Difference Between OPC and PPC Cement

Difference Between OPC and PPC Cement

The long-form of OPC is Ordinary Portland Cement and the long-form of PPC is Portland Pozzolana Cement. ISI mark on ordinary Portland cement bag is black in colour whereas the ISI mark on Portland pozzolana cement bag is red in colour. Difference between OPC and PPC cement are as follows:

Difference Between OPC and PPC Cement

S.No.
Criteria
                 OPC 
(Ordinary Portland Cement)
             PPC 
(Portland Pozzolana Cement)
1.
Manufacturing process

The raw material used to manufacture OPC are calcareous material containing limestone that is 62 to 70%, argillaceous materials containing silica 17 to 25% Alumina 3 to 8% and oxide of iron 0.5 to 6% gypsum, magnesia sulphur trioxide potash and soda 0.5 to 1.3%. All these materials are mixed in a fixed proportion and heated in kilns to form clinkers which are then grinded to required fineness to obtain ordinary Portland cement.

Whereas the raw materials used to manufacture PPC are OPC cement clinkers 75 to 76 % and gypsum 3 to 5% and pozzolanic material 10 to 25% which can be fly ash, rice husk Ash, volcanic tuff, Pumicites, clay and shale all these materials are mixed and grinded to obtain the Portland pozzolana cement.

2
Grades
As per the classification of Bureau of Indian Standard OPC is available in 33 grade 43 grade and 53 Grade.
Whereas as per Bureau of Indian Standard PPC is available in 1 grade and its strength match to strength of 33 grade OPC after curing.

3
IS Codes
IS code used for OPC 33 Grade Cement is IS 269 for 43 Grade Cement IS 8112 is used and for 53 Grade Cement IS 12269 is used.

Whereas the IS code used for PPC is 1489 (part 1 & 2) 1991.

4
 Strength
In 3 days OPC achieve a compressive strength of 35 N/mm2
in 7 days OPC achieved a compressive strength of 43.5 N/mm2
in 28 OPC achieved a compressive strength of 55 N/mm2

in 3 days PPC achieved a compressive strength of 29 N/mm2
in 7 days PPC achieved a compressive strength of 39 N/mm2
in 28 days PPC achieved a compressive strength of 56.5 N/mm2

5
Durability
The durability of concrete made using OPC cement is less than that of concrete made using PPC cement.

Whereas the durability of concrete made using PPC is higher than OPC which means the structure made up of PPC will last longer.

6
Workability
Workability means how easily it can flow on the surface. the concrete made using OPC cement has lower workability.

Whereas the concrete made using PPC cement has higher workability.

7
 Permeability
permeability is the quality of any substance to measure how much liquid or water can pass through them due to the absence of pozzolanic material ordinary Portland cement is highly permeable to the water.

On the other hand, pozzolana cement is less permeable and it is suitable for a structure Such as bridge piers or a Foundation, where the waterproof structure is recommended.

8
Heat of hydration
The heat of hydration is the heat generated when water and cement react. In case of OPC hydration, the process takes less time for completion and it produces more heat than PPC please note if cement produces more heat in less time than it cannot be used for mass concreting as it may generate cracks in the structure.

Whereas in the case of PPC hydration process takes longer time and produces less heat during the hydration process. Hence it is ideal for mass concreting.

9
Setting time
The initial setting time of OPC and PPC is the same and it is 30 minutes whereas the final setting time of OPC is 280 minutes that is 11.67 days it's setting time is less than PPC so it is recommended in the project where props are to be removed early

On the other hand, the final setting time of PPC is 600 minutes that is 25 days PPC cement prolong the setting time of concrete and hence it helps in better finishing of concrete
10
Fineness
The fineness of OBC is at least 225 square metre per kg which is lower than PPC hence it is easy to handle. 

Whereas the finance of PPC is at least 300 square meters per kg which is higher than OPC hence it is difficult to handle but it is not a major thing.

11
 Resistance to attack against chemicals
In case of OPC resistance to attack against sulphate, alkalies, Chloride and chemicals are slower as compared to PPC

Whereas PPC has more resistance towards the attack of sulphate alkyl Chloride and Chemicals as compared to OPC.

12
Curing time
OPC requires a minimum curing period of 7. When OPC is exposed to hot and dry weather condition the minimum curing period required shall not be less than 10 days. Here you can see the curing period of OPC is less than PPC hence the curing cost reduces and that's why OPC is recommended curing cost are prohibited.

whereas PPC required minimum curing period of 10 days. whereas and when PPC is exposed to hot and dry weather condition the minimum curing period required shall not be less than 14 days.

13
Environmental impact
During the manufacturing process of OPC large amount of COemits.

Whereas PPC contains 10 to 25% pozzolanic material hence it emits less CO2 during manufacturing process here PPC is called as environment-friendly as if utilizes by-products of the thermal station does it reduces the environmental problem.

14
 Cost
The cost of OPC is around 300 rupees per bag which is slightly more expensive than PPC.

Whereas in the case of PPC the expensive clinker is replaced by pozzolanic Material such as fly Ash hence the price of PPC is slightly less than who OPC. Generally, there is a price difference of 5 rupees.  but this slightly lesser price creates a considerable difference in the overall cost of building and impact on the environment.

15
Uses
OPC is the most commonly used cement in construction. Higher grade like grade 53 is not recommended to be used for plastering as it is known to develop shrinkage cracks due to its high strength. OPC is also not used in masonry because motor strength in the initial period is not that critical. OPC can be used for structural members like slab, column and beam. Ideal application for ordinary Portland cement are commercial and industrial complexes, High-rise Building, Road, Bridges, Flyover, Heavy defence structure etc.

On the other hand, PPT can be used in all type of construction works like RCC work in Residential Commercial and Industrial Building, Marine work Mass concrete work like Dam, Huge Foundations Roads, Runway, Bridges and Flyover etc. Especially PPC is used in Plastering, Masonry, Tiling and Waterproofing work as in this work strength is not the major criteria.

                                                                    Both OPC and PPC are commonly used Cement in construction and both have their pros and cons nowadays PPC is used as a substitute of ordinary Portland cement. Since PPC contains pozzolanic material it helps to enhance the strength of concrete and also complete the green building criteria as a result of these nowadays most of the OPC manufacturers are shifting to PPC. I hope you can make the correct choice between OPC and PPC after reading this article. 

Also, read - Difference Between 33, 43 and 53 Grade Cement

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1 Comments

  1. Ordinary Portland Cement (OPC )is developed using various forms of hydraulic limestone, and it is one of the most common for of cement which is used quite frequently as a basic ingredient of stucco, mortar, concrete, and on-specialty grout. Portland Pozzolana Cement ( PPC ) is an integrated cement that is formed by synthesising OPC cement with pozzolanic materials. In order to select the best and most suitable cement for construction of your residential or commercial building it is best to hire a professional masonry contractor to perform the job for you.

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