The 2004 review on prevention of alkali silica reaction in concrete

Alkali-Silica Reaction (ASR) was first diagnosed on concrete structures in Hong Kong in 1991. Limitation of alkali content in concrete to 3 kilograms per cubic metre was introduced in 1994 to control ASR. The present review was carried out to see whether and how to update the control approach. Current practice in the world is to accept the use in concrete of reactive aggregates to various degrees. The risk of ASR is controlled through the prescription of preventive measures taking into account the nature of structures, the service environment of the structure, and the reactivity of aggregates available. In this light, there is room for expanding the control framework in Hong Kong for informed use of reactive aggregates in concrete. Knowledge and experience of ASR and its prevention in Hong Kong was reviewed for formulating the preventive measures for the expanded control framework. The text of the report describes key elements of international practices and shows the rationale behind the proposed expanded ASR control framework for Hong Kong. Appendix H describes the expanded control framework. The other Appendices provide detailed information of local and international experience and practices.

Language

  • English

Media Info

  • Pagination: 79p
  • Serial:
    • Issue Number: 167

Subject/Index Terms

Filing Info

  • Accession Number: 01390072
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Aug 23 2012 3:58AM