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Appendix C Appendix C
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AASHTO
T 30-03
Section 6.2 thru 6.5 Samples are not routinely washed

AASHTO
T 40-02
All sampling during production shall be from the ground tank. Upon request by the DRM, a 1-qt sample
shall be taken after 1-gal (minimum) is drained off.

AASHTO
T 164-05
Method A
APPARATUS:
Section 5 ConnDOT in addition to AASHTO apparatus includes infrared lamp and substitutes
graduated cylinder with a 1000 ml flask.
Section 6. Reagent. Must be Conn D.O.T. approved *******
Article 8.2.1 all classes of HMA except Class 4 are scooped from the sample container.
Section 9.1 and 9.2 Moisture content is periodically determined on production samples as plant
conditions require.
Section 11.1 See Section 9.0 AASHTO T 164
Section 11.3 and 11.5 Filter paper is dried and weighed in field using heat lamp or oven when an ash
test is performed.
Section 11.6.2 Extract is collected if an ash test is to be performed
Section 11.6.2 Performed on selected samples only
Section 11.6.2 A three test running average is used to correct for total binder in HMA.

AASHTO
T 166-05
NOT MODIFIED

AASHTO
T 168-03
Section 4.1: Samples are taken at one point in the pile instead of two samples 180 degrees from each
other. All classes of bituminous concrete except Class 4 are scooped from the sample container
instead of remixing and quartering. (Method verified by laboratory study).
Section 4.3: Samples from a hauling vehicle are taken from only one point instead of four as specified.
Selection of Samples: Sampling is equally important as the testing, and the sampler shall use every
precaution to obtain samples that are truly representative of the bituminous mixture.

Box Samples: In order to enhance the rate of processing samples taken in the field by construction or
maintenance personnel, the box samples requested by laboratory will immediately be given
Laboratory numbers. The samples will be tested in the order received and data processed to be
determine conformance to material specifications and to prioritize inspections by laboratory personnel.
The only exception to this procedure will be if the field inspectors suspect nonconformance of material
specifications and request priority testing for acceptance or rejection.


AASHTO
T-170-00

Recovery of Asphalt from Solution by Abson Method
Delete the referenced section and replace with the language shown:
5.0 Apparatus
Centrifuge batch unit capable of exerting a minimum centrifugal force of 770 times gravity or a
continuous unit capable of exerting a minimum force of 300 times gravity.

5.1. Centrifuge tubes- a 250ml wide mouth bottles
5.2. Extraction Flasks- a 500ml three angle necks and joints flask with 24/40 side necks.
5.3.2. Glass Tubing- Heat resistant glass tubing, having 10mm inside diameter and a gooseneck
shaped delivery tube, for connecting the flask to the condenser.

5.3.3. Inlet Aeration Tube- 180mm in length having a 6mm outside diameter with a 10-mm bulb
carrying six staggered holes approximately 1.5 mm in diameter.
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5.3.4. Electric Heating Mantle- Variable transformer to fit a 500 ml flask.
5.3.5 Water-jacketed Condenser, Alliham type, with 200 mm
minimum jacket length.

5.3.6. Thermometer- an ASTM low distillation thermometer having a range of 2 to 300_C (30 to
580_F), respectively, and conforming to the requirements in ASTM specification E 1

5.3.7. Gas Flow Meter- A type capable of indicating a gas flow of up to 1000 ml per minute.

5.3.8. Corks. NO. 20

5.3.9. Flexible Elastometric Tubing-

5.3.10. Separatory Funnel 500 ml capacity or larger

6.0. Reagents and Materials
6.1. Carbon Dioxide Gas- A pressurized tank, with pressure-reducing valve. The solvent for extracting
the asphalt from the mixtures should be reagent grade trichloroethylene or methylene chloride. Other
solvents may affect the bitumen to change its properties significantly from that as it exists in the
mixture.

8. Sample
8.1. The sample shall consist of the solution from previous extraction of a sample of sufficient mass to
result in approximately 105 to 110 g of recovered bitumen.

9. Procedure
9.1. The entire procedure, form the start of the extraction to the final recovery, must be completed
within 8 hours.

9.2 Centrifuge the solution from the previous extraction for a minimum of 30 minutes at 770 times
gravity (approx. 2700rpm) in 250 wide mouth bottles.
Assemble the apparatus as shown in figure 1 with the separatory funnel in the thermometer hole in the
cork. Lower the aeration tube so that the bulb is in contact with the bottom of the flask. Fill the
separatory funnel with the centrifuged solution and open the stopcock to fill the flask approximately
one-half full of solvent mixture. Apply low heat to the flask and start distillation. Introduce carbon
dioxide gas at a low rate (approx. 100mL/minute) to provide agitation and prevent foaming. Adjust the
funnel stopcock to introduce fresh solvent at a rate that will keep the flask approximately one half full
during distillation, adding additional solvent mixture to the funnel into all solvent has been introduced
into the distillation flask. When the temperature reaches 157 to 160_C (315 to 320_F), increase the
carbon dioxide gas flow to approximately 900mL/minute. Maintain this gas flow rate for 20 minutes
while also maintaining the temperature of the residue in the flask at 160 to 166_C (320 to 330_F).

AASHTO
T 176-02

Section 4.2 Obtain enough material to yield slightly more than eight 85 ml (3 oz) tins

Section 5. Procedure
5.4.1 Samples must be run at 45 seconds and 10 minutes
5.4.2 Omit manual shaker method,
5.4.3 Omit Hand Method


AASHTO
T 195-98

Section 3.3 only one truck load of mixture is sampled. Samples are taken from opposite sides of the
load.


AASHTO
Section 6.4 Bowl is suspended 2 minutes prior to reading rather than 10 minutes. This makes no
Appendix C
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T 209-05
significant difference in results.
8.3 Omit Pycnometer method.
AASHTO
T 238

Section 1.2 Method C - Air gap is not used (Backscatter)

Section 10.3.7 At each test location 4 readings shall be taken and averaged. Each reading shall be a
minimum of 30 seconds.

AASHTO
T 245-04
Section 3.3.1 A molding temperature of 140 to 146 C is used

Section 3.5.1 Seventy-five (75) blows per side are used on Classes
1 and 12, per ConnDOT design requirements

Section 3.1 for production testing: one specimen is molded for each extraction test (generally five
molds per day) for production over 275 metric tons/day. Other mixtures: two specimens per extraction
test.

AASHTO
T 275-00
Replaced by AASHTO TP-69-04

AASHTO
T 283-03
This protocol shall be performed at the HMA plant in accordance with section 7 on class 12.5 (all
applicable levels) by the Contractor or their representative at a time designated by the DRM

AASHTO
M156
AASHTO M156 (M)
STANDARD SPECIFICATIONS FOR BITUMINOUS MIXING PLANTS

Terminology

Batch Plant: A manufacturing facility for producing bituminous paving mixtures that proportions the
aggregate and bituminous constituents into the mix by weighed batches, adds bituminous material by
either weight or volume, and mixes the blend.

Drum Mix Plant: A manufacturing facility for producing bituminous paving mixtures that continuously
proportions aggregates, heats and dries them in a rotating drum, and simultaneously mixes them with a
controlled drum, and simultaneously mixes them with a controlled amount of bituminous material. The
same plant may produce cold-mixed bituminous paving mixtures without heating and drying the
aggregate.

4. REQUIREMENTS FOR ALL PLANTS

4.1 Uniformity The plant shall be capable of uniformly combining and mixing various sizes of
aggregate from stockpiles reclaimed asphalt pavement, if required, and bituminous material.
4.1.1 Plants producing material during nighttime hours shall have suitable lighting at the sample
platform and surrounding areas for the inspector to obtain samples safely.
4.1.2. The plant shall have a capacity of at least producing 125 tons per hour, and a minimum of four
(4) cold-feed storage bins unless otherwise approved by the Director of Research and
Materials.
4.1.3. The cold-feed storage bins shall be constructed and loaded by equipment and methods that
prevent intermixing or contamination of the cold-feed aggregates.
4.1.4 HMA mixtures may be stored in bins especially designed for that purpose at the mixing plant
site.
4.1.5. The HMA mixtures used from the bins shall be of a uniform quality and meets all the
specification requirements for the particular mix involved.
4.1.6. Scalping screens or similar devices shall be installed in the cold-feed system, to remove any
debris or other foreign material in excess of 4 inches.
4.1.7. Individual bins shall be labeled for the ag