The following letters were received concerning the article entitled “Capping Cylinders for Testing High Strength Concrete,” in Issue No. 14. Nicholas J. Carino, National Institute of Standards and Technology (NIST) In 1994, NIST and FHWA published the results of a
COUNTY BRIDGES IN OHIO
Stephen Mary, Hamilton County, Ohio and Richard A. Miller, University of Cincinnati Many bridges in the USA are designed and maintained by city and county engineers. These bridges must meet the same strength, serviceability, and durability requirements as state-owned bridges.
SOUTH DAKOTA’S FIRST HPC BRIDGE
Hadly G. Eisenbeisz, South Dakota Department of Transportation The South Dakota Department of Transportation’s first use of high performance concrete (HPC) in an entire superstructure became a reality in the summer of 1999 with the construction of a railroad overpass
LETTERS TO THE EDITOR
The following letter was received from Bryce Simons, State Concrete Engineer with the New Mexico State Highway &Transportation Department concerning the article on “Capping Cylinders for Testing High Strength Concrete” in Issue No. 14. I find it extremely encouraging that
ONTARIO’S HPC PERFORMANCE SPECIFICATION
Hannah C. Schell and Jana Konecny, Ontario Ministry of Transportation, Canada The Ontario Ministry of Transportation’s (MTO) current specification for high performance concrete (HPC) is intended to give contractors greater flexibility with respect to the selection of materials and mix