Cure shrinkage in epoxy grouts for grouted repairs

Shamsuddoha, Md and Islam, Md Mainul and Aravinthan, Thiru and Manalo, Allan and Lau, Kin-tak (2013) Cure shrinkage in epoxy grouts for grouted repairs. In: 4th International Conference on Smart Materials and Nanotechnology in Engineering (SMN 2013), 10-12 Jul 2013, Gold Coast, Australia.

Abstract

Structures can go through harsh environmental adversity and can experience material loss and cracks during their service lives. Infill material is used to ensure a supporting bed for a grouted repair. Epoxy grouts are used for repairing and rehabilitating structures, such as foundations, bridges, piers, transportation pipelines, etc., because they are resistant to typical chemicals and possess superior mechanical properties than other grouts. The resin based infill used inside the void or cracked space
of the repair is vulnerable to shrinkage. When these filled grouts have high resin content, cracks can develop from residual stresses, which can affect the load transfer performance. It follows that interlayer separation and cracking of infill layer can occur in a grouted repair.
In this study, volumetric shrinkage of two epoxy grouts was measured over 28 days using a Pycnometer. The highest volumetric shrinkage measured after 7 days was found to be 2.72%. The results suggest that the volumetric shrinkage can be reduced to 1.1% after 7 days, through the
introduction of a coarse aggregate filler; a 2.5 times reduction in shrinkage. About 98% and 92% of the total shrinkage over the 28 day period, of the unfilled and filled grouts respectively, was found to occur within 7 days of mixing. The gel-time shrinkages were also calculated, to determine the 'postgel' part of the curing contraction which subsequently produces residual stresses in the hardened grout systems.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Print copy of the Proceedings held in the USQ Library at call no. 620.5 Fou.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 28 Jan 2014 02:00
Last Modified: 16 Jun 2017 00:08
Uncontrolled Keywords: epoxy grout; repair; rehabilitation; cure shrinkage
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
01 Mathematical Sciences > 0102 Applied Mathematics > 010207 Theoretical and Applied Mechanics
Socio-Economic Objective: B Economic Development > 88 Transport > 8899 Other Transport > 889903 Pipeline Transport
Identification Number or DOI: 10.1117/12.2028085
URI: http://eprints.usq.edu.au/id/eprint/24456

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