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