Self-consolidating concrete : a synthesis of research findings and best practices.
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2014-02-01
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Abstract:The Connecticut Department of Transportation (ConnDOT) currently permits the
use of self-consolidating concrete (SCC) technology on a limited basis for
precast drainage structures, barriers and retaining walls. These include but
are not limited to catch basins, manholes, culverts, retaining walls, and
barrier curbs. At this time, ConnDOT does not permit the use of SCC for
prestressed concrete applications, such as for bulb-tee girders, box beams and
deck slabs; and does not permit its use for cast-in-place applications.
This study was conducted in order to help facilitate the specification of SCC
technology by the ConnDOT. This included visiting precast plants that produce
concrete products for ConnDOT and observing their practices, conducting a
literature review on SCC, and summarizing a Research Advisory Committee survey
conducted by the Missouri Department of Transportation appropriate to ConnDOT
specifications. Based upon the findings of the study, it is recommended herein
that ConnDOT’s SCC specification continue to be limited to precast concrete
applications not involving any prestressed elements. Once ConnDOT implements a
more rigorous SCC specification and acceptance process involving the use of
more workability tests, ConnDOT should consider pilot projects for
precast/prestressed bridge elements and cast-in-place concrete construction.
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