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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

Report
This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-HRT-04-111
Date: February 2005

Evaluation of The Laboratory Asphalt Stability Test

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FOREWORD

The Laboratory Asphalt Stability Test (LAST) was proposed by the researchers of the National Cooperative Highway Research Program (NCHRP) 9-10 program as a possible new method to evaluate the storage stability of modified asphalts. Federal Highway Administration (FHWA) was assigned the responsibility for evaluating the LAST device. This involved three tasks:

The modified asphalts used in NCHRP 90-07 were investigated in this study. These included elastomers, plastomers, elasto-plastomers, and crumb rubber. The eight binders chosen all met the Superpave performance grading of 70-28 (PG70-28). This report details the work at FHWA's Turner-Fairbank Highway Research Center in evaluating the thermal stability of modified binders using the LAST device.

Paul Teng, Director

Office of Infrastructure Research and Development

Notice

This document is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained in this document. This report does not constitute a standard, specification, or regulation.

The U.S. Government does not endorse products or manufacturers. Trademarks or manufacturers' names appear in this report only because they are considered essential to the objective of the document.

Quality Assurance Statement

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TABLE OF CONTENTS

1. INTRODUCTION

2. EXPERIMENTAL DESIGN

3. RESULTS AND DISCUSSION

4. CONCLUDING REMARKS

APPENDIX A

APPENDIX B

APPENDIX C

ACKNOWLEDGEMENTS

REFERENCE

ADDITIONAL SOURCES

 

LIST OF FIGURES

LIST OF TABLES

 

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Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101