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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures;NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-HIGHWAY/ROAD TRANSPORTATION-Design;
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Abstract:AASHTO M 43 “Standard Specification for Sizes of Aggregate for Road and Bridge Construction”
addresses particle size distribution of material included in various maximum nominal size aggregates. This
particle size distribution requires additional processing such as screening, separating, and recombining to
meet AASHTO M 43 or the Mississippi Department of Transportation’s particle size distribution
requirements. Specifiers of concrete mixtures have utilized additional requirements on aggregates by
placing upper and lower limits on combined percent retained on individual sieves. MDOT has recently
utilized this concept by introducing similar limits on aggregate gradations used in concrete for bridge decks.
This research project investigates the workability and shrinkage performance of concrete containing
aggregate gradations not meeting these requirements and compares this performance to concrete containing
aggregate gradations meeting MDOT’s requirements for bridge decks.
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