Durability

• Depends on water / cement ratio;
• M 100; M 150; M 200.M 550 and so on.is displayed

Flow

• Mainly depends on the amount of water 
• Depends on the amount of additives
• Depends on the size modulus (IM) of the filler.
• Divides into classes (S1; S2; S3; S4; S5)
• Each of the classes has certain conical depressions; (S4 = 16 - 21)

Waterproofing

• Displayed as W2, W4, W6

Sulfate – resistance

• There are two degrees:
  • resistance to sulfate;
  • high sulfate - resistance
• The degree of sulfate resistance is determined by "sulfate ions" in groundwater or in the soil itself (dry soil).
• CaSO4, Na2 SO4; - SO4 - here is the part that breaks down the concrete. (SO4)

Frost – resistance

• It is marked with the letter "F"
• To increase frost resistance:
  • concrete must be very dense
  • must draw a minimum of water to itself
  • Amount of cement should be a lot
  • concrete must have closed micro-pores (through special additives)