What is CEM in concrete?

CEM 1 Portland Cement. CEMEX Portland is produced by burning a precisely specified mixture of raw materials containing lime, silica, alumina and small quantities of other materials to form a clinker. The clinker, together with calcium sulfate to control setting, is then ground to produce cement of the required fineness …

What is CEM III A?

Ecocem Cement (CEM III/A) is a specially formulated blend of traditional cement and a minimum of 50% Ground Granulated Blastfurnace Slag (GGBS) that is EN 197-1 certified CEM III/A 42.5N cement. The whiter colour and smoother finish achieved with Ecocem CEM III/A make it the cement of choice for architectural concrete.

What is CEM II cement?

Types of Cement – CEM CEM II is a mixture of OPC and additives such as fly ash, slag or limestone, up to a maximum additive content of 35%. A contains the least slag at 40%, C contains the most at 90%.

What is CEM1 cement?

Put SIMPLY, a CEM1 mix contains 100% cement. A CEM2 mix is up to 35% cement replacement, (therefore, contains 65% cement). A CEM3 is up to 55% cement replacement, (therefore, contains 45% cement). Cement replacement will reduce the speed of set, which can of course be useful in the summer.

What is the difference between CEM I and CEM II?

CEM I: Portland cement with a maximum of 5% other materials. CEM II: all kind of hybrids of Portland cement with for example slate, fly ash, slag… CEM IV: Pozzolana cement varieties (this type of cement is not produced in Belgium). CEM V: composite cements, with mixtures of Portland cement, slag and Pozzolana.

What are the 5 types of cement?

Types and Grades of Portland Cement

Rapid Hardening Portland Cement (RHPC)
Hydrophobic Portland Cement (HPC)
Low Heat Portland Cement (LHPC)
Sulphate-resisting Portland Cement (SRPC)
Other Types in Cement.

What is Type 2 cement used for?

Type II cement will usually generate less heat at a slower rate than Type I. With this moderate heat of hydration (an optional requirement), Type II cement can be used in structures of considerable mass, such as large piers, heavy abutments, and heavy retaining walls.

What is class R cement?

Note that cement strength classes R, N and L are a descriptors used in EN 197 Cement to denote Rapid, Normal and Low early cement strength development.

What does R mean in cement?

The grades corresponds to the minimum 28th day compressive strength of cement, also referred to as cement strength classes of 32.5 Mpa, 42.5 Mpa and 52.5 Mpa respectively. While the appendage “N” refers to a class of cement with ordinary early strength, “R” Refers to those with high early strength.

Can I mix cement with water only?

Cement mixed with water alone creates a grout which can be used for repairing any damage on concrete structures. This cement-based grout mix is also used in situations where normal concrete won’t work, such as underwater concreting. Concrete is used all over the world because it is durable, economical and versatile.

What is a cement binder?

In building construction, concrete uses cement as a binder. Traditionally straw and natural fibres are used to strengthen clay in wattle-and-daub construction and in the building material cob which would otherwise become brittle after drying. Sand is added to improve compressive strength, hardness and reduce shrinkage.

What are the grades of CEM III concrete?

There are three types of CEM III: A, B and C. A contains the least slag at 40%, C contains the most at 90%. Within each type there are three grades, based on the 28-day strength of the concrete that they produce. The grades are 32.5, 42.5 and 52.5 (sometimes written 33, 43, 53).

What kind of cement is used in ecocem?

What is Ecocem Cement (CEM III/A) Ecocem Cement (CEM III/A) is a specially formulated blend of traditional cement and a minimum of 50% Ground Granulated Blastfurnace Slag (GGBS) that is EN 197-1 certified CEM III/A 42.5N cement.

What are the different types of Portland cement?

There are 5 types of cement : CEM I, II, III, IV, V. For general construction use only types I and II are relevant. CEM I is pure (100%) OPC (Ordinary Portland Cement) CEM II is a mixture of OPC and additives such as fly ash, slag or limestone, up to a maximum additive content of 35%. CEM III is a mixture of OPC and blast furnace slag.

What kind of cement is used in Belgium?

CEM IV: Pozzolana cement varieties (this type of cement is not produced in Belgium). CEM V: composite cements, with mixtures of Portland cement, slag and Pozzolana. Cement types are indicated by CEM followed by the number of the main sort in Roman numerals.

What is CEM in concrete? CEM 1 Portland Cement. CEMEX Portland is produced by burning a precisely specified mixture of raw materials containing lime, silica, alumina and small quantities of other materials to form a clinker. The clinker, together with calcium sulfate to control setting, is then ground to produce cement of the required fineness…