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Title: Blending Measurements in Mixtures with Reclaimed Asphalt: Use of Scanning Electron Microscopy with X-Ray Analysis
Accession Number: 01616128
Record Type: Component
Record URL: Availability: Find a library where document is available Abstract: A major impediment to the widespread use of asphalt concrete with a high content of reclaimed asphalt pavement (RAP) is uncertainty in the degree of blending between the RAP and the fresh binder. Furthering knowledge concerning the blending between RAP and fresh binder has been difficult because of the lack of an experimental method to quantify the degree of blending in asphalt concrete. This study introduces energy dispersive X-ray spectroscopy (EDS) scanning electron microscopy (SEM) as a means to analyze the degree of blending between RAP and fresh materials in asphalt concrete. EDS allows for mapping the distribution and relative proportion of elements in a sample, hence, allowing for the detection of the distribution of elements in an asphalt concrete specimen. Fresh and RAP binders will have a similar elemental composition. Therefore, titanium dioxide in a fine powder form (0.15-mm particles) is blended with the fresh binder as a tracer before the production of asphalt concrete to enable delineation of the RAP and fresh binders using EDS SEM. The efficacy of EDS SEM for quantifying the degree of blending between RAP and fresh binders in asphalt concrete is demonstrated with two high RAP content mixtures.
Monograph Title: Monograph Accession #: 01616111
Report/Paper Numbers: 16-4004
Language: English
Authors: Castorena, CassiePape, SonjaMooney, CharlesPagination: pp 57-63
Publication Date: 2016
ISBN: 9780309441148
Media Type: Print
Features: Figures; Photos; References; Tables
TRT Terms: Subject Areas: Highways; Materials; Pavements
Files: TRIS, TRB, ATRI
Created Date: Nov 4 2016 8:47AM
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