ABSTRACT
ABSTRACT. The recently opened crossing of the Severn Estuary near Bristol has extensive use of concrete in a variety of applications. The severe conditions of the site and extraordinary tidal range led to the development of large scale specialist concreting equipment for both marine and land based work. Precasting and repetition were principle features of the 5.2km long bridge, built under a design and build contract. Many design features were used to enhance durability, notably extensive use of ground granulated blastfurnace slag as cement replacement. Much of the substructure involved large volumes of in situ placed concrete in thin walled precast caisson shells.
