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CTS Research Seminars — Spring 2009
For more information, contact Joe Barbeau, 612-626-2862 or barb0092@umn.edu.
February 19
In conjunction with the CTS Transportation Infrastructure Research Council meeting, which begins at 3:45 p.m.
Self-Compacting Concrete (SCC) for Prestressed Bridge Girders
Speaker: Carol Shield, Professor, Department of Civil Engineering, University of Minnesota
2:45 p.m. – 3:45 p.m. CST, Room 1130, Mechanical Engineering Building
This presentation covers the conducting of 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.
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