|
|
|
Title: Effects of Asphalt Source, Asphalt Grade, and Inclusion of Additives on Asphalt Foaming Characteristics
Accession Number: 01587434
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Warm-mix asphalt (WMA) produced by foaming is widely used in the asphalt paving industry and is the largest segment of the WMA market in the United States. To produce foaming, a small quantity of cold water is injected into hot asphalt to cause a reduction in the asphalt viscosity and improve the coating of the aggregate particles. The primary objectives of the study reported here were to compare the foaming characteristics of asphalts of different sources and grades and to evaluate the effect of certain additives on the characteristics of the foamed asphalt. To characterize the foamed asphalt, a laser distance meter (LDM) was used in the laboratory. The LDM was used as an alternative to the dipstick (traditionally used in foaming measurements) because of its better repeatability and accuracy. The LDM results indicated that the foaming characteristics depended on the source and performance grade of the asphalt. The addition of a foaming-enhancing additive had a significant effect on the foaming characteristics of most asphalt. However, no obvious difference in foaming characteristics was observed when warm-mix additives were used as part of the foaming process.
Monograph Title: Monograph Accession #: 01587029
Report/Paper Numbers: 15-3571
Language: English
Authors: Zhang, JunArambula, EdithNewcomb, DavidBhasin, AmitLittle, DallasPagination: pp 76–83
Publication Date: 2015
ISBN: 9780309369312
Media Type: Print
Features: Figures
(13)
; References
(12)
; Tables
(2)
TRT Terms: Subject Areas: Highways; Materials; Pavements; I30: Materials
Files: TRIS, TRB, ATRI
Created Date: Dec 30 2014 1:11PM
More Articles from this Serial Issue:
|
