Clinker & Gypsum

GYPSUM

SPECIFICATIONS	STANDARD OF ANALYSIS	MIN (00-50MM)	MIN (00-20MM)	MAX
Moisture	ASTM C 471M	0.10%	0.10%	1.00%
Combined Water / Crystal Water	ASTM C 471M	18.50%	18.50%	20.30%
Aluminium Oxide (Al2O3)	ASTM C 471M	0.05%	0.05%	0.15%
Iron Oxide (Fe2O3)	ASTM C 471M	0.05%	0.05%	0.15%
Calcium Oxide / Lime (CaO)	ASTM C 471M	31.00%	31.00%	33.00%
Magnesium Oxide (MgO)	ASTM C 471M	0.50%	0.50%	2.00%
Sulphate (SO3)	ASTM C 471M	42.30%	42.30%	45.10%
Cl as Sodium Chloride (NaCl)	ASTM C 471M	0.01%	0.01%	0.01%
Silica (SiO2)	ASTM C 471M	0.30%	0.30%	1.00%
Purity (CaSO₄·2H₂O)	IS 1288	91.00%	90.00%	97.00%
pH	ASTM C 471M	6	6	8

SIZE (00-50MM): 0–50mm = 95%, 0–5mm = 20–25% Max, Above 50mm = 5% Max
SIZE (00-20MM): 0–20mm = 95%, 0–5mm = 40–50% Max, Above 20mm = 5% Max

SR.	SPECIFICATION	UNIT	RESULT	MAX
1	Loss on Ignition LOI	ISIRI 1692	0.25%	0.40%
2	Silicon Dioxide SiO2	ISIRI 1692	21.60%	-
3	Aluminium Oxide Al2O3	ISIRI 1692	5.10%	-
4	Ferric Oxide Fe2O3	ISIRI 1692	3.80%	-
5	Calcium Oxide CaO	ISIRI 1692	65.10%	65% ± 0.3%
6	Magnesium Oxide (MgO)	ISIRI 1692	1.80%	2.50%
7	Sulfur Trioxide S O 3	ISIRI 1692	0.80%	-
8	Equivalent Alkali A.E	ISIRI 1692	0.7	-
9	Insoluble Residue I R	ISIRI 1692	0.25%	-
10	Free Cao F . C a O	ISO 774	1.10%	1.0% ± 0.5%
11	Lime Saturation Factor LSF	Bouge Method	94.40%	-
12	Silica ration SIM	Bouge Method	2.43%	-
13	Alumina ratio ALM	Bouge Method	1.34%	-
14	Tricalcium Silicate C3S	Bouge Method	58.80%	60% ± 2.0%
15	Dicalcium Silicate C2S	Bouge Method	17.50%
16	Tricalcium Aluminate C3A	Bouge Method	7.10%	8.0% ± 0.5%
17	Calcium Alumino Ferrite C4AF	Bouge Method	11.60%	-