PROVISION OF DURABLE CONCRETE STRUCTURES

This paper discusses the changes that have taken place in the Queensland Transport Concrete Specification in an effort to produce concrete structures with an optimised durability performance using locally available materials. Specific emphasis is placed on the philosophical and technical changes that have occurred over the last 20 years to help minimise the potential durability distress caused by alkali-silica reaction (ASR) or cement/aggregate interaction. Since 1982, Queensland Transport has been investigating the frequency and severity of ASR distress in the associated concrete road structure network. On examination, existing Australian Standard Tests(as at 1993) for controlling ASR were found to be deficient and a new patented accelerated test procedure on concrete was developed by Queensland Transport. The results of field inspections of structures and laboratory research have been incorporated in our accelerated test for ASR and included in our revised concrete specification. This project has proven the significant return on investment that can be achieved through the completion of fundamental applied concrete technology research on local materials and environmental conditions. (a) For the covering abstract of this conference see IRRD abstract no. 861222.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 1-10

Subject/Index Terms

Filing Info

  • Accession Number: 00669779
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Dec 23 1994 12:00AM