Adaptation of instrumentation to effectively measure suctions in concrete

Taylor, Ryan John (2005). Adaptation of instrumentation to effectively measure suctions in concrete B.Sc Thesis, School of Engineering, The University of Queensland.

       
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Author Taylor, Ryan John
Thesis Title Adaptation of instrumentation to effectively measure suctions in concrete
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2005
Thesis type B.Sc Thesis
Supervisor Prof Peter Dux
Total pages 56
Language eng
Subjects 0905 Civil Engineering
Formatted abstract

To understand the fundamental mechanisms behind the formation of plastic shrinkage cracking in concrete, the development of suctions must be considered. By investigating this phenomenon, the study endeavoured to adapt existing instrumentation to effectively measure in-situ suctions in concrete. Suction profiles were generated from the implementation of the newly modified devices. It was proposed that the development of suctions in concrete was analogous to the suctions in fly ash. Thus suction profiles were developed in fly ash as a bridging step between the theoretical suctions in soils and the suctions in concrete.


By reviewing literature on the devices available for measuring suctions in geotechnical and agricultural situations, it was determined that tensiometers and hygrometers were the two devices most suited to this study. The paper discusses specific details to how the experiments were conducted, and refined, to determine the effectiveness of the devices to measure suctions. To validate findings, a comprehensive discussion on the compliance of the experimental data to the theoretical data was presented. This included the fitting of the Fredlund and Xing (1994) moisture characteristic curve and the comparison between the experimental and theoretical dimensionless data.

Keyword Concrete -- Cracking
Additional Notes Civil Engineering CIVL4580 research thesis, October 2005, call number THE18999 disk 2

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
 
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