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Lukovic, M. (author), Šavija, B. (author), Ye, G. (author), Schlangen, E. (author), van Breugel, K. (author)Corrosion of steel reinforcement is the main cause of deterioration in reinforced concrete structures. It can result in cracking and spalling of the concrete cover. After the damaged cover is repaired, reinforcement corrosion might continue and even accelerate. While the development of the corrosion cell is difficult to control, the damage can...journal article 2017
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Savija, B. (author), Schlangen, E. (author)An experimental study of the influence of autogeneous healing on chloride ingress in cracked concrete is presented. In the study, two concrete mixtures (a Portland cement mix and a blast furnace slag mix), two healing regimes (submerged and fog room regime), two cracking ages (14 and 28 days), and multiple crack widths are used as parameters. An...journal article 2016
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Wan, Jiuming (author), Wu, Shaopeng (author), Xiao, Y. (author), Liu, Q. (author), Schlangen, E. (author)Ceramic fiber, with a major composition of Al<sub>2</sub>O<sub>3</sub> and SiO<sub>2</sub>, has advantages of stability at relatively high temperature, big specific surface area and resistance to external mechanical vibration. It has the potential contribution of improving the rutting resistance and temperature sensitivity of modified asphalt...journal article 2016
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Tabakovic, A. (author), Post, W. (author), Cantero, D. (author), Copuroglu, Oguzhan (author), Garcia, Santiago J. (author), Schlangen, E. (author)This paper explores the potential use of compartmented alginate fibres as a new method of incorporating rejuvenators into asphalt pavement mixtures. The compartmented fibres are employed to locally distribute the rejuvenator and to overcome the problems associated with spherical capsules and hollow fibres. The work presents proof of concept of...journal article 2016
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Lukovic, M. (author), Šavija, B. (author), Schlangen, E. (author), Ye, G. (author), van Breugel, K. (author)Differential shrinkage between repair material and concrete substrate is considered to be the main cause of premature failure of repair systems. The magnitude of induced stresses depends on many factors, for example the degree of restraint, moisture gradients caused by curing and drying conditions, type of repair material, etc. Numerical...journal article 2016
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Heard, P (author), Šavija, B. (author), Liu, D (author), Smith, GE (author), Hallam, KR (author), Schlangen, E. (author), Flewitt, P.E.J. (author)In quasibrittle materials the addition of specific microstructural features such as porosity can lead to departure from linear elastic behaviour prior to maximum force, followed by graceful failure. A simple but extreme example is reticulated vitreous carbon foam, with its opencell structure of brittle ligaments connected in a threedimensional...conference paper 2016
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Šavija, B. (author), Lukovic, M. (author), Pacheco Farias, J. (author), Schlangen, E. (author)Reinforcement corrosion is the most important deterioration mechanism affecting reinforced concrete infrastructures. After corrosion starts, expansive pressures are exerted onto the surrounding concrete, causing cracking and spalling of the cover concrete. The amount of cover cracking can possibly be reduced by using strain hardening...conference paper 2016
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- Tabakovic, A. (author), Schlangen, E. (author) journal article 2016
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Ma, X. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author), Han, N (author), Xing, F (author)External sulfate attack is one of the situations that may cause gradual but severe damage in cementitious materials, which may lead to cracking, increased permeability and strength loss. In this paper, thin-walled hollow cement paste cylinders with a wall thickness of 2.5mm were made considering the slow penetration process of sulfate ions under...conference paper 2016
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Romero Rodriguez, C. (author), Chaves Figueiredo, S. (author), Chiaia, B. (author), Schlangen, E. (author)Cracking in concrete structures compromises the durability and functionality of the structures themselves. Different kinds of self-healing concretes, less or more sophisticated, have been developed in the past ten years to overcome early cracks in structures. An experimental study of a novel self-healing concrete is presented. Bitumen, used as...conference paper 2016
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Mirmomeni, M. (author), Heidarpour, A. (author), Schlangen, E. (author), Smith, S (author)Concrete is recognized for being a fire-resistant construction material. At elevated temperatures concrete can, however, undergo considerable damage such as strength degradation, cracking, and explosive spalling. In recent decades, reuse of fire-damaged concrete structures by means of developing techniques to repair the degraded material has...conference paper 2016
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Šavija, B. (author), Schlangen, E. (author)Phase change materials (PCMs) have found their use in concrete technology for increasing energy efficiency of building envelopes. In recent years, however, new potential applications for PCMs in concrete have been suggested, for example for reducing freeze-thaw damage and melting of ice forming on top of concrete pavements. A recent application...journal article 2016
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Šavija, B. (author), Lukovic, M. (author), Schlangen, E. (author)Strain-hardening cementitious composites (SHCCs) are a class of cement-based materials that show strain-hardening behavior in tension. This is achieved by multiple microcracking, which results in a tightly spaced crack pattern with relatively small crack widths (50–80 μm, in general) and high strain capacity (up to 4–5%). Because of their...journal article 2016
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Zhang, H. (author), Šavija, B. (author), Chaves Figueiredo, S. (author), Lukovic, M. (author), Schlangen, E. (author)This work aims to provide a method for numerically and experimentally investigating the fracture mechanism of cement paste at the microscale. For this purpose, a new procedure was proposed to prepare micro cement paste cubes (100 × 100 × 100 µm3) and beams with a square cross section of 400 × 400 µm2. By loading the cubes to failure with a...journal article 2016
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Lv, Leyang (author), Schlangen, E. (author), Yang, Z. (author), Xing, Feng (author)Self-healing cementitious materials containing a microencapsulated healing agent are appealing due to their great application potential in improving the serviceability and durability of concrete structures. In this study, poly(phenol-formaldehyde) (PF) microcapsules that aim to provide a self-healing function for cementitious materials were...journal article 2016
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Pan, Z. (author), Schlangen, E. (author)In self-healing concrete, healing agents (including the bacteria and nutrients for the bacteria) are often sealed in capsules to survive the mixing of concrete. When the crack occurs, these capsules can be damaged, the healing agents can be released and the chemical actions can be activated. This research mainly focuses on the probability...conference paper 2015
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Binti Md Yunus, B. (author), Schlangen, E. (author), Jonkers, H.M. (author)An experiment was carried out in this study to investigate the effect of compressive load on chloride penetration in self-healing concrete containing bacterial-based healing agent. Bacteria-based healing agent with the fraction of 2 mm – 4 mm of particles sizes were used in this contribution. ESEM was applied to study samples which were taken by...conference paper 2015
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Tziviloglou, E. (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author), Schlangen, E. (author)The innovative technology of self-healing concrete allows the material to repair the open micro-cracks that can endanger the structure’s durability, due to ingress of aggressive liquids. Various concepts of self-healing concrete use encapsulation techniques, in order to immobilize and protect the healing agent during mixing and setting. In this...conference paper 2015
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- Tabakovic, A. (author), Post, W. (author), Garcia Espallargas, S.J. (author), Schlangen, E. (author) lecture notes 2015
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Savija, B. (author), Schlangen, E. (author)Concrete structures are commonly cracked when in service. To overcome issues arising from cracking, self-healing concrete is being developed. Together with the development of the material, techniques to verify and quantify self-healing are being developed. A number of destructive techniques have been used in the past. It would be beneficial to...conference paper 2015