Researchers conducted an experimental program to investigate the viability of producing self-consolidating
concrete (SCC) using locally available aggregate, and the viability of its use in the production of precast
prestressed concrete bridge girders for the State of Minnesota.
Six precast prestressed bridge girders were cast using four SCC and two conventional concrete mixes. Variations in
the mixes included cementitious materials (ASTM Type I and III cement and Class C fly ash), natural gravel and
crushed stone as coarse aggregate, and several admixtures. The girders were instrumented to monitor transfer
length, camber, and prestress losses. In addition, companion cylinders were cast to measure the compressive
strength and modulus of elasticity, and to monitor the creep and shrinkage over time. The viability of using several
test methods to evaluate SCC fresh properties was also investigated.
The test results indicated that the overall performance of the SCC girders was comparable to that of the
conventional concrete girders. The measured, predicted, and calculated prestress losses were generally in good
agreement. The study indicated that creep and shrinkage material models developed based on companion cylinder
creep and shrinkage data can be used to reasonably predict measured prestress losses of both conventional and SCC
prestressed bridge girders.
Erkmen, Bulent; Shield, Carol K.; French, Catherine E..
Self-Compacting Concrete (SCC) for Prestressed Bridge Girders.
Minnesota Department of Transportation.
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