What Is the Grade of Cement?
According to Indian Standards, it is classified into three types of Cement Grades, OPC 33 Grade, OPC 43 Grade, OPC 53 Grade cement. Cement acts as a bonding agent for concrete components in building materials, which is widely used in the construction industry in the modern era.
Cement is available in different grades for different functions. The strength of the concrete mix varies according to the type of cement grade. Therefore, the grade of cement used should be known so that the desired strength can be obtained as per the requirement.
Here is the detailed information about the grade of cement. There are generally three grades of utility-based cement available in the market. These include cement in 33rd grade, 43rd grade and 53rd grade.
Different grades of cement vary depending on the strength of the cement. The strength of cement of different grades of cement is determined on the basis of compressive strength.
The strength of cement is tested by making standard cubes. Proper curing is done for 28 days. A proper curing process controls the rate of hydration of the cement. Therefore, the total compressive strength of cement can be obtained through the proper curing process. Compressive strength result is usually calculated in megapascals (MPa) or N/mm2.
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Types of Cement Grades
What IS Grade 33 Cement?
This types of cement grades yields 33N/mm2 after 28 days of compressive test of cement. The test is performed in accordance with Indian standards under standard conditions
Grade 33 of cement is used for general construction work. It is not used for the strength of concrete above M20. The use of 33-grade cement has declined due to the high-grade utility in cement. Nowadays, grade 33 cement is used in plaster and masonry mortars.
What Is Grade 43 Cement?
This types of cement grades has a compressive strength of 43N/mm2 after 28 days. The test is performed in accordance with Indian standards under standard conditions.
The use of grade 43 cement is suitable for construction with a strength of concrete mix up to M30. Grade 43 cement can be used in precast unit units, blocks, pipes, tiles etc.
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What Is Grade 53 Cement?
This types of cement grades gives a compressive test result of 53 N/mm2 after 28 days. Grade 53 cement is tested under standard conditions as per Indian standards. The setting time of 53-grade cement is less than that of 43-grade cement.
This types of cement grades is mostly used for structural purposes of high rise buildings. The use of 53-grade cement is suitable for making concrete above M25. It is mainly used in prestressed concrete.
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Difference Between 33, 43 and 53 Grade of Cement
1. Grade of Cement: Initial strength
- The initial strength of 53-grade cement is found to be higher than 33 grade and 43 grade.
- As the strength of grade 53-grade cement is found in the initial stage, its strength does not increase after 28 days. Grade 33 and grade 43 types of cement continue to increase in strength for one year after 28 days.
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2. Grade of Cement: Heat of Hydration
- 53-grade cement releases heat in the process of the heat of hydration at a much faster rate than 33 and 43-grade cement.
- Therefore, the possibility of micro-cracks on the surface of concrete made of 53-grade cement is very high.
- 53-grade cement has higher strength and durability than 33-grade cement and 43-grade cement. But it creates fine cracks on the concrete surface.
- 43-grade cement releases moderate heat during the process of the heat of hydration. 33-grade cement produces low heat during the process of the heat of hydration.
- The use of 53-grade cement generates a lot of heat of hydration during the setting of concrete. Therefore, it is taken care of by curing.
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3. Grade of Cement: IS Codes
- IS 269 code is used for Concrete of For 33 grade Cement.
- IS 4312 Code is used for Concrete of For 43 Grade Cement.
- IS 12269 code is used for Concrete of For 53 Grade Cement.
4. Grade of Cement: Compressive strength
- To calculate the compressive strength of cement, it is necessary to mix sand and water in the cement and pour it into a standard mould.
- The cube casting done in this way is tested in the laboratory at a temperature of 27 ° C after 3 days, 7 days and 28 days of curing.
- The classification of compressive strength of cement after 3 days, 7 days and 28 days is as follows,
5. Grade Cement: Price
- The price of a 33-grade type of cement is lower than that of 43-grade cement and 53-grade cement.
- The price of 43-grade type cement is higher than that of 33-grade cement but lower than that of 53-grade cement.
- The price of 53-grade cement is higher than that of 33-grade cement and 43-grade cement.
6. Uses of Cement Grade: 33 Grade Cement
- 33 Grade Cement is widely used for plaster in ordinary houses.
- In addition, 33-grade cement is used for wall and tiling work.
- Generally, 33-grade cement can be made for PCC. Which can be done in work with low compressive strength.
Uses of Cement Grade: 43 Grade Cement
- 43-grade cement is used for ready mix concrete.
- Up to m30 grade in building 43-grade cement can be used for PCC and RCC work.
- In addition, 43 grade cement can be used for the construction of silos and chimneys.
- 43-grade cement is used in the concrete of buildings, bridges, roads and retaining wall structures.
- 43-grade cement can be used in making precast items (blocks, tiles, sheets, pipes, etc.) and in prestressed concrete.
- Grade 43 cement can be used in asbestos products to make sheets and pipes.
- 43-grade cement can be used in non-structural works like plastering, flooring etc.
Uses of Cement Grade: 53 Grade Cement
- 53-grade cement is used to make high strength railway sleepers.
- In addition, 53-grade cement can be used in pre-stressed girders.
- Can be used in the heavy structure of industrial buildings, in the road with runway area and in bridges
Conclusion
- 53-grade cement can be used to get high strength in the time of new technology.
- 33-grade cement and 43-grade cement can be used in the production of various concrete in some industrial units.
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Frequently Asked Questions (FAQ)
Types of Cement Grades
According to Indian Standards, it is classified into three types of Cement Grades,
1. OPC 33 Cement Grade, 2. OPC 43 Cement Grade, 3. OPC 53 Cement Grade.
What Does 33 43 and 53 Grades of Cement Mean?
By the grade of cement as 33/43/53, the values 33/43/53 indicate the compressive strength of cement cube in Mpa (N/mm2) after 28 days of curing, where cement mould size is 7.06 cm*7.06 cm*7.06 cm.
What Is Meant by 53 Grade Cement?
OPC 53 means, It gives compressive strength of 53 N/mm when it is tested for compressive strength as per Indian standard guidelines. 53 Grade Cement. OPC 53 grade cement has better quality, strength, and less setting time compared to 33 and 43 grades of cement.
Which Grade of Cement Is Best for Plastering?
This grade of cement has high workability and is mainly used for masonry work and for plastering work. 2 The initial strength of 33 Grade Cement continues to gain even after 28 days. 3 The heat of hydration of 33 Grade Cement is lower as compared to the 43 grade and 53-grade cement.