Title:
Evaluation of high strength lightweight concrete precast, prestressed bridge girders

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dc.contributor.advisor Kahn, Lawrence F.
dc.contributor.author Dunbeck, Jennifer en_US
dc.contributor.committeeMember Castrodale, Reid
dc.contributor.committeeMember Kurtis, Kimberly
dc.contributor.department Civil and Environmental Engineering en_US
dc.date.accessioned 2009-06-08T18:43:35Z
dc.date.available 2009-06-08T18:43:35Z
dc.date.issued 2009-04-08 en_US
dc.description.abstract This thesis evaluates the use of High Strength Lightweight Concrete (HSLW) in bridge girders for the I-85 Ramp "B" Bridge crossing SR-34 in Cowetta County, Georgia. This bridge consisted of four spans; all girders were constructed using lightweight expanded slate aggregate. Spans 2 and 3 had a design strength of 10,000 psi, and span 2 was chosen for this research. The BT-54 girders were 107 ft 11½ inches in length. The prestressing strands used in these girders were 0.6 in diameter, grade 270, low relaxation strands. Material properties and member properties were tested. All 5 girders of span 2 were instrumented with vibrating wire strain gages at midspan, as well as with DEMEC inserts for transfer length measurements and with a deflection measurement system. Transfer length measurements found the transfer length of the girders to be 23% less than the values suggested by AASHTO and ACI equations. The deflection measurements showed 4.26 inches of camber at 56-days while the girders were stored at Standard Concrete Products. The camber measurements matched theoretical predictions within 5%. Mechanical property tests found the concrete to be within all design requirements. A stiffness, load test was performed on each of the 5 girders at Standard Concrete Products. The average stiffness value of 8.428 x 106 kip ft2 is recommend for use by GDOT engineers in designing the deck and road profile. This thesis discusses all short term findings from construction to the end of storage. A later report will address long term issues such as creep and shrinkage, as well as the performance of the girders as part of the bridge. en_US
dc.description.degree M.S. en_US
dc.identifier.uri http://hdl.handle.net/1853/28091
dc.publisher Georgia Institute of Technology en_US
dc.subject Prestressed en_US
dc.subject Precast en_US
dc.subject Concrete en_US
dc.subject High strength en_US
dc.subject Lightweight en_US
dc.subject.lcsh Girders
dc.subject.lcsh Bridges
dc.subject.lcsh High strength concrete
dc.subject.lcsh Lightweight concrete
dc.title Evaluation of high strength lightweight concrete precast, prestressed bridge girders en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.corporatename School of Civil and Environmental Engineering
local.contributor.corporatename College of Engineering
relation.isOrgUnitOfPublication 88639fad-d3ae-4867-9e7a-7c9e6d2ecc7c
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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