AUSTRALIAN LEAD ANTIOXIDANT ROAD TRIALS: LABORATORY TESTING OF THE TRIAL BINDERS

Sprayed seal road trials, laid to determine whether the lead antioxidant lead diamyldithiocarbamate (LDADC) reduced the rate of bitumen hardening, were sampled after two years. Those sections containing antioxidant had all hardened less than the control (no antioxidant) sections. Analysis of binder extracted from the trial sections showed that, where the concentration of LDADC originally added was less than 3%, no LDADC now remained. Those sections which originally contained more than 5% LDADC now had between 1.6% and 2.1% of active antioxidant. Similar behavior was shown by the antioxidant in a laboratory durability test where substantial improverments in durability were obtained but the antioxidant was rapidly consumed in the early stages of the test. It is recommended that the trials continue to be monitored to determine whether the early improvement in bitumn hardening is reflected in long term performance.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0869104012
• Corporate Authors:

  ARRB

  Melbourne, Victoria  Australia 
• Authors:
  • Oliver, JWH
• Publication Date: 1989

Media Info

• Pagination: v.p.

Subject/Index Terms

• TRT Terms: Antioxidants; Binders; Bitumen; Lead compounds; Materials tests; Road tests; Seal coating; Sealing (Technology); Sealing compounds
• Geographic Terms: Australia
• Old TRIS Terms: Bitumen tests; Sealing experiments
• Subject Areas: Highways; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00495224
• Record Type: Publication
• ISBN: 0 86910 401 2
• Report/Paper Numbers: ARR No. 165
• Files: TRIS
• Created Date: Jul 31 1990 12:00AM