Mark Gaines, PE, Washington State Department of Transportation, Mohammad Sheikhizadeh, PE, David Evans and Associates The aging and deficient bridge infrastructure of the country is facing a replacement crisis. As funding for replacement of deteriorated bridges is becoming scarcer, there
The New Shear Resistance Factor for Lightweight Concrete and Its Effects on Design
Reid W. Castrodale, PhD, PE, Expanded Shale, Clay and Slate Institute (ESCSI) When the first edition of the AASHTO LRFD Bridge Design Specifications was published in 1994, a special shear resistance factor, φ, for lightweight concrete of 0.70 was introduced.
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Prediction of SCC Formwork Pressure1
Kamal Khayat, Missouri University of Science and Technology, Ahmed Omran, Université de Sherbrooke, Matthew D’Ambrosia, CTLGroup The use of SCC enables rapid placement and labor savings; however, lack of information regarding formwork pressure variations during casting and pressure decay after
Manette Bridge 303/4A Replacement
Paul Kinderman, Washington State DOT The Manette Bridge 303/4A replacement project replaced an 80-year-old bridge consisting of five truss main spans and eight plate girder approach spans across the Port Washington Narrows in Bremerton, Washington. The replacement bridge is 1,550
Crystalline Silica Rule Under Review at the Office of Management and Budget
Thomas Harman, Portland Cement Association, and Tony Kojundic, Elkem Materials Inc. In February 2011, the Occupational Safety and Health Administration (OSHA) sent its proposal to manage occupational exposure to respirable crystalline silica (RCS) in the workplace to the Office of
Read More >>Crystalline Silica Rule Under Review at the Office of Management and Budget