Abstract
Carbon-based nanomaterials are commonly used to produce nanocomposites with polymeric matrices due to their unique properties. Vapour-grown carbon nanofibres (VGCF) are employed in this work to modify highly cross-linked epoxy-based resin (DGOA) used as a bonding agent in CFRP/concrete system. The influence of such modification on adhesive properties as well as on bond performance between CF-fabrics and concrete at various services conditions is addressed. Transmission electronic microscopy (TEM) technique was employed to characterize the structure of VGCF. The latter was identified as stacked-cup and bamboo-like fibres with various thickness of grapheme walls as well as of the hollow cores. The inclusion of (1 and 2 wt%) of VGCF into DGOA was found to reduces the glass transition temperature (Tg) measured by Differential Scanning Calorimetry (DSC) technique. Results of tests at elevated temperatures showed improvement in bond strength in tension of about 7 °C for samples with 2 wt% of VGCF-modified DGOA when compared with unmodified DGOA. The exposure of loaded CFRP/concrete specimens to different temperature and humidity cycles for different exposure periods (21 and 44 days) results in achieving sufficient bond performance using VGCF-modified DGOA. This bond performance was conducted by means of single-lap shear test. The strain along the bonded length of survived CFRP/concrete specimens was measured as well using 3D image correlation photogrammetry.
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References
Al-Safy R, Al-Mahaidi R, Simon GP et al (2014) Thermo-mechanical characterization of VGCF-modified adhesive for bond between CFRP and concrete subjected to combined effect of temperature and humidity. Adv Struct Eng 17:1718–1823
Al-Safy R, Al-Mahaidi R, Simon GP (2011) Thermal and mechanical characterizations of nanomaterial-modified adhesive used in bonding CFRP to concrete. J Adhes 87:842–857
Kumar S, Rath T, Mahaling RN et al (2007) Study on mechanical, morphological and electrical properties of carbon nanofiber/Polyetherimide composites. Mater Sci Eng, B 141:61–70
Xu LR, Bhamidipati V, Zhong WH et al (2004) Mechanical property characterization of a polymeric nanocomposite reinforced by graphitic nanofibers with reactive linkers. Compos Mater 38:1563–1582
Hammel E, Tang X, Trampert M et al (2004) Carbon nanofibers for composite applications. Carbon 42:1153–1158
Zeng QH, Yu AB, Lu GO et al (2005) Clay-based polymer nanocomposites: research and commercial development. J. Nanosci and Nanotechnol 5:1574–1592
Ting JM, Lake ML (1995) Vapor-grown carbon-fiber reinforced carbon composites. Carbon 33:663–667
Patton RD, Pittman CUJ, Wang L et al (2001) Vapor grown carbon fiber/phenolic matrix composites for rocket nozzles and heat shield. In: Proceedings of the 4th conference on aerospace materials, processes, and environmental technology, NASA/CP-2001-210427
Sherman LM (2007) Carbon nanotubes lots of potential—if the price is right. Plast Technol 83:68–73
Breuer O, Sundararaj U (2004) Big returns from small fibers: a review of polymer/carbon nanotube composites. Polymer Compos 25:630–645
Tibbetts GG, Lake ML, Strong KL et al (2007) A review of the fabrication and properties of vapor-grown carbon nanofiber/polymer composites. Compos Sci and Technol 67:1709–1718
Miyagawa H, Rich MJ, Drzal LT (2006) Thermophysical properties of epoxy nanocomposites reinforced by carbon nanotubes and vapor grown carbon fibers. Thermochim Acta 442:67–73
Zhou Y, Pervin F, Jeelani Sh (2007) Effect vapour grown carbon nanofiber on thermal and mechanical properties of epoxy. J Mater Sci 42:7544–7553
Choi Y-K, Sugimoto K-I, Song S-M et al (2005) Mechanical and physical properties of epoxy composites reinforced by vapor grown carbon nanofibers. Carbon 43:2199–2208
Al-Safy R, Al-Mahaidi R, Simon GP (2010) CFRP strengthening of concrete structures using modified adhesives. In: The 5th civil engineering conference in the Asian Region and Australasian structural engineering conference (CECAR 5 and ASEC 2010), Sydney, New South Wales, Australia, 09–12 Aug 2010, (USB copy)
Material properties for PR-24 XT-LHT obtained from (Pyrograf®-III, Applied Sciences, Inc., USA) web site: (http://pyrografproducts.com/Merchant5/merchant.mvc?Screen=cp_nanofiber)
Al-Safy R, Al-Mahaidi R, Simon GP (2010) Thermal and mechanical characterization of nanomaterials modified bonding adhesive used in CFRP/concrete system. In: The 4th international conference on advanced computational engineering and experimenting (ACE-X 2010), Paris, France, (Abstract Book-CD copy)
Terrones H, Hayashi T, Muoz-Navia M et al (2001) Graphitic cones in palladium catalysed carbon nanofibres. Chem Phys Lett 343:241–250
Endo M, Kim YA, Hayashi T et al (2002) Structural characterization of cup-stacked-type nanofibers with an entirely hollow core. Appl Phys Lett 80:1267–1269
Al-Safy R, Al-Mahaidi R, Simon GP (2013) A study of using high functionality-based resin for bond between CFRP and concrete under harsh environmental conditions. J Compos Struct 95:295–306
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Al-Safy, R., Al-Mahaidi, R., Simon, G.P., Habsuda, J. (2020). Effect of Vapour-Grown Carbon Nanofibres on Thermo-Mechanical Properties of High-Functionality Based Resin Used in CFRP Strengthening System Subjected Severe Service Conditions. In: Öchsner, A., Altenbach, H. (eds) Engineering Design Applications II. Advanced Structured Materials, vol 113. Springer, Cham. https://doi.org/10.1007/978-3-030-20801-1_9
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DOI: https://doi.org/10.1007/978-3-030-20801-1_9
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