The cement grades indicate how much cement has a rolling resistance. The strength of the cement (Compressive strength) was generally measured after 28 days with adequate curing.

Proper curing is very important because curing controls the rate of hydration of the cement, so proper curing is very important to obtain the total compressive strength of the cement.

**Ordinary Portland cement** has 3 **grades 33, 43, and 53**. According to the Bureau of **Indian Standard**, these grades are differentiated by their compressive strengths and expressed in megapascals (Mpa), which is N / mm^{2}.

Compressive strength is a proportion of load per unit area. The load is calculated in newton (N), and the area is calculated in mm^{2}. The** differences between 33, 43, and 53 grades** cement are as follows:

Generally, three different types of cement are used, which are,

**Grade-33**Cement.**Grade-43 Cement.****Grade-53 Cement.**

Also, read: Difference Between M25 and M30 Concrete | What Is M25 Grade | What Is M30 Grade

Important Point

**What IS Grade 33 Cement?**

**What IS Grade 33 Cement?**

Grade 33 Portland cement shows its high workability compared to other grades. In plaster and masonry mortars, grade 33 was commonly used.

Fineness = 300 kg/m^{2}

**Crush strength 3 days later = 16 N/mm ^{2} after 7 days later, force = 22 N/mm^{2} after 28 days later, force = 33 N/mm^{2}**

**What Is Grade 43 Cement?**

**What Is Grade 43 Cement?**

Portland Grade 43 cement was generally used in the construction of reinforced concrete, also called R.C.C. Class 43 is also used in R.M.C, which is also called pre-mixed concrete and is also used in precast concrete for construction purposes.

The fineness will be = 225 kg/m^{2}

**Crush resistance 3 days later = 23 N/mm ^{2} after 7 days later, force = 33 N/mm^{2} after 28 days later, force = 43 N/mm^{2}**

Grade 43 cement has a good ability to resist sulfate, and grade 43 has a low chloride content. Class 43 cement has a good working capacity, and, using this class, we obtain a good and smooth exit surface.

Also, read: Cinder Block Vs Concrete Block | What Is Cinder Blocks | What Is Concrete Blocks

**What Is Grade 53 Cement?**

**What Is Grade 53 Cement?**

In grade 53, Portland cement, low chloride content was present, and grade 53 cement has a good ability to resist sulfate.

The amount of cement is required in a smaller volume because this grade has high strength as compared to other grades of Portland cement.

Grade 53 cement is mainly used in:

- Construction of Bridges.
- Construction of precast civil construction.
- Construction of factories, construction of buildings, etc. (Strength required for buildings).
- Construction of concrete sleeper (for railways).

**The fineness of grade 53 will be = 225 kg/m ^{2} Crush resistance 3 days later = 27 N/mm^{2} after 7 days, force = 37 N/mm^{2}**

After 28 days, force = 53 N/mm^{2}

Grade 53 cement has high strength after 28 days after proper curing. Without proper healing, strength is not achieved properly.

Also, read: What Is Slump Cone Test | Principle of Slump Test | Types of Concrete Slump

## Difference Between 33, 43 and 53 Grade Cement

**1. ****Grade of Cement: ****IS Codes**

**1.**

**Grade of Cement:**

**IS Codes**

**For 33 grade IS 269 is used****For 43 grade IS 8112 is used****For 53 grade IS 12269 is used**

**2. ****Grade of Cement: ****Compressive strength**

**2.**

**Grade of Cement:**

**Compressive strength**

For calculating the compressive strength, sand and water from the cement are mixed, vibrated and cured, and cubes are made.

These cubes are tested in the** laboratory at 27 ° C after 3 days, 7, and 28 days. The cement classification indicates the compressive strength of the concrete after 28 days of laying.**

Sr. No. |
Grade of Cement |
Compressive Strength in 3 days |
Compressive Strength in 7 days |
Compressive Strength in 28 days |

1 | 33 grade | 16 N/mm^{2} |
23 N/mm^{2} |
27 N/mm^{2} |

2 | 43 grade | 22 N/mm^{2} |
33 N/mm^{2} |
37 N/mm^{2} |

3 | 53 grade | 33 N/mm^{2} |
43 N/mm^{2} |
53 N/mm^{2} |

Also, read: What Is Cover in Concrete | Clear Cover in Beams, Slab, Column, Footing

**3. ****Grade of Cement: ****Initial strength**

**3.**

**Grade of Cement:**

**Initial strength**

Here you can see that the initial strength of cement 53 is greater than 33grde or 43.

The strength of** grade 53 does not increase much after 28 days due to the initial strength gain, while grade 33 and 43 cement continues to gain strength after 28 days.**

Over time, 33 and 43-grade cement will achieve the same maximum strength as 53-grade cement.

**4. Grade of Cement: ****Heat of Hydration**

**4. Grade of Cement:**

**Heat of Hydration**

During the initial setup, the 53-grade cement releases heat of **hydration at a much faster rate compared to the 33 and 43 cement.**

Therefore, the chances of microcracks are much greater; these micro-cracks may not be visible on the surface. Often, site supervisors or masons increase the amount of cement in the mix.

They think this will increase the strength and durability of the concrete. But it creates micro-cracks in the concrete.

Therefore,** grade 53 cement should only be used where such applications justify** the manufacture of concrete with greater strength, where there are good supervision and quality assurance measures and where appropriate precautions are taken to reduce the greatest heat of hydration through an appropriate healing process.

The **43-grade cement releases medium** heat of hydration. The **33-grade cement releases low heat of hydration**.

Also, read: Quality Testing of Sand for Concrete | Quality Testing of Sand for Construction | Type of Sand Test

**5. Price of Grade Cement **

**5. Price of Grade Cement**

- The price of 33-grade
**cement is lower than 43-grade cement.** - The 43-grade cement
**price is higher than 33 but lower than 53.** - The price of
**cement 53 is higher than 33 and 43.**

**6. Uses of Cement Grade**

**6. Uses of Cement Grade**

Currently,** 33-grade cement is rarely** used. As most manufacturers have adopted **PPC. 33-grade cement** is commonly used to manufacture low strength concrete, as **below M20 concrete**.

43-grade cement is used in PCC and RCC works, preferably where the concrete grade is up to M30.

It is also recommended for plastering, tiles, masonry and stone masonry, flooring, path, etc., where the initial days are strong, and not of primary importance.

It is also used to finish all types of buildings, bridges, culverts, roads, water retention structures, etc.

Grade 53 OPC cement is recommended in all RCC structures, such as feet, columns, beams, and slabs, where initial and final strength is the main structural requirement. Can also be used for RCC jobs where the concrete grade is M30 and above

**Building – Activity,**

**A precast concrete item, such as paving blocks, tiles, building blocks, pipes, sleepers, masts, etc.****Work in prestressed concrete, such as bridges, silos, etc.****Track, concrete roads, bridges.****Concreting for cold weather, cement grout, instant clogging, etc.**

Every type of cement is suitable for a different set of tasks. Each of them has a variable level of resistance, the use of incorrect resistance levels for a specific job can affect your overall structural design.

### 53 Grade Cement

OPC **53 Grade cement** is required to conform to BIS specification IS:12269-1987 with a designed strength for 28 days being a minimum of **53** MPa or 530 kg/cm^{2}. **53 Grade** OPC provides high strength and durability to structures because of its optimum particle size distribution and superior crystallized structure.

### Difference Between 33 43 53 Grade Cement

The strength of **53 grade** does not increase much after 28 days because of early strength gain. While **33 grade** and **43**–**grade cement** continue to gain strength after 28 days. With time **33** and **43**–**grade cement** will attain the same ultimate strength as that of **53**–**grade cement.**

### Cement Grades

Generally, there are three types of cement grades; **33-grade, 43-grade, and 53-grade**. Read on to know more about these types of cement that will help you decide on need.

### Cement Grading

The strength gets further measured as the comprehensive strength, which is the moulded cement in the standard cube. After 28 days of curing, it gets estimated. The measurements are in Mega-Pascal or N/mm. Generally, there are three types of cement grades; **33-grade, 43-grade, and 53-grade.**

### 53 Grade Cement

OPC 53 Grade cement is required to conform to BIS specification IS:12269-1987 with a **designed strength for 28 days** being a minimum of 53 MPa or 530 kg/cm^{2}. 53 Grade OPC provides high strength and durability to structures because of its optimum particle size distribution and superior crystallized structure.

### Is Cement a Plaster?

Cement plaster is **a mixture of suitable plaster, sand, Portland cement and water** which is normally applied to masonry interiors and exteriors to achieve a smooth surface. Walls constructed with stock bricks are normally plastered while face brick walls are not plastered.

### OPC 53 Grade Cement

OPC 53 Grade cement is required to conform to BIS specification IS:12269-1987 with a **designed strength for 28 days being** a minimum of 53 MPa or 530 kg/cm^{2}. 53 Grade OPC provides high strength and durability to structures because of its optimum particle size distribution and superior crystallized structure.

### 33 Grade Cement, 43 Grade Cement and 53 Grade Cement Price.

Cement Grade |
Min Price |
Max Price |

Grade 33 | Rs 270/Bag | Rs 370/Bag |

Grade 43 | Rs 280/Bag | Rs 390/Bag |

Grade 53 | Rs 262/Bag | Rs 350/Bag |

### Why Is Cement So Strong?

The production of crystallisation leads to more and more calcium silicate hydrate forming and thickening until the water molecules’ path is blocked and there are no longer any empty, weak spaces in the mixture. This results in a **very low porous**, and therefore very strong, structure.

### What Is Grade of Cement?

The cement grade refers to **the cement compressive strength that** means how much strength cement can yield or bear. As we all know, cement is the vital ingredient of concrete, and its strength is directly proportional to concrete strength.

### Is Code of Opc 53 a Grade?

Codes for cement grades: Earlier, there used to be three IS codes for different grades of OPC. For OPC 33 grade, the IS code was IS 269 and cement bags were marked with IS 269 mark. For 43 grade OPC, the IS code was IS 8112. For 53 grade cement, IS code used to be IS **12269.**

### What Is Good Quality Cement?

The cement should be lump- and dust-free and feel cool to the touch, indicating no hydration reaction is taking place. Look at the color. Cement for building construction should be a **uniform greenish-gray**, while cement for decorative applications is white.

### What Is Opc 53 Grade Cement?

^{2}. 53 Grade OPC provides **high strength and durability to structures** because of its optimum particle size distribution and superior crystallized structure.

### What Do You Mean by Grade 33?

33 grade cement means that the **compressive strength of the cement after 28 days is 33N/mm ^{2}** when tested as per Indian Standards under standard conditions. This grade of cement is used for general construction work under normal environmental condition. It may not be suitable for concrete grade above M20.

### Which Cement Is Best for Plaster?

There are three main Cement Grades from which you can choose. These are **Ordinary Portland Cement (OPC)**, Portland Slag Cement (PSC) and Portland Pozzolana Cement (PPC) available in the market. OPC is available in two grades 43 and 53. Both grades are considered best for plastering work.

### Is Cement Stronger Than Plaster?

At times walls plastered with cement may develop cracks or shrinkage after a few months, but gypsum plaster remains fault-free for a longer time. It doesn’**t mean it is stronger and durable than cement**. When a comparison is made, gypsum plaster seems to earn more favourable points.

### Is Code for OPC 43 Grade Cement?

For 43 grade OPC, the IS code was IS **8112**. The cement bags carrying IS 8112 mark were presumed to be having 43 grade cement.

### Can We Use PPC Cement for Slab?

Portland pozzolana cement (PPC) is **used for the construction of houses, schools, and residential building slabs**. PPC is cheaper than ordinary Portland cement. Thus to reduce the building making cost, PPC should be adopted. Both the PPC and OPC cement is used in the construction of slabs.

### Is Cement Stronger Than Concrete?

**Cement is not stronger than concrete**. On its own, in fact, cement is prone to cracking. When combined with aggregate materials and water and allowed to harden, however, cement now concrete is extraordinarily strong.

### What Is Meant by 43 Grade Cement?

Cement grade indicates the **compression strength** of the cement concrete after 28 days of setting. 43 Grade Cement attains compression strength of 43 Mpa (megapascals) in 28 days of setting compared to 53 Mpa attained by 53 Grade cement.

### Which Cement Is Best for RCC Work?

**53 Grade Cement** is ideal for RCC works, pre-stressed concrete, and mortars because it offers higher density. Seven days after setting, 53 Grade Cement gets 27 MPa, and it’ll reach anywhere from 53 up to 70 MPa.

### What Does Grade 53 Cement Indicate?

53 Grade cement is used for **fast paced construction were initial strength is to be achieved quickly**. 53 Grade cement has fast setting compared to 43-grade cement. 53 Grade attains 27 Mpa in 7 days compared to 23 Mpa by 43-grade cement.

### How Can We Identify 53 Grade Cement?

For 53 grade cement, IS code used to be IS **12269**. All cement bags having 53 grade cement carried IS 12269 mark.

### What Is Meant by 33 Grade of Cement?

33 grade cement means that the compressive strength of the cement after 28 days is 33N/mm^{2} when tested as per Indian Standards under standard conditions. This grade of cement is used for **general construction work under normal environmental condition.**

### Can We Use 43 Grade Cement for Slab?

Unless a project requires very high strength cement, the use of 43 Grade OPC is generally **recommended in general civil construction work** such as residential, commercial and industrial structures. It is used in RCC works, preferably where the grade of concrete is up to M-30.

### Which Is Stronger Cement or Aggregate?

Although the terms cement and concrete are often used interchangeably, cement is actually an ingredient of concrete. Concrete is basically a mixture of aggregates and paste. The aggregates are sand and gravel or crushed stone; the paste is water and portland cement. **Concrete gets stronger as it gets older.**

### Which Cement Is Best for Waterproofing?

Water Repellent Cement is also called **Hydrophobic Cement**. A small amount of Hydrophobic surfactants such as stearic acid, boric acid or oleic acid is mixed with the ordinary portland cement during grinding of clinker. Hydrophobic Cement is most suitable for basements and for making water tight concrete.

### How Do I Know If My Cement Is 53 Grade?

OPC 53 Grade cement is required to conform to BIS specification IS:**12269-1987** with a designed strength for 28 days being a minimum of 53 MPa or 530 kg/sq.cm.

### Which Is the Best 53 Grade Cement in India?

Use of **OPC 53 grade** and PPC ( Portland pozzolana cement) is the best cement for roof dhalai and for all type of RCC structure like footing,slab, beam and column.

### Can We Use 53 Grade Cement for Plastering?

OPC is available in two grades 43 and 53. Both grades are considered best for plastering work. However, OPC 43 Grade is most commonly used because OPC 53 Grade sometimes causes shrinkage cracks to appear. However, **OPC 53 grade is more preferred due to its comprehensive strength and its long-lasting lifetime.**

### Which Cement Is Better 43 Grade or 53 Grade?

The fineness in cement generates early gain in strength, but along with high heat of hydration. OPC 43 grade cement is generally used for non-structural works like plastering flooring etc. Whereas **OPC 53 grade cement** is used in the projects which require higher strength like concrete bridges, runways RCC works etc.

### 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/mm ^{2}) after 28 days of curing**, where cement mould size is 7.06 cm x 7.06 cm x 7.06 cm.

### What’s Difference Between Cement and Concrete?

Although the terms cement and concrete often are used interchangeably, cement is actually an **ingredient of concrete**. Concrete is a mixture of aggregates and paste. Cement comprises from 10 to 15 percent of the concrete mix, by volume.

### Which Cement Is Better 33 Grade or 53 Grade and Why?

The initial strength of **53 grade cement** is higher than 33 grade or 43 grade cement. The strength of 53 grades does not increase much after 28 days due to initial strength increases, while 33 grade and 43-grade cement are gaining strength even after 28 days.

### What Is the Fineness Value for a OPC 53 Grade Cement?

When a 53 grade ordinary Portland cement is tested for its physical requirements, then it must satisfy the following specifications given by IS 12269. The fineness value of 53 grade OPC when tested by Blaine’s air permeability method shall not be **less than 225 m ^{2}/kg.**

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Kishore says

Excellent write-up. However, a minor correction is needed. Fineness is expressed in m2/Kg.

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