Maha – Portland Slag
Cement (PSC), conforming to the IS 455-1989, is manufactured from high
quality clinker and superior quality granulated blast furnace slag. The slag
used contains more than 95% glass content – the most desired parameter to
manufacture PSC. The unique feature of our Grinding Units used for
manufacturing this cement is the Vertical Roller Mills (VRM) – the most modern
technology imported from LoescheGmBH, Germany. The clinker and slag are
separately ground to reach high fineness level and then blended in a high
efficiency mechanical blender. This has not only enabled us to achieve high
fineness (Blaine 3700+ cm2/g) in our Maha Cement but also steep particle size
distribution (PDS) which helps Maha Cement achieve high early strength and
excellent durability properties in concrete.
Maha Cement is best for all types of constructions. It is
especially recommended in regions where the structure is exposed to harsh
environmental condition.
The advantages of using Maha – Portland Slag Cement (PSC)
· Higher
strength and high durability
· Improved
workability and consistency
· Progressive
increase in strength over the years
· Higher
resistance to corrosion
· Maximum
resistance to alkalis and sulphates attack
· Smooth
Surface finish – no surface cracks
· Low
Heat of Hydration – most suitable for mass concrete work
· Ideal
for both concreting and plastering
Please refer the below table for its typical values as
against requirement as per IS 455.
Physical Requirements |
Requirement as per
lS 455 |
|
|
Fineness |
Specific
Surface (m2/kg) |
225
(min) |
330-600 |
Setting
Time |
a.
Initial minutes) |
30
(min) |
180-200 |
b.
Final (minutes) |
600
(max) |
280-300 |
|
Soundness |
Expansion of unaerated
cement |
||
a. By LeChatelier Method
(mm) |
10
(max) |
0.0-1.5 |
|
b. By Auto Clave (%) |
0.8
(max) |
0.04-0.08 |
|
Compressive
Strength |
a. 72 ± 1 hr i.e. 3 days (M
Pa) |
16
(min) |
24-26 |
b. 168 ± 2 hr i.e. 7 days (M
Pa) |
22
(min) |
36-38 |
|
c. 672 ± 4 hr i.e. 28 days
(M Pa) |
33
(min) |
56-58 |