Fly Ash and Durability in the Australian Concrete Code


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Title: Fly Ash and Durability in the Australian Concrete Code

Author(s): P. F. Walsh

Publication: Special Publication

Volume: 91


Appears on pages(s): 681-692

Keywords: carbonation; concrete durability; curing; fly ash; pozzolans; reinforced concrete; standards; General

Date: 2/1/1986

In drafting the durability section of the Australian concrete code, the committee faced both an urgent problem and a lack of precise data. This paper outlines the concepts in the draft code with a particular emphasis on the protection of reinforcement and the influence of fly ash on durability. Based on a qualitative understanding of the fundamental parameters, some engineering decisions and classifications are made. Where ample curing or self-curing is available, fly ash is a desirable component of durable reinforced concrete. For building exteriors where minimal curing is provided, achieving quality concrete cover is difficult. In this respect, concrete containing fly ash may be more affected than plain concrete.