Cement is such a very
important and essential component when building a house. It is a bonding
material that plays an important role in the manufacture of concrete and
mortar. There are different types of cement available in the market,
1. Ordinary
Portland cement
2. Portland
Pozzolana cement
3. Rapid
hardening cement
4. Low
heat cement
5. White
cement
6. Blast
furnace slag cement
7. Sulphate
resisting cement etc.
Each type of cement has its
special and unique properties as well as the advantages associated with it.
Therefore, it is important to select the specific cement according to the
nature of the construction, the surrounding exposure, the method of placing the
concrete, etc.
In this article, we are
talking about OPC Vs PPC because both are the most used cement in the construction
industry. Today, PPC is used as an alternative to OPC. So the most confusing
thing is how to make the right decision. It is not necessary to take the course
blind. Know its properties, recommended uses, profitability, etc. This will
give you a better idea of what cement to use and where.
GENERAL |
|
OPC (Ordinary Portland
Cement) |
1. It is the most widely
used cement in the world mainly because it is available in abundance and the
associated cost is comparatively low. 2. OPC cement is
produced simply by crushing limestone and secondary materials into a powder. 3. However, today's
manufacturers don't even make OPCs. They have opted for PPC cement as an
alternative. |
PPC (Pozzolanic Portland Cement) |
1. Portland pozzolana
cement (PPC) is a variation of OPC that includes a mixture of a pozzolanic
material known to increase the strength of concrete and reduce the amount of
OPC used. 2. Nowadays, it is used
as a replacement for OPC because it is known to meet the criteria of green
building and therefore contributes to sustainable development. |
If you
need to its manufacturing process, raw materials used and bull**** please read
this s***
ALSO
READ: DETAILED
MANUFACTURING PROCESS OF CEMENT
ADVANTAGES OF OPC
CEMENT
· OPC is
best suited for use in general concrete construction when there is no exposure
to sulfates in the soil or groundwater.
· Ordinary
Portland cement is easier to handle than the PPC because the PPC is better than
the OPC.
· The Curing
time of OPC is shorter than that of PPC. Therefore, the cost of curing is
reduced, so the cost of healing is recommended where restricted.
· The main material for the production of many types of special types of cement such as OPC
is,
(A) Rapid hardening Portland cement
(B) Low heat Portland cement
(C) Portland Slag Cement
(D) Portland Pozzolana cement etc.
DISADVANTAGES OF OPC
CEMENT
· The
main disadvantage of OPC is that it emits high levels of CO2. This is harmful
to the environment.
· Ordinary
Portland cement cannot be applied to mass concrete compared to PPC, which
causes compression cracks in the structure.
· High
quality such as grade 53 is not recommended for plastering because it is known
to create shrinkage cracks due to its high strength and high heat of hydration.
· Its
resistance to aggressive chemicals, alkalis, sulfates, and chlorides is less
than that of the PPC; So it can be said that OPC is less durable than PPC.
· It
produces less cohesive concrete compared to the PPC; So the concrete pump will
be a little harder, otherwise, compounds will have to be used to increase its
efficiency.
· OPC is
more expensive than PPC.
ADVANTAGES OF PPC
CEMENT
1. Portland
Pozzolana Cement is a green material, so it is environmentally friendly and can
help achieve a green rating.
2. PPC is
the best choice for mass concrete as hydration is low. It is good and very
suitable for plaster and masonry work.
3. It has
good fineness; It therefore has better synchronization with the aggregates and
forms a denser concrete matrix. Therefore, it has low penetration, resulting in
high durability and stability.
4. PPC
improves the performance of the concrete so that it can be easily pumped as a
result.
5. It
gives good surface finish.
6. It
provides resistance to the attack of various chemicals, alkalis, sulfates, chlorides
etc.
7. It is
less expensive compared to OPC because expensive cement clinkers are replaced
by cheaper posolana materials.
8. 1 bag
gives more motor than BBC (50 kg) OBC bag because the pozzolanic material is
soft and it has low density.
DISADVANTAGES OF PPC
CEMENT
1. It’s
hard to handle because the PPC is high fineness.
2. Its
initial strength is lower than that of OPC. So obstacles cannot be removed
initially.
3. The curing
time of PPC is slightly longer compared to OPC.
USES AND APPLICATIONS
OPC (Ordinary Portland Cement)
1. OPC is
highly recommended where construction requires the fastest pace of
construction.
2. Ordinary
Portland cement can be used in all common concrete construction that is not
exposed to sulphates in port soil or groundwater, and where it is desired to
remove formwork quickly.
PPC (Pozzolanic Portland Cement)
It can
be used in all types of construction Example:
1. RCC
(Reinforced Cement Concrete) is involved in residential and commercial works.
2. Plaster
and masonry, high strength where is not so important.
3. In
mass concrete work, eg. Dams, large foundation.
4. Marine
works
5. Road,
track, bridge and flyover. etc
6. Commercial
and industrial premises.
7. Recommended
for all structural non-concrete such as wall mortar
8. Adding
different mixes to the concrete mix will help achieve a quicker texture. Higher
setting time can be controlled by using the proper mixer.
CURING TIME
OPC (Ordinary Portland Cement)
The minimum curing time of OPC
is 7 days and when exposed to hot and dry weather conditions the minimum curing
period should not be less than 10 days As per ‘IS 456: 2000’ (Plain and
Reinforced Concrete – Code of Practice),.
PPC (Pozzolanic Portland Cement)
minimum curing period of any
blended cement (like PPC) is at least 10 days and when exposed to hot and dry
weather condition the minimum curing period shall not be less than 14 days. As
per ‘IS 456: 2000’ (Plain and Reinforced Concrete – Code of Practice),
Q/A 272: OPC VS PPC
SETTING TIME
TYPES/GRADES
OPC (Ordinary Portland Cement)
Different grades of OPC cement
available in India:
01. OPC 33 Quality
02. OPC 43 quality
03. OPC 53 grade
Keep in mind that the final
strength depends on the design of the concrete mix, not just the strength of
the cement.
PPC (Pozzolanic Portland Cement)
The specific type of cement available in OPC is not
available in these types.
It is classified into different types depending on the type
of pozzolanic material used; Different posolanic materials used:
01. To fly to the ashes
02. Calcine clay
03. Rice husk ash
04. Volcanic Tuff and Pumicites
05. Clay & Shale
Fly ash is a commonly used posolanic material.
STRENGTH
OPC (Ordinary
Portland Cement)
The initial strength of ordinary cement is higher than that
of PPC, but the final strength is the same.
PPC (Pozzolanic Portland Cement)
The initial strength of Portland posolana cement is lower
than that of OPC, but the final strength is the same.
ENVIRONMENTAL IMPACT
OPC (Ordinary Portland Cement)
OPC has a major adverse effect
because it releases large amounts of CO2 during its manufacturing process.
PPC (Pozzolanic Portland Cement)
Portland Pozolana Cement is
environmentally friendly because it uses by-products such as ash flying from a
thermal power plant. Where there is a problem with the removal of by-products
such as fly ash, this cement makes better use of fly ash. It emits less CO2
compared to OPC.
COST
OPC (Ordinary Portland Cement)
The price of ordinary Portland cement per bag is higher
than the OPC.
PPC (Pozzolanic Portland Cement)
The price of Portland Pozzolana
cement is slightly lower than the OPC bag.
Final words
Both OPC and PPC are commonly
used in construction cement and both have their pros and cons. Nowadays PPC is
used as an alternative to ordinary Portland cement.
Because the PPC contains
pozzolanic material, it can help improve the strength of concrete and meet
green building standards.
Now that you understand the
difference between these two cements, I hope you can make the right choice
between OPC and PPC after reading this article.
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helpful please share it.
Thanks!
For
reading the article.
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