Long Term Pavement Performance Project Laboratory Materials Testing and Handling Guide

Protocol P23
Test Method for Specific Gravityof Extracted Asphalt Cement (AE03)

This LTPP protocol covers the determination of the specific gravity of asphalt cements by use of a pycnometer.

This test shall be carried out in accordance with AASHTO T228-90 with the exception of some of the sections of the reference standard which have been modified as presented below. In all other sections, the test standard (AASHTO T228-90) shall be followed as written. The test shall be carried out on asphalt cement extracted from AC core and block specimens as well as uncompacted mixtures of both virgin and recycled asphalt-aggregate mixtures obtained from test sections included in the LTPP experiments.

1. SCOPE

This method covers the determination of the specific gravity of extracted asphalt cement by use of a pycnometer.

2. SPECIFIC GRAVITY

The specific gravity of extracted asphalt cements shall be expressed as the ratio of the mass of a given volume of the material at 60°F (15.6°C) to that of an equal amount of water at the same temperature.

9. REPORT

Record the following information on Form T23.

9.1 Sample identification shall include: Laboratory Identification Code, Region, State, State Code, SHRP ID, Field Set Number, Sampling Area Number, Layer Number, Location Number and LTPP Sample Number.

9.2 Test identification shall include: LTPP Test Designation, LTPP Protocol Number, Laboratory Test Number and the Test Date.

9.3 Test Results

9.3.1 Record the specific gravity of the test sample to the nearest third decimal place.

9.3.2 Comments shall include LTPP standard comment code(s) as shown in Section 4.3 of this Guide, and any other note as needed.

LTPP LABORATORY MATERIAL HANDLING AND TESTING
LABORATORY MATERIAL TEST DATA
SPECIFIC GRAVITY OF EXTRACTED ASPHALT CEMENT
TEST DATA SHEET T23

ASPHALT CONCRETE LAYER (ASPHALT CEMENT PROPERTIES)
LTPP TEST DESIGNATION: AE03/LTPP PROTOCOL P23

LABORATORY PERFORMING TEST:______________________________________________________________PRIVATE

LABORATORY IDENTIFICATION CODE: __ __ __ __

REGION _________________ STATE ___________________ STATE CODE __ __

EXPERIMENT NO _____ SHRP ID __ __ __ __

SAMPLED BY: ______________________________________________ FIELD SET NO. __

DATE SAMPLED: __ __-__ __-__ __ __ __ SAMPLING AREA No: SA- _____

1. LAYER NUMBER (FROM LAB SHEET L04 AND FORM T01B) __

2. LOCATION NUMBER __ __ __

3. LABORATORY TEST NUMBER __

4. LTPP SAMPLE NUMBER __ __ __ __

5. SPECIFIC GRAVITY __. __ __ __

6. COMMENTS

      (a) CODE __ __ __ __ __ __ __ __ __ __ __ __

      (b) NOTE _______________________________________________________

7. TEST DATE __ __-__ __-__ __ __ __