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Brancart, J. (author), Scheltjes, G. (author), Diaz, M.M. (author), Van Mele, B. (author), Van Assche, G. (author)Research in the field of smart materials that exhibit self-repair mechanisms has greatly expanded over the last few years. This is especially true for polymers and polymer composite materials. One class of self-healing polymer materials is the reversible polymer network systems that use dynamic covalent bonds as a means to repair sustained...conference paper 2013
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Everitt, D.T. (author), Coope, T.S. (author), Bond, I.P. (author), Trask, R.S. (author), Wass, D.F. (author)Self-healing polymers typically feature monomer and catalyst either dispersed within a host matrix, or encapsulated within hollow vessels. Unprotected highly active catalysts, sensitive to air and moisture, can readily react with amine cross-linking agents during the cure of reactive prepolymers e.g. epoxy resins. Therefore, catalysts stable to...conference paper 2013
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Qiu, J. (author), Schlangen, H.E.J.G. (author), Van de Ven, M.F.C. (author), Shirazi, M. (author)Reclaimed Asphalt (RA) is one of the largest fractions of raw materials used in road construction today. Probably over 90% of the total RA in the Netherlands is being reused in new asphalt constructions. RA contains aggregates coated with very hard bitumen (penetration grade of 10-20). During service, the bituminous binder loses its flexibility...conference paper 2013
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Wang, J.Y. (author), Van Vlierberghe, S. (author), Dubruel, P. (author), Verstraete, W. (author), De Belie, N. (author)Self-healing concrete is regarded as a promising solution to reduce the high maintenance and repair cost of concrete infrastructure. Due to the limited autogenous healing capacity of concrete as such, additives are needed to enhance its self-healing properties. Among various strategies, microbial-based self-healing has gained increasing...conference paper 2013
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Bultreys, T. (author), Masschaele, B. (author), Hillewaere, X. (author), Dierick, M. (author), Van Loo, D. (author), Van Hoorebeke, L. (author), Cnudde, C. (author)This work presents recent advancements in X-ray micro-computed tomography (XRMCT) of self-healing materials at Ghent Universitys Centre for X-ray Tomography (UGCT). Results of XRMCT imaging in a self-healing polymer system are shown to demonstrate the use of XRMCT in self-healing studies. Furthermore, two new XRMCT scanners are presented. The...conference paper 2013
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Hillewaere, X. (author), Billiet, S. (author), Teixeira, R. (author), Rahier, H. (author), Du Prez, F. (author)Abstract only.conference paper 2013
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Tsangouri, E. (author), Van Tittelboom, K. (author), Hillewaere, X.K.D. (author), Van Hemelrijck, D. (author), De Belie, N. (author), Du Prez, F.E. (author)Nowadays the self-healing process efficiency in loaded structural materials is evaluated by studying the damage mechanisms. Based on fracture mechanics theories, the resistance to damage and the cracking recovery can be an indication of healing performance. Experimentally, the cracking behavior is quantified by measuring the fracture energy of...conference paper 2013
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Hung, V.V. (author), Kishi, T. (author), Ahn, T.H. (author)Granulation technique, introducing the self-healing ability to concrete, was developed by Koide, 2010 [1] based on the capsulation technology in the food/medicine industry. In this research, self-healing granules, containing cement compounds, chemical and mineral admixtures, were fabricated by a proposed granulation process and the capability of...conference paper 2013
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Manfredi, E. (author), Michaud, V. (author)Fibre-reinforced polymers development has been driven by the need for materials that combine high stiffness and low density, but composites based on thermoset matrices tend to remain sensitive to damage, that may occur early in the matrix. Improved efficiency could be gained by integrating functionalities into the structure, namely a self...conference paper 2013
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Sangadji, S. (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author), Schlangen, H.E.J.G. (author)Bacteria induced calcite precipitation has been proven to be effective in making concrete structure self-healing. In Microlab TU Delft, the concept has been enhanced by developing a liquid bacteria-based concrete repair system. The solution contains calcite precipitating bacteria, nutrients and buffer compound which may demonstrate high...conference paper 2013
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Rae, S.I. (author), Bond, I.P. (author), Trask, R.S. (author), Wass, D.F. (author)A new approach to self-healing systems is presented that aims to overcome the inherent drawbacks of conventional liquid resin based healing systems within composites. Finite embedded systems offer limited healing potential for small volume delaminations and as such cannot effectively heal large damage volumes often associated with shear damaged...conference paper 2013
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Boba, K. (author), Heath, C. (author), Bond, I.P. (author), Trask, R.S. (author), Wass, D.F. (author)Fibre reinforced polymer composite materials are becoming more widely adopted for high performance industrial applications. The hierarchical nature of these materials offers a unique opportunity to incorporate multi-functionality whilst maintaining their excellent mechanical properties. Ideally, multifunctional composites can be configured to...conference paper 2013
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Jonkers, H.M. (author), Palin, D. (author), Flink, P.J. (author), Thijssen, A. (author)Concrete constructions in the marine environment suffer from chemical attack of sea salts which can induce damage to both the concrete matrix and embedded steel reinforcement. For example, ingress of sulfate and chloride ions can respectively result in detrimental ettringite formation and enhanced corrosion of the steel rebars. The first...conference paper 2013
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Zhang, S. (author), Langelaan, G. (author), Schut, H. (author), Brück, E. (author), Van der Zwaag, S. (author), Van Dijk, N.H. (author)Steels are among the most widely used construction materials as their mechanical properties can be tuned over a very wide range of desired combinations of strength formability and other properties. However, when exposed for long times to high temperatures steel components can exhibit premature and low-ductility creep fracture, which arises from...conference paper 2013
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Chen, Z. (author), Xu, Z. (author), Wang, G. (author), Li, H. (author), Chen, B. (author), Zeng, X.C. (author), Tan, L. (author)Crystalline solids are solid materials whose constituent atoms, molecules, or ions are arranged in a highly regulated fashion. Due to lack of rotational freedom in their stacking, they have been known as fragile materials. Even though some efforts have been dedicated to bind or mend defects/cracks in amorphous materials like concrete or polymers...conference paper 2013
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Cullinan, J. (author), Wass, D. (author), Trask, R. (author), Bond, I. (author)Abstract only.conference paper 2013
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Jakobs, R.T.M. (author), Sijbesma, R.P. (author)Abstract only.conference paper 2013
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Narayanasamy, R. (author), Alvarado, A. (author), Sanchez Medrano, J. (author), Betancourt Hernandez, J. (author), Balagurusamy, N. (author)Sustainability or environment friendly green technology is based on the use of agents of biological origin that can mimic nature in their process applications. The production and use of conventional Portland cement is significant contributor to emission of greenhouse gases and the resultant global warming. Microbial induced carbonate...conference paper 2013
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Zhang, M. (author), Han, N. (author), Xing, F. (author), Wang, X. (author), Schlangen, H.E.J.G. (author)For a microcapsule based self-healing system in the cementitious material, a fundamental issue is to find and facilitate a suitable microcapsule system, concerning either the material selection or design and manufacture process. In this study, urea formaldehyde resin is used for the shell of microcapsule, and bisphenol an epoxy resin E-51...conference paper 2013
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Sangadji, S. (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author), Schlangen, H.E.J.G. (author)Bacteria induced calcite precipitation has been proven to be effective in making concrete structure self-healing. In Microlab TU Delft, the concept has been enhanced by developing a liquid bacteria-based concrete repair system. The solution contains calcite precipitating bacteria, nutrients and buffer compound which may demonstrate high...conference paper 2013