Cement

Introduction:

1.   China standard  «GB175-2007»

(1) Solicate cement / Portland cement

1) Portland cement:PI42.5、PI52.5、PI62.5,code is P.I

A hydraulic cementitious material made of Portland cement clinker, 0%~5% limestone or granulated blast furnace slag and an appropriate amount of gypsum,It is mainly used in projects with high cement hardening strength requirements.

2) Ordinary Portland cement :PO32.5、PO42.5、PO52.5, code is P.O

The hydraulic cementitious material is made of Portland cement clinker, 6%~20% mixed material and an appropriate amount of gypsum grinding fine.It is mainly used in ordinary dry environment, and can also be prioritized for use in colder areas.

3) Slag Portland cement: PS32.5、PS42.5、PS52.5, code is P.S

The hydraulic cementing material is made of Portland cement clinker, 20%~70% granulated blast furnace slag and an appropriate amount of gypsum,This type of cement is mainly used in the environment of high humidity, and the underwater use has the irreplaceable role of other types of cement.

4) Portland pozzolan cement: PP32.5、PP42.5、PP52.5, code is P.P

The hydraulic cementitious material is made of Portland cement clinker, 20%~40% pozzoline mixed material and appropriate amount of gypsum grinding fine,This type of cement is generally used in ordinary environments, and this type of cement is strictly prohibited from being used in dry or cold environments.

5) Portland fly-ash cement :32.5、32.5r、42.5、42.5r、52.5、52.5r, code is P.F

A hydraulic cementitious material made of Portland cement clinker, 20%~40% fly ash and an appropriate amount of gypsum.

6) Complex portland cement:32.5、32.5r、42.5、42.5r、52.5、52.5r, code is P.C

A hydraulic cement material made of Portland cement clinker, 20%~50% of two or more specified mixed materials and an appropriate amount of gypsum grinding fine.

7) White portland cement: made from Portland cement clinker with little iron oxide content, adding an appropriate amount of gypsum and grinding fine.

8) Oil well cement: The cement made of Portland cement clinker composed of appropriate minerals, appropriate amount of gypsum and mixed materials is suitable for oil and gas well cementing engineering under certain well temperature conditions