What is fresh concrete 2

6.2.2 Consistency classes

The consistency of fresh concrete is described using the consistency classes in the following tables.

The preferred test methods in Germany are testing the slump and, for stiffer concretes, testing the degree of compaction. The test procedures and their implementation are described in Chapter 11.2.1.

Slump classes

class Slump [mm]
S110 to 40
S250 to 90
S3100 to 150
S4160 to 210
S5 1)≥ 220

1) Recommended area of ​​application according to DIN EN 206-1 / DIN 1045-2: ≥ 10 mm and ≤ 210 mm.

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Set time classes (Vébé)

class Setting time [s]
V0 1)≥ 31
V130 to 21
V220 to 11
V310 to 6
V4 1)5 to 3

1) Recommended application range according to DIN EN 206-1 / DIN 1045-2: ≤ 30 s and> 5 s.

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Compaction dimension classes

classCompression dimension [-]Consistency area
C0 1)≥ 1,46very stiff
C11.45 to 1.26stiff
C21.25 to 1.11plastic
C3 1)1.10 to 1.04soft
C4 2)< 1,04-

1) Recommended area of ​​application according to DIN EN 206-1 / DIN 1045-2: ≥ 1.04 and <1.46.
2) Only applies to lightweight concrete.

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Slump classes

classSlump [mm]Consistency area
F1 1)≤ 340stiff
F2350 to 410plastic
F3420 to 480soft
F4490 to 550very soft
F5560 to 620flowable
F6 1) 2)≥ 630very flowable

1) Recommended area of ​​application according to DIN EN 206-1 / DIN 1045-2:> 340 mm and ≤ 620 mm.
2) The DAfStb guideline "Self-compacting concrete" must be observed for spread dimensions over 700 mm.

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