OPC 43 Grade

Ordinary Portland Cement 43 grade is manufactured by inter grinding of high grade clinker (with optimum C3Scontent) and right quality gypsum in appropriate proportions.

Properties a) Physical	Requirements as per IS 8112-1989	Bharathi cement values	Competitors values
Fineness (sqm/kg)	225(min)	325	280
Soundness (mm)
Lechatlier method	10mm (max)	1	1.5
Autoclave (%)	0.8 (max)	0.03	0.05
Setting time
Initial (min)	30 minutes	150	280
Final (max)	600 minutes	260	340
Compressive strength (MPa)
1 day		17	14
3 days (min)	23	35	30
7 days (min)	33	45	40
28days (min)	43	63	51
b) Chemical
1) Lime saturation factor	0.6-1.02	0.9	0.8
2) Alumina Modulus	0.66 (min)	1.23	1.24
3)Insoluble residue (%)	3 (max)	0.25	1.5
4)Magnesia (%)	6 (max)	1	1.02
5)Sulphuric anhydrideSO3 (%)	3 (max)	1.5	2.3
6)Loss on ignition (%)	5 (max)	0.8	1.5
7)Alkalies			0.6
8) Chloride (%)	0.1 (max)	0.002	0.02
9) C3A Content		7
10)Temperature during Testing	27±2	27±2	27±2
11)Humidity (%)	65±5	65±5	65±5

APPLICATIONS:

All types of R.C.C.works
Residential and commercial complexes
Industrial structures
Bridges, dams, irrigation works
For highways, runways etc.