Composite Portland Cement P.C32.5
Items Examine data Mandatory Targets Standard
MgO(%) 2.58 Max 5% GB/T 176-1996
SO3(%) 2.32 Max 3.5% GB/T 176-1996
loss on ignition (%) 4.0 Max 5.0% GB/T 176-1996
CHLORIDION (%) 0.0256 Max 0.06% GB/T 176-1996
Cement fineness (%) 2.4 Max 10% GB/T 1345-2005
Initial setting time 158 Min 45min GB/T 1346-2001
Final setting time 246 Max 600min GB/T 1346-2001
Soundness qualified qualified GB/T 1346-2001
3-day
Strength
(MPa) 3-day bending strength (MPa)
3.8 3.7 3.9 GB/T 17671-1999
Average = 3.8
3-day compressive strength (MPa) 16.7 16.3 17.7 GB/T 17671-1999
17.6 17.0 17.5
Average = 17.1
28-day
Strength
(MPa) 28-day bending strength (MPa) 6.6 6.8 6.4 GB/T 17671-1999
Average = 6.6
28-day compressive strength (MPa) 38.6 37.4 39.2 GB/T 17671-1999
