EVAPORATION OF CUTTERS FROM A CHIP SEAL

In advancing explanations for the occasional poor performance of a chip seal, the common assumption was that because high flash point (HFP) is relatively less volatile than other cutters, it remains in the bitumen for extended periods, reducing the viscosity and the resilience of the binder to traffic. The aim of the work presented here is to check the correctness of this assumption. The rate of evaporation of HFP from a binder was measured separately in a laboratory and a field trial. At the same time the evaporation rates of diesel fuel oil and of other cutters were also measured. A special laboratory test method was developed to measure the residues of hydrocarbons in the field trial samples collected from the road surface. In the field trial, all sections performed well over a 15 month period and no significant differences in the level of hydrocarbon residues had been found. In the laboratory, the rate of evaporation of the HFP cutter was not significantly different to other cutters. To mathematically describe the rate of evaporation of hydrocarbons from a bituminous membrane, an equation based on the solution of Fick's diffusion equation with a constant diffusion coefficient was developed. This equation fits the experimental data and has the potential to predict the evaporation rates of cutters in the field from laboratory and climatic data. It has been concluded that the type of cutter used has no significant effect on the success of sprayed chip seal work, and that use of HFP cutters does not result in increased levels of hydrocarbon residues in the binder of a seal. (a) For the covering entry of this conference, please see IRRD abstract no. 895118.

• Record URL:
  http://arrbknowledge.com
• Corporate Authors:

  Australian Asphalt Pavement Association

  Level 2, 5 Wellington Street
  Kew, Victoria  Australia  3101
• Authors:
  • MEYDAN, A
• Conference:
  • AAPA INTERNATIONAL FLEXIBLE PAVEMENTS CONFERENCE, 10TH, 1997, PERTH, WESTERN AUSTRALIA, VOL 1
• Publication Date: 1997

Language

• English

Media Info

• Features: References;
• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Binders; Chippings; Conferences; Evaporation; Field tests; Hydrocarbons; Laboratories; Pavements; Performance; Seal coats; Tests
• ITRD Terms: 4948: Binder; 4585: Chippings; 8525: Conference; 5910: Durability; 7183: Evaporation; 7367: Hydrocarbon; 6226: In situ; 6237: Laboratory (not an organization); 2955: Pavement; 2984: Surface dressing; 6255: Test
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00749442
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Jun 26 1998 12:00AM