Concrete Grades

"Ready-mixed concrete was first produced in Germany at the beginning of the twentieth century (1903), and then in the US in the following few years. In 1914, the first transit-mixer was developed in the US with the purpose of transporting the concrete. Immediately after the transit-mixer was developed in the US, in 1927, German engineers patented the “Grout Pump”, which is to be used to pump the concrete from the transit-mixer to the site, where the concrete will be used. Many ready-mixed concrete companies were founded after the war years in particular, some of which are still operational today. In the following years, it did not take long for the ready-mixed concrete to spread and to be adopted as the basic construction material, and the ready-mixed concrete was started to be produced and used in many countries in a short period of time.

Classification by Compressive Strength

Classification by Slump Consistency

S1 (0-50 mm)

S2 (50-90 mm)

S3 (100-150 mm)

S4 (160 - 210 mm)

S5 (> 220 mm)

Classification by the Largest Aggregate Particle Size 

16 mm

22 mm

Classification by Environmental Impact

Impact class (XO) without risk of corrosion or harmful effects
Corrosion effect class (XC) caused by carbonation
Corrosion class (XD) caused by chlorides other than sea water
Corrosion effect class (XS) caused by chlorides from sea water
Freeze / thaw effect class (XF)
Chemical impact exposure class (XA)
Mechanical wear class (XM)

Classification by Density 

Light
Normal
Heavy

Classification by Chloride Content

Cl 1,00

Cl 0,40

Cl 0,20

Cl 0,1"