Titre du document / Document title

White precast stainless reinforced concrete formwork : 20 years on

Auteur(s) / Author(s)

MACGREGOR I. D. ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Department of Building and Construction, City University of Hong Kong, HONG-KONG

Résumé / Abstract

White concrete, 50 mm thick with a sand-blasted finish provides the permanent precast formwork for all the exterior faces of the 15 storey building at 1 The Terrace, Wellington, New Zealand. The colour, texture and strong architectural lines create an impressive structure. The formwork is reinforced with stainless steel, the cover to which is only 20 mm. Production was completed in 1977 and the building officially opened in 1979. In 1995 an inspection did not detect any corrosion. By contrast, in the same area some in situ concrete reinforced with black steel, with approximately the same cover and of the same age, has spalled badly. The area could be classified as a severe (possibly very severe) marine climate. The inspection also showed that the sand-blasted surface was generally in good condition. Production complexities created by the multiplicity of precast unit types, meant a 50% increase in mould numbers was required to maintain production rates. During the pre-production planning, stainless steel detailing was improved upon, and drawing errors corrected. It is suggested that all specialist materials be supplied at the start of such jobs to guarantee quantity and to ensure production and construction continuity. Visually, joint alignment is not as critical as with a wall of flat panels. Finally, it is noted that there is a need for building owners and managers to have an appreciation of how this form of surface texture relates to maintenance.

Revue / Journal Title

Proceedings of the Institution of Civil Engineers. Structures and buildings   ISSN 0965-0911 

Source / Source

1998, vol. 128, n^o2, pp. 211-218 (7 ref.)

Langue / Language

Anglais

Editeur / Publisher

Telford, London, ROYAUME-UNI  (1992) (Revue)

Mots-clés anglais / English Keywords

White concrete ; Reinforced concrete ; Stainless steel ; Buildings ; Case study ; New Zealand ; History ; Performance evaluation ; Prefabricated element ; Shape ; Inspection ; Maintenance ; Durability ; Illustrated description ; Formwork ; Oceania ;

Mots-clés français / French Keywords

Béton blanc ; Béton armé ; Acier inoxydable ; Bâtiment ; Etude cas ; Nouvelle Zélande ; Histoire ; Evaluation performance ; Elément préfabriqué ; Forme ; Inspection ; Maintenance ; Durabilité ; Description illustrée ; Coffrage ; Océanie ;

Mots-clés espagnols / Spanish Keywords

Hormigón blanco ; Hormigón armado ; Acero inoxidable ; Edificio ; Estudio caso ; Nueva Zelandia ; Historia ; Evaluación prestación ; Elemento prefabricado ; Forma ; Inspección ; Mantenimiento ; Durabilidad ; Descripción ilustrada ; Encofrado ; Oceania ;

Localisation / Location

INIST-CNRS, Cote INIST : 6862 H, 35400007625511.0100