ZORN INSTRUMENTS ZFG 3000 GPS User Manual

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14. Correlations
For information purposes only, no guarantee of information correctness.
Quote from German ZTVE- STB 09, Research Institute for Road and Traffic
(Edition 2009)
4.5.2 Requirements for deflection modulus
The information provided below is based on the 10% minimum quantile.
When constructing roads of Construction Classes SV and I to IV (see A & B tables) on frost-protected substrate
or substructure, then the following deflection modulus of at least
E
v2
= 120 MN/m² or alternatively E
vd
= 65 MN/m²
and for Construction Classes V and VI a deflection modulus of at least
Ev2 = 100 MN/m² or alternatively Evd = 50 MN/m²
is necessary.
The deflection modulus E
v2
is to be verified in accordance with a static plate load test in accordance
with DIN 18134 and the deflection module E
vd
with a dynamic plate load test in accordance with TP
BF Part B 8.3.
When the requirements were meet, through compaction of the sub bases on the planum, it is
sufficient to achieve a deflection modulus on the planum of at least
E
v2
= 100 MN/m² or alternatively E
vd
= 50 MN/m²
and for Construction Classes V and VI a deflection modulus of at least
E
v2
= 80 MN/m² or alternatively E
vd
= 40 MN/m².
In the case of frost-sensitive substrate or substructure, a deflection modulus of at least
E
v2
= 45 MN/m² [or alternatively E
vd
= 25 MN/m²]
is required on the planum.
After improving the soil and in the case of frost-sensitive substrate or substructure, a deflection
modulus of at least
E
v2
= 70 MN/m² [or alternatively E
vd
= 40 MN/m²]
is required on the planum.
1
If the specifications do not specify whether the deflection modulus is static or dynamic, it must be
verified for cases stated in this section; verification should always take place using the static
deflection modulus.
If the required deflection modulus cannot be achieved on the planum through compaction, either
(1) the substrate or substructure must be improved or consolidated, or
(2) the thickness of the loose sub bases must be increased.
These activities or locale experiences must be stated in the specifications.
1
[…] Editor‘s note

ZORN INSTRUMENTS ZFG 3000 GPS Specifications

General

Brand	ZORN INSTRUMENTS
Model	ZFG 3000 GPS
Category	Measuring Instruments
Language	English