Properties
Chemical Properties
Ratio of percentage of lime to percentages of silica, alumina and iron oxide Not greater than 1.02 and not less than 0.66 Not greater than 1.02 and not less than 0.66 Not greater than 1.02 and not less than 0.8
Ratio of percentage of alumina to percentage of iron oxide Not less than 0.66 Not less than 0.66 Not less than 0.66
Insoluble residue, percent by mass Not more than 4 Not more than 2 Not more than 2
Magnesia, percent by mass Not more than 6 Not more than 6 Not more than 6
Total Sulphur content calculated as Sulphuric anhydride (SO2), percent by mass
(a) When tricalcium aluminate is less than or equal to 5 Not more than 2.5 Not more than 2.5 Not more than 2.5
(b) When tricalcium aluminate is greater than 5 Not more than 3 Not more than 3 Not more than 3
Total loss on ignition, percent by mass, Max Not more than 5 % Not more than 5 % Not more than 5 %
Chloride content, percent by mass, Max Not more than 0.1 % Not more than 0.1 % Not more than 0.1 %
Alkali content Not more than 0.05 Not more than 0.05 Not more than 0.05
Physical Properties
Setting Time 3 days 7 Days 28 Days 3 days 7 Days 28 Days 3 days 7 Days 28 Days
Avg. Compressive Strength in N/mm^2 16 22 33 23 33 43 27 37 53
Fineness in m^2 /kg, Min. 225 225 225
Soundness
a) By Le Chatelier method, mm, Max 10 10 10
b) By autoclave test method, percent, Max 0.8 0.8 0.8
Setting time
a) Initial in minutes, Min 30 30 30
b) Final in minutes, Max 600 600 600
Other Information
Code Reference IS Code – IS 269 : 1989 IS Code – IS 8112: 1989 IS Code – IS 12269 : 1987

As per American Standards

American Standard – ASTM C 150
Types Type I Type I A Type II Type II A Type III Type III A Type IV Type V
Properties
Air Content of Mortar                
a) All cements 12% 12% 12% 12% 12% 12% 12% 12%
b) Air-Entraining Cement 16% – 22% 16% – 22% 16% – 22% 16% – 22% 16% – 22% 16% – 22% 16% – 22% 16% – 22%
Fineness                
a) Turbidimeter test in m²/kg 160 160 160 – 240 160 – 240 160 – 240 160
b) Air Permeability 280 280 280-420 280-420 280-420 280
Soundness 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80% 0.80%
Setting Time in min                
Initial Time Not less than 45 Not less than 45 Not less than 45 Not less than 45 Not less than 45 Not less than 45 Not less than 45 Not less than 45
Final Time Not more than 375 Not more than 375 Not more than 375 Not more than 375 Not more than 375 Not more than 375 Not more than 375 Not more than 375
Compressive Strength in Mpa                
1 Day 12 10
3 Day 12 10 10 8 24 19 8
7 Day 19 16 17 14 7 15
28 Day 17 21

As per European Standards

European Standard – EN-197-1
Types Class 32.5 Class 42.5 Class 52.5
Properties
Compressive Strength in MPa      
2 Days 10 20 20 -30
7 Days Greater than 16    
28 Days 32.5 -52.5 42.5 – 62.5 Greater than  52.5
Initial Setting Time Greater than 75 Greater than 60 Greater than 45
Soundness 10mm 10mm 10mm

Uses of Different Type of Ordinary Portland Cement

As per Indian Codes

1. 33 Grade Cement

This grade of cement is used for general construction under normal environmental condition. But low compressive strength and availability of higher grades of cement have impacted the use and demand of OPC 33.

2. 43 Grade Cement

OPC 43 is used for general RCC construction where the grade of concrete is up to M30. It is also used for the construction of precast items such as blocks, tiles, asbestos products like sheets and pipes, and for non-structural works such as plastering, flooring, etc.

3. 53 Grade Cement

OPC 53 is used when we need higher strength concrete at very economical cement content. This cement grade is used for specialized works such as prestressed concrete components, precast items such as paving blocks, building blocks, etc, runways, concrete roads, bridges, and other RCC works where the grade of concrete is M25 and above.

As per American Standards

Type IFor use when the special properties specified for any other type are not required.
Type IAAir-entraining cement for the same uses as Type I, where air-entrainment is desired.
Type IIFor general use, more especially when moderate sulfate resistance or moderate heat of hydration is desired.
Type IIAAir-entraining cement for the same uses as Type II, where air-entrainment is desired.
Type IIIFor use when high early strength is desired.
Type IIIAAir-entraining cement for the same use as Type III, where air-entrainment is desired.
Type IVFor use when a low heat of hydration is desired.
Type VFor use when high sulfate resistance is desired.

Read More: Ordinary Portland Cement – Constituents, Properties, Types and Uses

Gopal Mishra

Gopal Mishra

Gopal Mishra is a Civil Engineer from NIT Calicut and has more than 10 years of experience in Civil Engineering and Construction. He is the founder of The Constructor.

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3 Comments

  1. I am looking for a formulation for a rapid setting anchoring cement which can be produced in South Africa and suitable for fixing machines to concrete floors, shelving to concrete floors, etc. I am trying to source raw materials that are available locally if possible.

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