Humboldt H-1050 User Manual

H-1050_man_1111

product manual

H-1050

Ductility Machine

General

The ductility test is a measure of the distance to which a bituminous material
will elongate before breaking when two ends of a standard specimen are pulled
apart at a uniform rate.
The suggested method of test is covered by ASTM D113 and AASHTO T51. In
the absence of any specified variations in the test method, the test procedure as
outlined in these instructions maybe followed.

Installation

These units are shipped complete, ready for operation. Standard units are
supplied for operation on 110 volt, 60 cycles, A.C. operation. Be sure the line
cord is plugged into the proper-grounded electrical outlet. The unit should
be leveled and mounted on a flat surface. For best results the unit should be
mounted on four rubber pads.

Sample Preparation

1. Unless otherwise specified the test should be conducted at a temperature of
25± 0.5°C (77± 0.9°F) and with a speed of 5 cm per minute ± 5.0 percent.
When a low-temperature ductility test is desired, the test should be made at
a temperature of 4°C (39.2°F) and at a rate of pull or 1 cm per minute.

2. Assemble the mold on the brass plate. To prevent the material under test
from sticking, it is suggested that the surface of the plate and interior
surfaces of the sides of the mold be thoroughly amalgamated. Make sure
the plate is perfectly flat and level so that bottom surface of the mold will
touch it throughout.

3. Completely melt the bituminous material to be tested until thoroughly fluid
by heating it in an oil bath maintained at the minimum temperature needed
to properly liquefy the sample, when paving asphalt cements are to be
tested, the oil bath should be maintained at a temperature of 150 to 160°C
(302 to 320°F).

4. Strain the melted sample through a No. 50 sieve. After stirring thoroughly,
pour into the mold, taking care not to disarrange the parts of the mold. Pour
the material back and forth in a thin stream from end to end of the mold
until the mold is more than level full.

5. Allow the mold containing the material to cool to room temperature
for a period of 30 to 40 minutes. Then place the mold in the water bath
maintained at the specified temperature of test for 30 minutes. Cut off the
excess bitumen with a hot straight edged knife or spatula to make the mold
level full.

6. Place the brass plate and mold, with the briquette specimen, in the water
bath and keep them at the specified temperature for a period of from 85 to
95 minutes. After the elapsed period of time, remove the briquette from the
plate, detach the side pieces, and immediately test the briquette.

Test Procedure

1. Fill the trough with water until the level reaches a point where it will cover
the test specimen by at least 2.5 cm both above and below.

2. Bring the water to the desired test temperature. During the test, the water
should be kept at the specified temperature within ±0.5oC (0.9oF).

3. To adjust the speed of carriage move knurled knob at the end of the sliding
gear all the way in for ¼ cm per minute, half way out for 1 cm per minute
and all the way out for 5 cm per minute. Be sure to locate positioning lever
in the proper slot-this will not only locate, but will also lock the gears in their
exact alignment.

4. Place the specimen in position by setting one end of the specimen mold
onto one of the three mounting pins on the end plate. Set the other end of
the mold onto the corresponding pin on the movable carriage.

5. Move the length indicator to the zero position by loosening the adjusting
screw.

6. Measure the distance in centimeters through which the clips have been
pulled to produce rupture.

7. At the completion of the test, return the carriage to the starting position.

Note: If the test material comes in contact with the surface of the water or the
bottom of the bottom of the bath, the test is not considered satisfactory. The
specific gravity of the bath may be adjusted by the addition of either methyl
alcohol or sodium chloride to prevent the bituminous from coming to the surface
of the water or touching the bottom of the bath during the test.

Test Report

The test is considered normal when the rupture occurs at the point where the
thread has practically no cross-sectional area.

The average of three normal tests is reported as the ductility of the sample.

Maintenance

All bearing surfaces should be kept clean. the oil cups provide for adding SAE
Grade 30 lubricating oil. Threaded lead screw should be kept clean and properly
greased to ensure proper carriage level travel. Use NGLI #2 Extreme Pressure
Lithium Grease or equivalent on the threads. When not in use, remove line cord
from the outlet to prevent misuse or improper handling.

Gear Housing Frame, H-1050.8

Carriage Assembly, H-1050.17

Warranty

Humboldt Mfg. Co. warrants its products to be free from defects in material or
workmanship. The exclusive remedy for this warranty is Humboldt Mfg. Co.,
factory replacement of any part or parts of such product, for the warranty of this
product please refer to Humboldt Mfg. Co. catalog on Terms and Conditions
of Sale. The purchaser is responsible for the transportation charges. Humboldt
Mfg. Co. shall not be responsible under this warranty if the goods have been
improperly maintained, installed, operated or the goods have been altered or
modified so as to adversely affect the operation, use performance or durability
or so as to change their intended use. The Humboldt Mfg. Co. liability under
the warranty contained in this clause is limited to the repair or replacement of
defective goods and making good, defective workmanship.

Humboldt Mfg. Co.

875 Tollgate Road
Elgin, Illinois 60123 U.S.A.

Testing Equipment for

HUMBOLDT

www.humboldtmfg.com

U.S.A. Toll Free: 1.800.544.7220

Voice: 1.708.456.6300

Fax: [phone]

Email: [e-mail]

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