Condensed silica fume in concrete (PDF)

1988. Condensed silica fume in concrete.(PDF)

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The importance of condensed silica fume in concrete was discussed at meetings of the FIP Commission on Concrete in Calgary (1984) and London (1985), when it was decided to prepare a state-of-the-art report based on a worldwide review of published material. At the New Delhi meeting in February 1986, it was agreed to use an existing paper by Erik J. Sellevold and Terje Nilsen as a framework for the publication. The paper had originally been prepared for presentation at the International Workshop on Condensed Silica Fume in Concrete, organized by CANMET in June 1987.

The Commission appointed the following Working Party to adapt the document into an FIP publication: Steinar Heiland (Chairman) (Selmer Furuholmen A/S, Norway), Paul Acker (Laboratoire Central des Ponts et Chaussées, France), Hans Erik Gram (Swedish Cement and Concrete Research Institute), and Erik J. Sellevold (Norwegian Building Research Institute).

All 25 members of the Commission were consulted by mail for their views on the original paper. The Working Party began its work based on this broad response, which included a considerable amount of new information, research findings, and suggestions for improvement. The main modifications and extensions to the original paper are as follows:

(a) a considerably increased number of illustrations to improve readability
(b) two new chapters, one on health aspects and one on national standards, codes, and recommendations
(c) a number of case studies illustrating the practical use and application of condensed silica fume
(d) a complete rewriting of the chapter on fire resistance, based on new information
(e) a general update incorporating new information published over the previous two years

The major part of the updating is found in Chapters 5, 7, and 8. In Chapter 5 (Hardening Concrete), in particular, problems associated with low curing temperatures have been highlighted. In Chapters 7 and 8 (Durability and Corrosion), a considerable amount of new information on frost resistance, alkali–silica reaction, and corrosion has been included.

The draft of this report was discussed and approved by the Commission at the meeting in Stavanger, Norway, during the FIP/NB Symposium on High Strength Concrete in June 1987.