New Cable Stayed Bridge for States of Kentucky and Indiana
Provide a durability assessment to meet a 100-year durability design requirement for the new Cable Stayed Highway Bridge. The assessment included analysis of the concrete and reinforcing steel systems. The 100-year service life requires the main towers and concrete deck portions of the bridge superstructure, to be without structural concrete spalling to the key elements identified as critical for the ongoing operation of the bridge.
TCG provided laboratory testing to characterize concrete properties from a local producer and provided service life analysis and modeling for the concrete and reinforcing steel materials to be specified for the bridge construction. Key elements of TCG services included the following:
Concrete Laboratory Testing
Produced several trial concrete mixtures
Tested for durability and concrete ion transport properties
Service Life Consulting Assessment
Assessed the environmental exposure conditions based on interviews and salt usage data from Indiana and Kentucky
Assessed corrosion resistant reinforcing steel (CRRS) alternatives and cost
Modeled concrete service life performance with STADIUM® software simulations
Evaluated the anticipated chloride levels and freshwater river degradation in the concrete over the design life.
Summarized Service life modeling results to provide the owner with key alternatives for the different bridge components, based upon their exposure conditions and structural importance
Summarized recommendations for quality control and materials specifications
Kentucky Transportation Cabinet
It was reassuring to have a firm with the capability of performing the comprehensive concrete durability assessment using the latest state-of-the-art tools.