00669045

Component

http://onlinepubs.trb.org...trr/1994/1436/1436-013.pdf

https://scholar.google.co....+Ho&publication_year=1994

The effect of liquid antistrip additives on the properties of polymer-modified asphalt binders and mixtures as related to rutting and moisture damage was investigated. The use of polymer-modified asphalts has increased in recent years because of their ability to resist rutting at high temperatures and improve fatigue resistance at low temperatures. In the Houston area liquid antistrip additives are used for almost all the mixtures to mitigate moisture damage. Liquid antistrip additives have been shown to soften certain asphalts. Whether liquid antistrip additives soften polymer-modified asphalts, thus degrading the rut resistant capability of polymer-modified asphalt, has become a concern to highway engineers. Asphalt binder properties known to have a bearing on rutting were evaluated on polymer-modified asphalts with three commercial liquid antistrip additives. Moisture damage of the mixture was evaluated using the conditioned-unconditioned indirect tensile test. In general, the liquid antistrip additives reduced the viscosity and softening point of polymer-modified asphalts, especially at high dosage. This will make polymer-modified asphalt binders more rut susceptible. For polymer-modified asphalt mixtures, increasing the dosage of liquid antistrip additives did not improve resistance to moisture susceptibility. On the basis of the investigation, lower dosages of liquid antistrip additives are recommended for polymer-modified asphalts than would be required for straight asphalts.

This paper appears in Transportation Research Record No. 1436, Asphalt Concrete Mix Materials. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01401249

English

p. 108-114

1994-10

Transportation Research Record

030905513X

Figures (9) ; References (6) ; Tables (3)

Antistrip additives; Asphalt mixtures; Binders; Loss and damage; Moisture damage; Polymer asphalt; Rutting; Softening point; Tension tests; Traffic mitigation; Viscosity; Water

Indirect tensile test; Mitigation

Houston (Texas)

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB

Nov 23 1994 12:00AM

• DESIGNING ASPHALT PAVEMENTS FOR EXTREME CLIMATES
• EFFECT OF COMPOSITION ON ASPHALT RECYCLING AGENT PERFORMANCE
• EMPIRICAL EVALUATION OF OLIVE HUSK IN ASPHALT CEMENT BINDER AND BITUMINOUS CONCRETE
• EVALUATION AND CHARACTERIZATION OF A RUBBER-MODIFIED HOT MIX ASPHALT PAVEMENT
• EVALUATION AND FIELD VALIDATION OF PROPOSED STRATEGIC HIGHWAY RESEARCH PROGRAM BINDER SPECIFICATION FOR THERMAL CRACKING
• EVALUATION OF NATURAL SANDS USED IN ASPHALT MIXTURES
• IMPROVED LOW-TEMPERATURE FRACTURE PERFORMANCE FOR RUBBER-MODIFIED ASPHALT BINDERS
• INVESTIGATION OF LABORATORY AGING PROCESSES OF ASPHALT BINDERS USED IN FLORIDA
• INVESTIGATION OF RUTTING OF ASPHALT SURFACE LAYERS: INFLUENCE OF BINDER AND AXLE LOADING CONFIGURATION
• LOW-TEMPERATURE FRACTURE TOUGHNESS OF POLYETHYLENE-MODIFIED ASPHALT BINDERS
• RHEOLOGICAL AND RHEO-OPTICAL CHARACTERIZATION OF ASPHALT CEMENT AND EVALUATION OF RELAXATION PROPERTIES
• SOFTENING OF ASPHALTS IN DILUTE SOLUTIONS AT PRIMARY DISTILLATION CONDITIONS
• STUDY OF THE FATIGUE OF ASPHALT MIXES USING THE CIRCULAR TEST TRACK OF THE LABORATOIRE CENTRAL DES PONTS ET CHAUSSEES IN NANTES, FRANCE
• USE OF RUBBER IN ASPHALT PAVEMENTS: KANSAS EXPERIENCE