Binders (Cement)

Cement to the standard

Cement : is the hydraulic binder (hydraulic = hardening when combined with water) which is used to produce concrete. Cement paste (cement mixed with water) sets and hardens by hydration, both in air and underwater.

The main base materials, e.g. for Portland cement, are limestone, marl and clay, which are mixed in defined proportions. This raw mix is burned at about 1450°C to form clinker
which is later ground to the well-known fineness of cement.Cement to the standardThe standard divides the common cements into 5 main types, as follows: ·     CEM I:               Portland cement
·     CEM II:             Composite cements (mainly consisting of Portland cement)
·     CEM III:            Blast furnace cement
·     CEM IV:            Pozzolan cement
·     CEM V:              Composite cement
 Under the above table, the various types of cement may contain other components as well as Portland cement clinker (K):Major components

Granulated slag                                              (S)

Silica dust                                                         (D)

Natural and industrial pozzolans            (P or Q)

High silica and limestone fly ashes        (V or W)

Burnt shales (e.g. oil shale)                      (S)

Limestone                                                       (L or LL)