Tianjin Wanxun introduces the vertical penetration test procedure of geotextile
The geotextile vertical permeation instrument is a geotextile test instrument independently developed by Tianjin Wanshen Test Equipment Technology Co., Ltd. Today we will introduce the test process of the geotextile vertical permeation instrument.
Geotextile vertical permeameter
[Experimental procedure
]
:1
Place the sample in water containing a humectant, at least soak
12h
Until saturated and get rid of the bubbles. Wetting agent
0.1%V/V
Sodium alkyl benzene sulfonate.
2
. Remove the high pressure chamber (see the diagram between instruments)
12
) Install the test piece (
5
) in the holder
6
), sample requirements: the sample should be clean, the surface is free of dirt, no visible dirt or creases, should not be folded, and should be placed in a flat place, no load should be applied on it. Then install the high pressure chamber and tighten the high pressure cylinder nut in equilibrium.
3
, open the water valve
(3)
by(
1
) Inject a clean water source into a high pressure water tank (
2
). Until the water level on both sides reaches
50mm
Head difference
11
). Turn off the water supply if the water heads on both sides of the specimen are
5min
It cannot be balanced internally to find out if there is no clean air. turn on
(13)
The exhaust valve is re-vented. And noted in the test report.
4
Adjust the water flow so that the head difference is reached
70mm
±
5mm
, record this value. Accurate to1mm
. Waiting for the head to stabilize
30s
After the specified time period, the cylinder is collected (
8
The osmotic water collection tube passes through the instrument's amount of permeate water, and the volume is accurate to
10mL
Time is accurate
s
, collecting the amount of permeate
1000mL
At least
30s
.
5,
Maximum head difference
0.8, 0.6, 0.4
with
0.2
Double the head difference. Repeat above
2.3.4
The procedure starts from the highest flow rate to the end of the lowest flow rate and records the corresponding amount of permeate and time.
6
, record the water temperature, accurate to
0.2
°C
.
7
, the calculation of the results, please
T1141-2006
The corresponding standard.
Geosynthetics vertical permeameter test completed to open the drain valve (
4
), drain all parts of the water. Clean the surface of the instrument.
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