00715663

Component

http://onlinepubs.trb.org...trr/1995/1515/1515-006.pdf

https://scholar.google.co...nche&publication_year=1995

In order to dispose of old tires crumb rubber modified asphalts have been introduced. However, the research done on these products shows that they do not necessarily enhance the field applications. Since carbon black can be extracted from old tires, it might be a better way to recycle tires. This study presents carbon black (CB) from pyrolized tires as an asphalt modifier. CB was compared to aggregate fillers and ball clay, and mixed with asphalt to form mastics with similar weight contents (20 to 40%). If the high temperature (above 65 deg C) stiffening effect of the fillers is highly filler dependent, the low temperature rheological behavior is similar for all fillers. At temperatures below 65 deg C, the same rheological model can fit all experimental data points. However, a low temperature toughening effect was only found in the case of mineral fillers. This was attributed to the aggregate/asphalt interface. This interface is too weak in the case of CB and clay to toughen the asphalt at low temperatures and to prevent particle aggregation at high temperatures. As a result CB seems to be a good rheology modifier for binders already having a good low temperature behavior, such as polymer-modified asphalts.

This paper appears in Transportation Research Record No. 1515, Recycled Tire Rubber and Other Waste Materials in Asphalt Mixtures. 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

01399810

English

p. 47-55

1995

Transportation Research Record

Figures (9) ; References (13) ; Tables (2)

Asphalt mixtures; Carbon black; Fillers (Materials); Polymer asphalt; Rheology; Solid wastes; Tires

Modifiers; Scrap tires

Highways; Materials; Vehicles and Equipment; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Jan 26 1996 12:00AM

• EVALUATION OF RUBBER MODIFIED ASPHALT DEMONSTRATION PROJECTS
• LABORATORY EVALUATION OF CRUMB RUBBER MODIFIED MIXTURES DESIGNED USING TXDOT MIXTURE DESIGN METHOD
• MECHANISTIC EVALUATION OF ASPHALT CONCRETE MIXTURES CONTAINING RECLAIMED ROOFING MATERIALS
• MIX DESIGNS AND AIR QUALITY EMISSIONS TESTS OF CRUMB RUBBER MODIFIED ASPHALT CONCRETE
• MODIFICATION OF ASPHALT BINDERS AND ASPHALT CONCRETE MIXES WITH CRUMB AND CHEMICALLY DEVULCANIZED WASTE RUBBER
• USE OF GROUND TIRE RUBBER IN ASPHALT CONCRETE PAVEMENTS--A DESIGN AND PERFORMANCE EVALUATION
• USE OF INCINERATOR RESIDUE IN ASPHALT MIXTURES