PORTLAND CEMENT GB175-2007 P.C32.5
"composite portland cement
P.C32.5"
Items Examine date Mandatory targets Standard
Mgo(%) 2.58 Max 5% GB/T 176-1996
SO3(%) 2.32 Max 3.5% GB/T 176-1996
L.O.I(%) 4 Max5.0% GB/T 176-1996
Chloridion(%) 0.0256 Max0.6% GB/T 176-1996
Fineness(%) 2.4 Max10% GB/T 1345-2005
Initial setting time 158 Min45 GB/T 1346-2001
Final setting time 246 Max600 GB/T 1346-2001
Soundness qualified qualified GB/T 1346-2001
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 17.5
Average=17.1
28-day bending strenght(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
38.5 38 38.2
Average=38.3
