Evaluating the time-dependent and bond characteristics of lightweight concrete mixes for Kansas prestressed concrete bridges : technical summary.
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2011-07-01
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OCLC Number:741360480
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Edition:Technical summary.
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures;NTL-HIGHWAY/ROAD TRANSPORTATION-Materials;
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Abstract:The majority of the bridges in Kansas are in rural areas. Many of these are
becoming structurally deficient, and are in need of replacement. Due to the location of
these bridges, cost of transporting prestressed girders to these areas often makes use of
cast-in-place bridges more economical. Use of lightweight aggregate in these bridge
girders would reduce the total weight and could allow multiple girders to be shipped on
one semi-truck. This would reduce transportation costs and allow the more economical
prestressed girders to be used in rural areas. Lightweight prestressed girders could be
put in place using a lower capacity crane due to the lower self-weight of the beam. The
construction process would be quicker without the need of form work associated with
cast-in-place girders. The lighter self-weight would also increase allowable live loads
the bridges would be able to carry.
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