International
Operating Instructions
VACUUM PYCNOMETER
Model:
45-9300 (AP-132)
Distributor:
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
ELE International, Ltd.
Chartmoor Road Chartwell Business Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
International
VACUUM PYCNOMETER
MODEL 45-9300 (AP-132)
I.
GENERAL INFORMATION
The 45-9300 (AP-132) Vacuum Pycnometer is designed to be used in determining the
theoretical maximum specific gravity of bituminous paving mixtures, using the procedure
described in ASTM standard test method D 2041 for type F containers. This large
capacity (approximately 10 liters) unit can easily handle samples up to 13.2 lbs (6 kg),
minimizing segregation effects. Constructed of lightweight polycarbonate, the
45-9300 (AP-132) Vacuum Pycnometer has a transparent top for easy visual
observations of the vacuum effects.
II.
RELATED USER DOCUMENTATION
These operating instructions do not contain all the required information for the
standard test method used to determine the theoretical maximum specific gravity
and density of bituminous paving mixtures. Please refer to ASTM D 2041 for
additional information.
III.
CALIBRATION
Calibrate the pycnometer by determining the mass of the container when it is
filled with water at a range of temperatures, from 60 to 150°F (15 to 65oC), or as
required. Prepare a graph with temperature vs. mass of the pycnometer filled
with water for the selected range of temperatures. Designate the mass of the
container at 77 ± 0.9°F (25 ± 0.5°C) as "D." Refer to ASTM D 2041 for further
assistance in calibrating and graph preparation.
1
Distributor:
ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
International
IV.
OPERATION
A.
Sample Preparation
Follow the procedure outlined in ASTM D 2041 for separating the sample
particles, oven-drying the sample, and cooling it to room temperature.
B.
Operation
1.
2.
3.
Weigh the empty pycnometer without the lower water inlet hose
and without the gauge and hose assembly on the top. Designate
this weight as "B."
Place the prepared sample in the pycnometer and weigh the
sample and pycnometer together, designating this weight as "C."
The weight of the sample is A = C - B.
Install the gauge and hose assembly and connect the aspirator to
both the pycnometer and the laboratory water faucet, as shown in
Fig. 1.
Note: Instead of the aspirator, a vacuum pump may be connected
directly (through a water trap) to the hose.
4.
5.
6.
With the water inlet valve closed, connect the water inlet hose to
both the pycnometer and the laboratory water supply, as shown in
Fig. 1.
To begin operating the aspirator, turn on the water faucet (or
vacuum pump) to create a vacuum of at least 10" Hg in the
pycnometer.
Open the water inlet valve (see Fig. 1) to let water in at a
temperature of about 77oF (25oC). Fill the pycnometer up to about
an inch (25.4 mm) below the top of the sphere and then close the
water inlet valve.
7.
Continue applying vacuum and maintain a residual pressure of 1.2"
(30 mm) Hg or less for 5 to 15 minutes. During this vacuum period,
agitate the pycnometer vigorously by shaking it with both hands at
intervals of about 2 minutes to release all the air bubbles.
2
Distributor:
ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
International
Open the water inlet valve to fill the pycnometer to the very top
8.
without leaving any air space. Be careful not to turn off the
vacuum. Close the water inlet valve.
9.
Using the quick-disconnect, detach the gauge-hose assembly from
the top of the pycnometer.
10.
If there is any air trapped in the pycnometer, reconnect the
aspirator and vacuum gauge (using the quick-connect) and let more
water in.
11.
12.
13.
Close the water inlet valve.
Disconnect the water inlet hose from the pycnometer.
Within 10 + 1 minutes after step 8, weigh the pycnometer while it is
still filled with water (de-aired) and the sample. Record this weight
as "E".
14.
Remove the lid and drain the water from the pycnometer. Remove
the asphalt sample, clean the inside, and clamp the lid on. Re-
install the gauge and hose assembly, reconnect the water inlet
hose, and refill completely with water following steps 5 to 8.
15.
16.
Detach the gauge assembly and the water inlet hose.
Weigh the pycnometer filled with water only, within 10 + 1 minutes
after releasing all of the air bubbles and filling completely per step
8. Record this weight as "D".
Note: It is recommended that a graph of weight versus temperature
for the pycnometer filled with de-aired water be made, so that the
value of D can be taken from this graph for any temperature in the
laboratory. This will eliminate steps 14 to 16. See Section III
Calibration.
3
Distributor:
ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
International
V.
CALCULATIONS
If the test temperature is within +3° or -5°F of 77°F (+ 1.7° or - 2.8°C of 25°C),
the following equation can be used to determine the maximum specific gravity of
the sample, with an error of 0.001 points or less due to thermal effects:
Where:
A = Mass of the dry sample in air (grams)
D = Mass of container when filled with water at 77°F (25° C) (grams)
E = Mass of container filled with both water and sample at 77°F (25°C)
(grams)
Note: If the test temperature differs significantly from the recommended
77°F (25°C), the formula should be adjusted for thermal effect as
follows:
Where:
A =
Mass of dry sample in air (grams)
F =
Mass of pycnometer filled with water at test temperature (grams)
G = Mass of pycnometer filled with both water and sample at test
temperature (grams)
H = Correction for thermal expansion of bitumen (grams)
dw = density of water at test temperature, Mg/m3
0.9970 = density of water at 77°F (25°C), Mg/m3
Values of H and dw may be obtained from the ASTM graphs in Fig. 2. For more
details, see ASTM D 2041.
VI.
TROUBLESHOOTING
4
Distributor:
ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
International
A.
Pycnometer Not Getting Vacuum
1.
Check 'O' ring to make sure it is clean and in good shape. If not,
contact ELE/Soiltest for a replacement 'O' ring.
2.
3.
Check to make sure the water inlet valve is on tight.
Tighten the stopcock nut (at bottom of stopcock) of the water inlet
valve.
B.
Air Bubbles Entering from the Water Inlet Valve
1.
2.
Check to make sure the water inlet valve is on tight.
Tighten the stopcock nut (at bottom of stopcock) of the water inlet
valve.
C.
D.
Clogged In-Line Filter
Replace the filter assembly.
Too Many Air Bubbles in Water
1.
Air bubbles come from dissolved air in water. Check for this by
opening water inlet valve (keeping the water inlet hose connected
to the water supply) after you have gone through Step 8 of the
operating procedure. The air bubbles should dissolve back in water
at atmospheric pressure.
2.
Try filling the pycnometer with boiled water (after it has been
cooled).
If problem still persists, call ELE/Soiltest Service Department for
assistance.
VII. ACCESSORIES/OPTIONS
5
Distributor:
ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
International
45-9301 (AP-131) Filtering Kit. Functions as water trap for vacuum pump.
45-9320 (AP-134) Manometer
VIII. SPECIFICATIONS
Capacity
Approximately 10 liters; 6 kg (13.2 lbs) sample weight
Lightweight polycarbonate, with transparent upper half
2" (50.8 mm) diameter; 30" x 0.5 " Hg
Construction
Gauge
Aspirator
Plastic; 3/8" pipe thread (included)
Connections
Water inlet valve; quick disconnect for vacuum gauge and
hose
Dimensions
Weight
10-3/4" (273 mm) o.d. x 16" (406 mm) h.
Net 8 lbs (3.6 kg)
6
Distributor:
ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
International
FIGURE 1
.
7
Distributor:
ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
International
GRAPHS
8
Distributor:
ELE International, Ltd.
Chartmoor Road Chartwell Business
Park
Leighton Buzzard, Bedfordshire
LU7 4WG England
Phone: + (0) 1525 249200
Fax: + (0) 1525 249249
E-Mail: [email protected]
ELE International, Inc.
PO Box 608
Loveland, CO 80539
USA
Phone: (970) 663-9780
Fax: (970) 663-9781
E-Mail: [email protected]
Download from Www.Somanuals.com. All Manuals Search And Download.
|