ZORN INSTRUMENTS ZFG 3000 ECO, User Manual

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For information purposes only, no guarantee of information correctness
Construction material and
soil engineering institute, Wetzlar
Backfilling of trenches
Verification of compaction with
light drop weight tester
in accordance with TP BF-StB Part 8.3
Indicators for the allocation of
Compaction ratio D
pr
Dynamic deflection modulus E
vd
Required
compaction at
various depths
(ZTVT-StB 95*)
(ZTVE-StB 94)
Based on guide
values for
allocation to D
pr
(ZTVE-StB 94
Tab. 8)
1)Proposal for
allocation of
E
vd
to E
v2
(in acc. w. FGSV
AA Prüftechnik,
Oct. 96 edition)
Soils group Compaction ratio
D
pr
Deflection modulus
E
v2
Deflection modulus
E
v2
DIN 18 196 % MN/m² MN/m²
GW, GI
(e.g. stony soil
or mineral
aggregate 0/32) 
103

100

98

97

120

100

80

70

60

50

40

35
GE,SE,SW,SI 
100

98

97

80

70

60

40

35

32
mixed and fine-
grained soils 
100

97

95

45

30

20

25

15

10
1) These indicator values can be used as guide values for the verification
of the compaction achieved in acc. w ZTVE-StB 94, para. 14.2.5 as agreed
between client and contractor.