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Structural7 min read

Cement — OPC, PPC, PSC
and which one to specify

Cement is the binding agent in all concrete and mortar. Using the wrong type can lead to cracking, poor durability, and structural failure over time.

1How cement works2Types compared3OPC vs PPC4Storage rules5Brands6Homekrate picks
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The homeowner's summary

For most homes in Bengaluru, PPC (Portland Pozzolana Cement) from a reputed brand like Ultratech or ACC is the best choice. It is stronger in the long run, generates less heat during curing, and is more resistant to cracking than OPC. OPC 53 is used when you need fast strength gain — like in precast elements or high-rise columns. Never use local or unbranded cement for structural work.

Cement types compared

All cement in India governed by BIS standards. One 50kg bag is the standard unit.

Type
Full name
28-day strength
Best use
Recommendation
OPC 33
Ordinary Portland Cement Grade 33
33 MPa at 28 days
General masonry, plaster
Rarely used today
OPC 43
Ordinary Portland Cement Grade 43
43 MPa at 28 days
General RCC, slabs, columns
Basic package
OPC 53
Ordinary Portland Cement Grade 53
53 MPa at 28 days
High-strength concrete, precast
Premium structural work
PPC
Portland Pozzolana Cement
33 MPa at 28 days
Most residential construction
Standard package — best for Bengaluru
PSC
Portland Slag Cement
33 MPa at 28 days
Marine, underground, aggressive soils
Specialist use
White cement
White Portland Cement
33 MPa at 28 days
Finishing, tiles, decorative
Finishing work only

↑ PPC row highlighted — our standard recommendation for Bengaluru residential projects.

OPC vs PPC
OPC
Ordinary Portland Cement
→Gains strength faster — good for fast-track projects
→Higher heat of hydration — more prone to cracking
→Better for cold weather construction
→Required for precast elements and high-rise columns
→More expensive than PPC
PPC
Portland Pozzolana Cement — recommended
→Slower strength gain but higher long-term strength
→Lower heat of hydration — less cracking
→More workable — easier to place and finish
→Better resistance to sulphates and chlorides
→Best for Bengaluru's climate and soil conditions
How to store cement correctly
01
Store off the ground
Never place cement bags directly on the floor. Use wooden planks raised at least 150mm to prevent moisture absorption from below.
02
Keep 300mm from walls
Maintain clearance from walls. Cement absorbs moisture from walls, leading to lumps and loss of strength.
03
Stack maximum 10 bags high
Stacking too high compresses lower bags and causes premature setting. 10 bags is the IS code recommendation.
04
Use within 3 months
Cement loses ~20% strength after 3 months and 30% after 6 months. Always check the manufacturing date on the bag.
05
Cover with waterproof sheets
Always cover stored cement with polythene sheets. Even in covered storage, humidity can cause partial setting.
06
First in, first out
Always use older stock first. Rotate bags so freshest stock is always at the back of the storage area.
Reputed brands in India
UltratechACCRamcoBirla WhiteDalmiaShree CementAmbujaIndia CementsZuariMaha Cement

Always check the manufacturing date on the bag. Never use cement older than 6 months for structural work.

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Homekrate specification
Basic
Ramco OPC 43 or equivalent
For minor structures and compound walls. Not recommended for main RCC frame.
Standard
Ultratech PPC or ACC PPC
Our default for all residential projects. Best long-term performance in Bengaluru.
Premium
OPC 53 for structure + Birla White for finishing
Highest strength for columns and beams, premium finish work.
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