Long Term Pavement Performance Project Laboratory Materials Testing and Handling Guide

Protocol H02L
Recovery of Asphalt from Solution by Abson Method (AE01S)

This LTPP protocol covers the recovery of asphalt cement from cores recovered from pavements as a part of the SPS-3 studies. The recovery shall be performed in accordance with AASHTO T170-89I, Standard Method of Test for Recovery of Asphalt from Solution by Abson Method.

The extraction shall be performed in accordance with Method A of AASHTO T164-89I, Standard Method of Test for Quantitative Extraction of Bitumen from Bituminous Paving Mixtures, except as designated below. Reagent-grade trichloroethylene (TCE) should be used as the reagent required in paragraph 4, however, at the discretion of the COTR, the use of technical-grade TCE (type 1) may be allowed under the following circumstances:

1. The laboratory has passed the AMRL certification to perform AASHTO T164 within the last five years. A copy of the certification shall be sent to the COTR.
2. The laboratory engages an independent laboratory to analyze and verify that its stores of technical-grade TCE meet Federal Specification O-T-634. A copy of the results of this independent verification shall be sent to the COTR.

The moisture in the sample shall be tested in accordance with AASHTO T110-88I, Standard Method of Test for Moisture or Volatile Distillates in Bituminous Mixtures, except as designated below. Xylene will be used as the solvent required by paragraph 2.4. Tests listed in Paragraph 6 will be omitted. Instead of the requirements of Paragraph 3, the following shall be used. The top one inch of each core will be removed in accordance with LTPP Protocol H01L and used in the extraction and subsequent test. The moisture content will be determined from the next 1-inch (25-mm) layer, which must also be removed using an air-cooled diamond blade saw.

This protocol includes no testing of the extracted material. All tests on the extracted material are required by Protocols H03L and H04L.

The results will be recorded on LTPP Test Form H01. Comments shall include LTPP standard comment code(s) as shown in Section 4.3 of this Guide, and any other note as needed. Additional codes for special comments associated with the testing are given below.

LTPP LABORATORY MATERIAL HANDLING AND TESTING

LABORATORY MATERIAL TEST DATA

ABSON RECOVERY

LAB DATA SHEET H01

ASPHALT CONCRETE

LTPP TEST DESIGNATION AE01S/LTPP PROTOCOL H02L

LABORATORY PERFORMING TEST: _____________________________________________________________

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 ___

2. LABORATORY TEST NUMBER __

3. LOCATION NUMBER __ __ __

4. LTPP SAMPLE NUMBER __ __ __ __

5. TEST RESULTS

      (a) MOISTURE IN MIXTURE, % __ __.__

      (b) ASPHALT CONTENT, % __ __.__

      (c) ASH CONTENT, % __.__

6. COMMENTS

      (a) CODE ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___

      (b) NOTE _______________________________________________________

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