Rational Use of terminal Achorages in Portland Cement Concrete Pavements

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Report describing the results of a study to look at various systems used to protect bridges from expansion of Portland cement concrete (PCC) due to changes in temperatures. It includes background information on the problem, identifies particular bridges that have concerns, a literature review on the topic, results of field experimentation, collection and analysis of data, and conclusions and recommendations, with supplementary references and appendices.

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xvii, 91 p. : col. ill., col. maps ; 28 cm.

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Jaiswal, Harshita; Ryu, Sungwoo; Choi, Pangil; Choi, Seongcheol; Jayawickrama, Priyantha; Senadheera, Sanjaya et al. May 2012.

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  • Main Title: Rational Use of terminal Achorages in Portland Cement Concrete Pavements
  • Added Title: Technical report (Texas Tech University. Center for Multidisciplinary Research in Transportation)

Description

Report describing the results of a study to look at various systems used to protect bridges from expansion of Portland cement concrete (PCC) due to changes in temperatures. It includes background information on the problem, identifies particular bridges that have concerns, a literature review on the topic, results of field experimentation, collection and analysis of data, and conclusions and recommendations, with supplementary references and appendices.

Physical Description

xvii, 91 p. : col. ill., col. maps ; 28 cm.

Notes

Abstract: "It has long been stated that portland cement concrete (PCC) pavements can grow and push bridges, resulting in damage to bridge structures. To protect bridge structures from damages due to the expansion of PCC pavements, three terminal systems are currently used in Texas: anchor lug (AL), wide-flange (WF), and expansion joint (EJ) systems. However, the effectiveness of these three systems has not been fully evaluated. This study investigated the parameters affecting the movements of continuously reinforced concrete pavement (CRCP) due to temperature variations near bridge terminal areas, whether thermal expansion of CRCP causes damage to bridge structures, and if it does, which terminal type is the most cost effective. Field evaluations revealed that subbase friction plays an important role, and the movement of CRCP due to temperature variations was not excessive if the subbase friction is adequate and may not cause damage to the bridge structures. Most of the distresses near the bridge terminal areas were due to volume changes or instability in the embankment materials. The end movement of CRCP could be accommodated by a simple EJ system if there is adequate subbase friction. The benefits of WF and AL systems are doubtful considering their higher initial construction costs compared with that of a simple EJ system. On the other hand, it should be noted that in a few CRCP projects, observations were made of CRCP expanding beyond the thermal expansion limits, implying that there are other expansion mechanisms than thermal expansions. The investigation of CRCP expansions due to factors other than thermal volume changes was out of the scope of this project. Simple structural analysis showed that if CRCP expands beyond thermal expansion limits, it is practically impossible to restrain the slab expansions with known methods including the AL system."

Includes bibliographical references (p. 83-84)

Publication date from cover; "Report Date: February 2012."

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  • Report No.: FHWA/TX-12/0-6326-1
  • OCLC: 801108068
  • TxDoc Number: T1311.7 R311 NO.6326-1
  • Report No.: 6326-1
  • Archival Resource Key: ark:/67531/metapth281716

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  • May 2012

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  • Dec. 12, 2012, 5:08 p.m.

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  • June 6, 2017, 1:07 p.m.

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Jaiswal, Harshita; Ryu, Sungwoo; Choi, Pangil; Choi, Seongcheol; Jayawickrama, Priyantha; Senadheera, Sanjaya et al. Rational Use of terminal Achorages in Portland Cement Concrete Pavements, report, May 2012; Lubbock, Texas. (https://texashistory.unt.edu/ark:/67531/metapth281716/: accessed April 24, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.

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