Durability concerns for Queensland's concrete bridges

Costello, James Samuel (2001). Durability concerns for Queensland's concrete bridges B.Sc Thesis, School of Engineering, The University of Queensland.

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Author Costello, James Samuel
Thesis Title Durability concerns for Queensland's concrete bridges
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2001
Thesis type B.Sc Thesis
Supervisor Dr. H. Ronagh
Total pages 84
Language eng
Subjects 09 Engineering
Formatted abstract

This thesis aims to document the extent of durability related defects on Queensland’s concrete bridges. Focus has been given to road bridges under the authority of the Queensland Department of Main Roads in the Gold Coast area. Due to their proximity to the coast, these structures will be exposed to the most aggressive environmental conditions. These structures will also experience higher traffic loads and more intense load cycles that those on council roads. The high demands placed on the road network by the public means these structures are integral in maintaining an efficient and fluid road network.

A database was completed, containing 110 concrete bridges. From the reported infected bridge elements and defects, deterioration mechanisms were estimated for affected bridges.

The deterioration mechanisms have been detailed; explaining their process, methods of identification, their extent on the bridge stock and recommendations to minimise the future extent of durability defects

Common repair techniques have been discussed, indicating their suitable application, effectiveness and cost. A case study of two structures highlights the need to select repairs to suit distress levels and local conditions.

The lack of recorded history has prevented the thorough investigation of the durability performance of concrete structures in Queensland. 37% of the concrete bridges in the Gold Coast exhibited signs of durability distress. Furthermore, 50% of bridges in the most aggressive exposure classification are defective and in need of repair. Engineers need to have a sound knowledge of the various distress mechanisms and the ways in which to limit their occurrence on local concrete structures. Particular focus needs to be given to the environmental conditions in which a structure is located, during the initial design stages. Furthermore, strict quality assurance is essential during construction to ensure that these design requirements are achieved.

Keyword Durability concerns
Concrete bridges
Additional Notes * Civil Engineering undergraduate theses. 2001

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
Citation counts: Google Scholar Search Google Scholar
Created: Sat, 05 Oct 2013, 15:22:59 EST by Mr Yun Xiao on behalf of Scholarly Communication and Digitisation Service