- document
-
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
- document
-
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
- document
-
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
- document
-
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
- document
-
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
- document
-
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
- document
-
Schipper, H.R. (author), Grunewald, S. (author), Troian, S. (author), Raghunath, P. (author), Schlangen, E. (author), Copuroglu, Oguzhan (author)Expensive CNC (computer numerical controlled)-milled formwork is required for the production of double-curved precast concrete elements for cladding or shell structures. The innovative flexible mould method for economically efficient and sustainable production of such elements, developed at Delft University of Technology, comprises the use of a...conference paper 2017
- document
-
Šavija, B. (author), Lukovic, M. (author), Kotteman, Geerte (author), Chaves Figueiredo, S. (author), França de Mendonça Filho, F. (author), Schlangen, E. (author)Abstract In the past two decades, much research has been devoted to overcoming the inherent brittleness of cementitious materials. To that end, several solutions have been proposed, mainly utilizing fibres. One of the most promising classes of materials is strain hardening cementitious composite (SHCC). It utilizes PVA fibres, and it is...journal article 2017
- document
-
Šavija, B. (author), Feiteira, J. (author), Araújo, M. (author), Chatrabhuti, S. (author), Raquez, JM (author), van Tittelboom, K (author), Gruyaert, Elke (author), de Belie, N (author), Schlangen, E. (author)Polymeric capsules can have an advantage over glass capsules used up to now as proof-of-concept carriers in self-healing concrete. They allow easier processing and afford the possibility to fine tune their mechanical properties. Out of the multiple requirements for capsules used in this context, the capability of rupturing when crossed by a...journal article 2017
- document
-
Liu, D (author), Šavija, B. (author), Smith, G.E. (author), Flewitt, P.E.J. (author), Lowe, T. (author), Schlangen, E. (author)In this work, porosity-property relationships of quasi-brittle materials are explored through a combined experimental and numerical approach. In the experimental part, hemihyrate gypsum plaster powder (CaSO 4 ⋅1/2H 2 O CaSO4⋅1/2H2O) and expanded spherical polystyrene beads (1.5–2.0 mm dia.) have been mixed to form a model material with...journal article 2017
- document
-
Sherzer, G. (author), Gao, P. (author), Schlangen, E. (author), Ye, G. (author), Gal, E. (author)Modeling the complex behavior of concrete for a specific mixture is a challenging task, as it requires bridging the cement scale and the concrete scale. We describe a multiscale analysis procedure for the modeling of concrete structures, in which material properties at the macro scale are evaluated based on lower scales. Concrete may be viewed...journal article 2017
- document
-
Tabakovic, A. (author), Braak, Dirk (author), van Gerwen, Mark (author), Copuroglu, Oguzhan (author), Post, W. (author), Garcia, Santiago J. (author), Schlangen, E. (author)This article presents development of a novel self-healing technology for asphalt pavements, where asphalt binder rejuvenator is encapsulated within the compartmented alginate fibres. The key objective of the study was to optimise the compartmented alginate fibre design, i.e., maximising amount of rejuvenator encapsulated within the fibre. The...journal article 2017
- document
-
Lukovic, M. (author), Ye, G. (author), Schlangen, E. (author), van Breugel, K. (author)In concrete repair systems, material properties in the repair material and interface are greatly influenced by the initial moisture content of the concrete (or mortar) substrate. In order to quantify moisture profiles inside the repair system, X-ray absorption was used. Preliminary studies are performed first to determine the absorption rate of...journal article 2017
- document
-
The Use of Alkaliphilic Bacteria-based Repair Solution for Porous Network Concrete Healing MechanismSangadji, S. (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author), Schlangen, E. (author)Bacteria induced calcium carbonate precipitation based on metabolic conversion of nutrients has been acknowledged for having potentials in self-healing cement-based materials. Recent studies have shown the development of bacteria-based repair solution (liquid) for concrete surface repair. This article demonstrates the feasible application of...conference paper 2017
- document
-
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
- document
-
Qian, Zhiwei (author), Schlangen, E. (author), Ye, G. (author), van Breugel, K. (author)Multiscale modeling for cement-based materials, such as concrete, is a relatively young subject, but there are already a number of different approaches to study different aspects of these classical materials. In this paper, the parameter-passing multiscale modeling scheme is established and applied to address the multiscale modeling problem...journal article 2017
- document
-
Tziviloglou, E. (author), Wiktor, V.A.C. (author), Jonkers, H.M. (author), Schlangen, E. (author)Biogenic self-healing cementitious materials target on the closure of micro-cracks with precipitated inorganic minerals originating from bacterial metabolic activity. Dormant bacterial spores and organic mineral compounds often constitute a biogenic healing agent. The current paper focuses on the investigation of the most appropriate organic...journal article 2017
- document
-
Tabakovic, A. (author), Schuyffel, L.S. (author), Karač, Aleksandar (author), Schlangen, E. (author)This paper explores the potential methods for evaluating a healing system for asphalt pavements. The healing system under investigation involves compartmented calcium-alginate fibres encapsulating an asphalt binder healing agent (rejuvenator). This system presents a novel method of incorporating rejuvenators into asphalt pavement mixtures....journal article 2017
- document
-
Šavija, B. (author), Zhang, H. (author), Schlangen, E. (author)Excessive cracking can be a serious durability problem for reinforced concrete structures. In recent years, addition of microencapsulated phase change materials (PCMs) to concrete has been proposed as a possible solution to crack formation related to temperature gradients. However, the addition of PCM microcapsules to cementitious materials...journal article 2017
- document
-
Lv, Leyang (author), Schlangen, E. (author), Xing, Feng (author)Water ingress into cracked concrete structures is a serious problem, as it can cause leakage and reinforcement corrosion and thus reduce functionality and safety of the structures. In this study, the application of water-swelling rubber particles for providing the cracked concrete a self-sealing function was developed. The feasibility of...journal article 2017