Question: Does the use of high strength concrete reduce prestress losses in pretensioned bridge beams? Answer: Experimental evidence shows that higher strength concrete has a higher modulus of elasticity and a lower creep coefficient than conventional strength concrete. The ultimate
SELF-CONSOLIDATING CONCRETE IN MAINE
Joseph L. Hartmann, Federal Highway Administration and Denis Dubois, Maine Department of Transportation Over the last decade, the Maine Department of Transportation (MDOT) has been an aggressive pursuer of emerging and advanced concrete technologies. MDOT has incorporated the use of
MAXIMUM EFFECTIVE CONCRETE STRENGTHS IN PRETENSIONED BEAMS
Henry G. Russell, Henry G. Russell, Inc. The use of high strength concrete in precast, prestressed concrete beams allows for a higher precompression to be applied to the beams. Consequently, the tensile stress in the bottom flange calculated from the
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PREFABRICATED BRIDGES FOR RAPID CONSTRUCTION
Mary Lou Ralls, Texas Department of Transportation and Benjamin Tang, Federal Highway Administration Transportation agencies today face significant challenges to restore highway capacity while enhancing safety through construction work zones. About one-third of our Nation’s bridges are in need of