Investigation of shrinkage in industrial concrete slabs on ground

Orth, Julian Daen-Jara (2005). Investigation of shrinkage in industrial concrete slabs on ground B.Sc Thesis, School of Engineering, The University of Queensland.

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Author Orth, Julian Daen-Jara
Thesis Title Investigation of shrinkage in industrial concrete slabs on ground
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2005
Thesis type B.Sc Thesis
Supervisor Dr Liza O'Moore
Total pages 102
Language eng
Subjects 0905 Civil Engineering
Formatted abstract

Cracking of concrete slabs poses serious problems with respect to the durability and serviceability of structures. Restraint in concrete leads to the development of tensile stresses and possible cracking. To manage cracking, designers have traditionally specified a 56 day shrinkage strain.  

This experimentally based thesis aims to build upon work being done by researcher in the field on the effects of early age shrinkage on industrial concrete pavements. Recent research has focused on quantifying the effects of environment and restraint on early age shrinkage (within the first 12 hours) and the effects on long term shrinkage. Three commercial concrete mixes with specified shrinkage strains of 400, 650 and 800 microstrain were batched and instrumented with strain gauges. The aim was to investigate the relationship between early age shrinkage, which is not measured in the standard drying shrinkage test, standard 56-day drying shrinkage strain values and actual strains in slabs.  

The results were compared with various prediction models from relevant codes. As concrete codes are being updated to autogenous shrinkage, it is important to determine the accuracy of the models. The models do not take into account early age effects taking into account drying and autogenous shrinkage after one day.

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
Citation counts: Google Scholar Search Google Scholar
Created: Thu, 11 Apr 2013, 11:40:48 EST by Mr Yun Xiao on behalf of Scholarly Communication and Digitisation Service