CHEMISTRY OF BREAKING OF ASPHALT EMULSIONS

THE AMOUNT OF ASPHALT EMULSION COAGULATED BY CONTACT WITH DIFFERENT AGGREGATES IS DETERMINED FOR A SERIES OF SOAP- STABILIZED ASPHALT EMULSIONS. IT IS SHOWN THAT THE ACID ACTION OF THE STONES IS NOT AS IMPORTANT IN BREAKING AS HAS SO FAR BEEN SUPPOSED. THE DECISIVE FACTOR IS THE REACTION BETWEEN THE EMULSIFIER AND THE CALCIUM IONS WHICH ARE DISPLACED FROM THE STONES BY CONTACT WITH THE EMULSIFIER SOLUTION. THE PROCESS IS NOT CONCLUDED BECAUSE THE STONE SURFACES ARE BLOCKED UP BY COAGULATED BITUMEN. THE TENDENCY FOR BLOCKADE IS DEPENDENT ON THE TYPE OF AGGREGATE AND ON THE ALKALINITY OF THE EMULSION.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1965/67/67-007.pdf
• Supplemental Notes:
  • 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.
• Authors:
  • Bohn, A O
• Publication Date: 1965

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 122-136
• Monograph Title: Bituminous materials and mixes
• Serial:
  • Highway Research Record
  • Issue Number: 67
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Acids; Aggregates; Asphalt emulsions; Bitumen; Calcium; Calcium chloride; Cations; Chemistry; Coagulation; Dispersers; Emulsified asphalt; Emulsions; Fracture mechanics; Ions; pH value; Soap; Stabilized materials
• Uncontrolled Terms: Emulsion breaking
• Old TRIS Terms: Soap stabilized asphalt emulsions
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00210531
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Dec 12 1994 12:00AM