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Edition:Final report; Mar. 2009-Dec. 2010.
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Abstract:The Mississippi Department of Transportation is incorporating changes to material
specifications and construction procedures for bridge decks in an effort to reduce shrinkage
cracking. These changes are currently being implemented into a limited number of projects to
evaluate MDOT’s new Class BD concrete. This class of concrete was modeled after Kansas
Department of Transportation’s special provision for low cracking, high performance concrete
which was based on studies conducted by the University of Kansas. While Class BD concrete is
based on recommendations of the research performed at the University of Kansas, there was
limited data available for MDOT engineers to evaluate shrinkage characteristics of concrete made
with gravel and cementitious materials available in Mississippi. This research generates shrinkage
and permeability data for thirty mixtures developed with readily available materials in Mississippi.
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