Basem H. Alsamman and Mark A. Darnall, California Department of Transportation The California Department of Transportation (Caltrans) is currently building a new fourspan HPC precast, prestressed, post-tensioned bridge to carry Interstate 5 across the Sacramento River in Northern California. This
Question and Answer
Question: What can be done to reduce cracking in a concrete bridge deck? Answer: Research over the past 30 years has addressed the causes of cracking in bridge decks. The results of the studies provide guidance on modifications in materials,
EVOLUTION OF HPC SPECIFICATIONS IN TEXAS
Kevin R. Pruski, William R. Cox, and Mary Lou Ralls, Texas Department of Transportation The Texas Department of Transportation (TxDOT) specifications for high performance concrete (HPC) have evolved through TxDOT’s experience. The first two HPC projects in Texas in the
MASS CONCRETE IN THE CARQUINEZ BRIDGE
Ric Maggenti, California Department of Transportation The new Carquinez Bridge is a 3000-ft (1-km) long suspension bridge spanning the Carquinez Strait at the north end of San Francisco Bay. The cables of the bridge are supported on concrete towers that
SPECIFICATION CHANGES FOR HPC
Four previous issues of HPC Bridge Views* have contained descriptions of changesneeded in the AASHTO Specifications to facilitate the implementation of HPC.The proposed revisions are based on work performed as part of a pooled-fund projectadministered by the FHWA as Project