Effect of coarse filler on shrinkages and dynamic mechanical properties of epoxy grouts

Shamsuddoha, Md and Islam, Md Mainul and Aravinthan, Thiru and Manalo, Allan and Lau, Kin-Tak (2014) Effect of coarse filler on shrinkages and dynamic mechanical properties of epoxy grouts. Journal of Multifunctional Composites, 2 (1). pp. 61-66. ISSN 2168-4278

Abstract

Structures are designed and constructed for a certain lifetime based on its constituent materials, level of quality control, surrounding environment and accidental loads experienced during service. Structures that are situated in an adverse environment are susceptible to material loss and cracks over their ageing service life. Often, advanced composite materials offer substantially enhanced mechanical, durability and constructability
related properties essential for durable repair of the deteriorated structure. 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. As a result, 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 calculated,
to determine the 'post-gel' part of the curing contraction which subsequently produces residual stresses in the hardened grout systems. The dynamic thermal behaviour of the
grouts were also characterised to determine the range of in-situ application.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2014 DEStech Publications, Inc. Published Version restricted in accordance with apparent policy of publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 15 Feb 2014 06:39
Last Modified: 16 Jun 2017 00:14
Uncontrolled Keywords: epoxy grout; repair; rehabilitation; cure shrinkage
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090505 Infrastructure Engineering and Asset Management
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective: B Economic Development > 88 Transport > 8899 Other Transport > 889903 Pipeline Transport
Identification Number or DOI: doi:10.12783/issn. 2168-4286/2.1/
URI: http://eprints.usq.edu.au/id/eprint/24474

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