What are the physical and chemical properties of OPC 43 Grade cement?


The quality of the development is often easily evaluated by the standard of the materials (like cement) wont to build it. and therefore the quality of the cement grade is defined by its chemical and physical properties.

Before purchasing any cement, it's highly recommended to see whether the cement properties of that brand adhere to the Indian Standard codes.

Physical properties of OPC 43 Grade cement:

SLNO
CHARACTERISTICS
REQUIRED VALUE
1.
Fineness (by Blaines apparatus)
Not less than 225 m2/Kg
2.
Soundness


a) Le Chatelier method
Not more than 10 mm

b) Autoclave test
Not more than 0.8%
3.
Setting time


a) Initial setting time in minutes
Not less than 30

b) Final setting time in minutes
Not less than 600
4.
Compressive strength


a) 72 +/- 1 hour (3 days)
Not less than 27 MPa

b) 168 +/- 2 hours (7 days)
Not less than 37 MPa

c) 672 +/- 4 hours (28 days)
Min -43 MPa, Max -58 MPa

Chemical properties of OPC 43 Grade cement:

SL.NO
CHARACTERISTICS
REQUIRED VALUE
1.
Loss on ignition %
Not more than 4.0%
2.
Magnesia %
Not more than 6.0%
3.
Insoluble residue %
Not more than 4.0%
4.
Sulphuric anhydride %
Not more than 3.5%
5.
Total chloride content %
Not more than 0.10%
6.
Net proportion of lime to Silica, Alumina and Iron oxide
0.66 – 1.02%
7.
Net proportion of Alumina to Iron oxide
Not less than 0.66%

For more info:http://www.meenakshibuildworld.com/offers.php

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