Skip to content

Important notice

The building where our contact centre is based was evacuated on 13 June. Our contact centre and emails are up and running again, but please be patient as we have limited support available. If you’re waiting for an application, please have a look at our current processing times.

Access keys for nzta.govt.nz

  • h Home
  • m Menu
  • 0 Show list of access keys
  • 2 Skip to content
  • 3 Skip to top
Back to Resources

Research Report 343 Environmental effects of emulsions

Published: | Category: Environmental impacts of land transport , Research programme , Research & reports | Audience: General

This report describes a study, carried out in 2006–2007, of the potential toxicity to the environment (ecotoxicity) of cationic bitumen emulsions used for chipsealing (surface dressing) in New Zealand. The ecotoxicities of the separate components of bitumen emulsions are reviewed to assess their contribution to emulsion ecotoxicity. Overseas reports on the environmental dangers of a non-ionic bitumen emulsion (a power station fuel) and runoff from cold mix asphalt are examined for relevant applications to sealing emulsions. Ecotoxicities are measured for four representative New Zealand emulsions. The implications of the findings for possible environmental classification of emulsions by environmental authorities are discussed.

Publication details

  • Author:
  • Published: 2008
  • Reference: 343
  • ISBN/ISSN: ISBN 978-0478-30964-5 ISSN 1177-0600
Top