Question: What is service life and how is it predicted? Answer: The AASHTO LRFD Bridge Design Specifications defines service life as the period of time that the bridge is expected to be in operation. The design life is defined as
BENEFITS OF CHEMICAL ADMIXTURES IN HPC
Michael A. Caldarone, Construction Technology Laboratories, Inc. Chemical admixtures have been incorporated into concrete mix proportions for many years in order to attain performance properties. Most high performance concrete (HPC) mixes contain at least one type of chemical admixture. In
THE BOW RIVER BRIDGE – A PRECAST RECORD
Karen A. Bexten and Shane Hennessey, Tadros Associates, LLC and Bill LeBlanc, Con-Force Structures Limited Currently under construction near Calgary, Canada, the 774-ft (236-m) long twin structures of the Bow River Bridge use high performance concrete for their precast, prestressed
DELAWARE’S HPC BRIDGES
James T. Pappas, Delaware Department of Transportation The Delaware Department of Transportation (DelDOT) first discussed the use of high performance concrete (HPC) with the Federal Highway Administration early in 1996. Based on these discussions, DelDOT initiated trial projects with HPC