Portland Cement Requirement   
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Chemical composition Requirements  according to Gulf 
Standard GSO  1914  : 2009  
          
   I IA II IIA III IIIA IV V 
 1 Aluminum Oxide (Al 2O3) max. %      6.0 6.0         
2 Ferric Oxide (Fe 2O3) max. %      6.0 6.0     6.5   
3 Magnesium Oxide (MgO) max. %  5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 
4 Sulphur Trioxide (SO 3) max. %                  
   When (C 3A) ≤ 8% 3.0 3.0 3.0 3.0 3.5 3.5 2.3 2.3 
   When (C 3A) > 8%  3.5 3.5 F F 4.5 4.5 F F 
5 Loss on Ignition max. %  3.0   3.0 3.0 3.0 3.0 2.5 3.0 
6 Insoluble Residue max. %  1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 
 7 Tri calcium silicate (C3S) max. %              35   
 8 Dicalcium Silicate (C2S) min. %  --- ---         40 --- 
9 Tricalcium Aluminate (C3A) max. 
% --- --- 8 8 15 15 7 5 
 10  Sum of (C3S + 4.75C3A) max. %      100 100         
 11 Tetracalcium Aluminoferrite + 
twice Tricalcium Aluminate (C4AF 
+ 2C3A) or the Solid Solution + 
(C4AF + C2F) as applicable, max. 
%         --- ---   25 
 12 Equivalent alkalines (Na2 + 
0.658K2O) max. %  0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Portland Cement Requirement   
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Mechanical  and Physical Requirements according  to Gulf 
Standard GSO  1914  : 2009  
  Cement Type  
    I IA II IIA III IIIA IV V 
1 Air content in Mortar                  
  volume, max. %  12 22 12 22 12 22 12 12 
  min %  --- 16 --- 16 --- 16 --- --- 
2 Fineness, specific surface, 
m2/kg                  
                  
  (alternative  methods)                  
i- Turbid meter  test                 
  Average value, min.  160 160 160 160 --- --- 160 160 
  For one sample, min.  150 150 150 150 --- --- 150 150 
  Average value, max.  --- --- 240 240 --- --- 240 --- 
  For one sample, max.  --- --- 240 240 --- --- 245 --- 
ii- Air permeability                  
  Average value, min.  280 280 280 280 --- --- 280 280 
  For one sample, min.  260 260 260 260 --- --- 260 260 
  Average value, max.  --- --- 420 420 --- --- 420 --- 
  For one sample, max.  --- --- 430 430 --- --- 430 --- 
3 Autoclave expansion, 
max. %  0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 
4 Compressive strength in 
Mpa, minimum                  
  1 day          12 10     
  3 days  12 10 10 8 24 19 --- 8 
  7 days  19 16 17 14 --- --- 7 15 
  28 days  28 22 28 22 --- --- 17 21 
5 Setting time, in minutes, 
Vicat test                  
  Initial setting time, min.  45 45 45 45 45 45 45 45 
  Final setting time, max.  375 375 375 375 375 375 375 375 
 
 
 
 Portland Cement Requirement   
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Optional Mechanical and Physical Requirements according to 
Gulf Standard GSO  1914  : 2009  
 
  Cement Type  
    I IA II IIA III IIIA IV V 
1 False setting                  
  final penetration , min. %  50 50 50 50 50 50 50 50 
2 Heat of Hydration                  
                  
  7 days, max, kJ/kg (cal/g)  --- 290 
(70) 290 
(70) --- --- --- 250 
(60) --- 
  28 days, max, kJ/kg (cal/g)  --- --- --- --- --- --- 290 
(70) --- 
3 Sulphates resistance, 14 
days max, expansion %  --- --- --- --- --- --- --- 0.040  
4 Setting time in minute, 
Gilmore test                  
  Initial setting time, min.  60 60 60 60 60 60 60 60 
  Final setting time, max.  600 600 600 600 600 600 600 600