Precision of biodegradable solvents in determining asphalt content and aggregate gradation
Title:
Precision of biodegradable solvents in determining asphalt content and aggregate gradation
Author:
Jenq, Yeou-Shang.
Personal Author:
Publication Information:
Columbus, Ohio : Ohio State University, Dept. of Civil Engineering ; [Springfield, Va. : Available through the National Technical Information Service, 1994]
Physical Description:
xii, 87 leaves : ill. ; 28 cm.
General Note:
Prepared in cooperation with the Ohio Dept. of Transportation and the Federal Highway Administration.
"December 1, 1994."
Contents:
Preface -- Summary -- Statement of the problem -- Factors affecting the effectiveness of extraction process -- Experimental program -- Test results and discussion -- Conclusions -- References -- Appendices.
Abstract:
The effectiveness of biodegradable solvents was evaluated using centrifuge extraction method in this project. It was found that biodegradable solvents were less effective in extracting asphalt compared to chlorinated solvents such as 1,1,1-trichloroethane. However, despite the fact that the basic chemical compositions of different biodegradable solvents are very different, their effectiveness in determining asphalt content and aggregate gradation was found to be about the same. Furthermore, limestone aggregates, which have a much higher percent absorption, were found to yield a much lower extracted asphalt content compared to pea gravel aggregates. Other variables such as solvent dissolving time, solvent rinsing frequency, water rinsing frequency, etc., were also found to affect the extracted asphalt content and aggregate gradation.
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