Design, Development and Use of the Concrete for the Superstructure of the Viaduct Section of the Docklands Light Railway Extension, London

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Title: Design, Development and Use of the Concrete for the Superstructure of the Viaduct Section of the Docklands Light Railway Extension, London

Author(s): J.M. Best, S.R. Maynard, and E.A. Kay

Publication: Special Publication

Volume: 228

Issue:

Appears on pages(s): 1009-1026

Keywords: concrete; durability; precasting; railways; testing

Date: 6/1/2005

Abstract:
Design and construction of elements of Docklands Light Railway City Airport Extension in London are described. The scheme is 4.4km long and consists of sections at-grade, on embankment, on viaduct and in trough cuttings. Durability design was carried out to the new European Standard EN 206 and its British application document BS 8500. The paper concentrates on the concrete for the segments of the viaduct. A particular aspect of segment production was the need to meet high early strengths under winter working conditions in order to achieve 24 hour mould turn round and to meet the project schedule. In-situ strength for striking and lifting purposes was established by using the results of pull-out tests calibrated against cubes cured under the same conditions as the segments.