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Application of high strength prestressingstrands in precast beams made withself-compacting concr


Proposals for the design of prestressed SCC beams

 


The applicability of self-compacting concrete (SCC) for the production of precast, prestressed beams is investigated. At the same time, the use of high strength steel prestressing strands (2160 N/mm2) in combination with traditional concrete (TC) and SCC is examined. In a first test-series, the material properties of the concrete are determined. Among these tests are compression tests, shrinkage and creep measurements, determination of moduli of elasticity etc. In a second test-series, 4 beams of 12 m length are tested up to failure in a fourpoint bending test. For these beams, two kinds of concrete (SCC and TC) and two kinds of prestressing strands (1/2” seven-wire strands, 1,860 N/mm2 and 2,160 N/mm2) are used. During the tests, concrete deformations and vertical displacements are followed manually as well as electronically.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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