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CEM II/B-M (V-L) 42,5 N

CEM II/B-M (V-L) 42,5 N, MKS; CEM II/A-V 42,5 R
*) 45S – a class of cement with ordinary early (at 3 days) compressive strength indicated by C

Standard: Actual valid standard is MKC, According to the EN 197-1, this type and strength class of cement is equivalent to  CEM II/A-M  42.5N

Composition: Portland cement with additive of natural or artificial pozzolana. Hydraulic binding material which is produced by grinding of Portland cement clinker, gypsum and maximum 15% of additives.
Natural gypsum is used as a regulator of the setting time.

Natural and artificial pozzolana for cement production are siliceous or silico -aluminous  materials, which fine grinded in the presence of water  reacts with calcium hydroxide producing products with hydraulic properties (MKS B.C1.018)

Application: according the Rulebook on technical measures and requirements for concrete and reinforced concrete (BAB '87).

Characteristic:

Chemical requirement

Standard requirements

Achieved values 2008

Loss of ignition (no moisture at 105oC) max %

5

2-2.5

Insoluble residue, max %

/

/

SO3 , %

3.5

2.5-3

Chlorides, max %

0.1

0.0068

Residue on 0.09mm sieve, max

5

2.6-2.8

Specific surface acc. to Blaine cm2 /g

2400

3500-3700

Volume without pores and cavities, min g/cm2

3

 

Setting time
Initial, not before min
Final, not after h

60
10

150
2.6

Bending strength at 3 days MPa

min 3

5

Compressive strength at 3 days MPa

min 14

29.4

Bending strength at 28 days Mpa

min 5.5

8.3

Compressive strength at 28 days MPa

min 40

52.7

Soundness (Expansion) mm

max 10

0.8

 Water demand %

 max 31

 28.9


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