STORAGE OF BITUMINOUS CONCRETE IN INERT GAS

POSSIBLE PROBLEMS ASSOCIATED WITH HOT STORAGE OF BITUMINOUS CONCRETE MIXES CAN BE MIGRATION OF ASPHALT, SEGREGATION OF THE MIX, AND AGING OF THE ASPHALT CEMENT DUE TO PROLONGED STORAGE AT HIGH TEMPERATURE. LABORATORY AND FIELD INVESTIGATIONS WERE CONDUCTED TO EVALUATE THE EFFECT OF PROLONGED HOT STORAGE ON THE PROPERTIES OF A BITUMINOUS PAVING MIX. NO ADDITIVE WAS USED IN THE ASPHALT CEMENT. STORAGE OF MIXES WAS ATTEMPTED WITH AND WITHOUT INERT GAS FOR AS LONG AS 10 DAYS. FIELD TESTS WERE CONDUCTED WITH INERT GAS ONLY TO EXTEND THE STORAGE PERIOD. MIGRATION OF OF ASPHALT AND SEGREGATION OF MIX DID NOT POSE ANY PROBLEM. IN THE PILOT TESTS, MIX STORED WITHOUT INERT GAS HARDENED AT A FASTER RATE THAN THAT STORED WITH AN INERT ATMOSPHERE. IF THE MAXIMUM ALLOWABLE STORAGE TIME IS DETERMINED FROM THE CRITERION OF MINIMUM PERCENTAGE OF RETAINED PENETRATION (AASHO M 20-70) ON TFOT RESIDUE, THIS CAN VARY DEPENDING ON THE ASPHALT SOURCE, COMPOSITION OF THE BITUMINOUS MIX, TEMPERATURE, AND TIME OF MIXING. NO STORAGE MIGHT BE POSSIBLE IN SOME CASES; HOWEVER, BASED ON THESE CRITERIA, THE ALLOWABLE STORAGE PERIOD USING INERT GAS WAS FOUND TO BE 24 HOURS IN THIS FIELD STUDY. IT IS YET TO BE ESTABLISHED TO WHAT EXTENT THE DURABILITY OF THE PAVEMENT IS SACRIFICED BECAUSE OF PREMATURE HARDENING OF THE ASPHALT IN THE HOT STORAGE BIN.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1973/468/468-005.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309022541
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Characteristics of Bituminous Materials. 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:
  • Kandhal, Prithvi S
  • Wenger, Monroe E
• Discussers:
  • Davis, R L
• Publication Date: 1973

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 61-72
• Monograph Title: Asphalt and asphalt mix technology
• Serial:
  • Highway Research Record
  • Issue Number: 468
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Asphalt concrete; Bituminous mixtures; Field tests; Laboratory tests; Migration; Noble gases; Storage facilities
• Uncontrolled Terms: Segregation
• Old TRIS Terms: Aging; Hot storage
• Subject Areas: Highways; Materials; Terminals and Facilities;

Filing Info

• Accession Number: 00211882
• Record Type: Publication
• ISBN: 0309022541
• Files: TRIS, TRB
• Created Date: May 7 1974 12:00AM