Long Term Pavement Performance Project Laboratory Materials Testing and Handling Guide

Protocol P29
Test Method for Determining The Fracture Propertiesof Asphalt Binder in Direct Tension (AE09)

This LTPP Protocol covers the procedures for determining the failure strain and failure stress of asphalt binders by means of a direct tension test. The test shall be carried out in accordance with AASHTO T314-02 as described by the following.

18. REPORT

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

18.2 Test Identification shall include: LTPP Test Designation, LTPP Protocol Number, Laboratory Test Number, and Test Date.

18.3 General test and sample information:

18.3.1 Material type should be stated as Original, RTFP, PAV, or Field Aged.

18.3.2 For field aged specify time since construction, months.

18.3.3 Specimen cross-sectional area, mm².

18.3.4 Gauge length of specimen, mm.

18.3.5 Specimen conditioning time, minutes (it is assumed that all specimens will be conditioned at the same time).

18.3.6 AC performance grade.

For each test specimen, record the following information:

18.3.7 Test temperature, °C.

18.3.8 Rate of elongation, mm/min.

18.3.9 Percent failure strain, mm/mm x 100.

18.3.10 Failure Stress, MPa.

18.3.11 Peak load, N.

18.3.12 Fracture, yes or no.

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

LTPP LABORATORY MATERIAL HANDLING AND TESTING
LABORATORY MATERIAL TEST DATA
FRACTURE PROPERTIES OF ASPHALT BINDER
IN DIRECT TENSION
LAB DATA SHEET T29

ASPHALT CONCRETE LAYER
LTPP TEST DESIGNATION: AE09/LTPP PROTOCOL P29

LABORATORY PERFORMING TEST:____________________________________________________________

LABORATORY IDENTIFICATION CODE:__ __ __ __

REGION:_________________ STATE:__________________ STATE CODE: __ __

EXPERIMENT NO:_____ SHRP ID: __ __ __ __

SAMPLED BY:____________________________________________ SAMPLE AREA No: SA-__ __

DATE SAMPLED:__ __-__ __-__ __ __ __ FIELD SET NO.: __

SAMPLE LOCATION NUMBER__ __ __ LTPP SAMPLE NUMBER __ __ __ __

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

LTPP LABORATORY TEST NUMBER:__ TEST DATE:__ __-__ __-__ __ __ __

1. Material type (Original = 1, RTFo = 2, PAV = 3, Field Aged = 4) __

2. For field aged, Time since construction, months __ __ __.__

3. SEQ CHAPTER \h \r 1Specimen Cross-Sectional Area (mm²) __.__

4. SEQ CHAPTER \h \r 1Gauge Length (mm) __ __.__

5. SEQ CHAPTER \h \r 1Conditioning Time (minutes) __ __ __

6. AC performance grade PG __ __ - __ __

Note 1: Out of six specimens tested, discard the lowest two values of failure stress, strain, and energy. Report the remaining four specimen's data here.

SEQ CHAPTER \h \r 1 Note 2: Please attach raw data from direct tension device.

7. COMMENTS

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

      (b) NOTE _______________________________________________________