Title: Casting with heavy rain: Study of the accidents occured when placing concrete on a post-tensioned bridge deck

Author(s): Delibes Liniers, A.; Fernández Gómez, J.; Acon Robleña, M.A.

Publication: ACHE

Volume: 45

Issue: 190

Appears on pages(s): 137 - 143

Keywords:

DOI:

Date: 1/1/1994

Abstract:
When placing concrete on a two 35 m length span bridge deck, near Bilbao, several accidents occured: - Collapse of the internal forms made with spanded metal. - Interruption of the placing process and formation of ""cold-joints"". - Possibility of alteration of fresh concrete due to water action. The study here described deals with the following problems: - Time of tensioning and tensioning operations. - Minimum period before striking. - Shear at the interfaces. - Safety factor of the whole deck.