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Kamat, Ameya (author), Palin, D. (author), Lubelli, B. (author), Schlangen, E. (author)
Plasters and renders used in historic monuments are vulnerable to degradation caused by salt weathering. Crystallisation inhibitors (molecules/ions that alter salt crystallisation) mixed into mortars have shown promising results in mitigating salt damage by inhibiting salt crystallisation, promoting salt transport to the evaporating surface, and...
conference paper 2023
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He, S. (author), Lukovic, M. (author), Jonkers, H.M. (author), Schlangen, E. (author)
In the current study, experiments were carried out to investigate the structural performance of reinforced concrete (RC) beams with a self-healing cover zone. The cover zone consists of a 1.5-cm-thick layer of bacteria-embedded strain hardening cementitious composite (SHCC) for a combination of crack width control and crack healing. The aim is...
conference paper 2023
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Sayadi, Sina (author), Ricketts, Evan (author), Schlangen, E. (author), Cleall, Peter (author), Mihai, Iulia (author), Jefferson, Anthony (author)
Self-healing cementitious materials with microcapsules are complex multiscale and multiphase materials. The random microstructure of these materials governs their mechanical and transport behaviour. The actual microstructure can be represented accurately with a discrete lattice model, but computational restrictions mean that the size of domain...
conference paper 2023
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Wan, Z. (author), Xu, Y. (author), Šavija, B. (author)
Compared with other self-healing mechanisms, embedding vascular networks in cementitious matrix enables repairing wider cracks and performing multiple healing cycles. For vascular-based self-healing cementitious composites, additive manufacturing (AM) allows fabricating vascular structures with complex geometry. For Fused Filament Fabrication ...
book chapter 2023
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Šavija, B. (author)
Self-healing concrete has shown excellent potential in improving the durability of (reinforced) concrete structures and reducing the need for their repair and maintenance. This has been further substantiated by several successful full-scale demonstrator projects. Nevertheless, industrial uptake of the technology is lagging behind, mainly due to...
conference paper 2023
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Stellingwerff, M.C. (author)
XRealities is a recently approved pedagogic fellowship project that will run for two years, during 2019 and 2020. This paper will introduce the project plan, some early experiments and expectations. XRealities relates to the many real and digital situations that we encounter in our digitally expanded life experiences. In contemporary education,...
conference paper 2019
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Kamath, A.C. (author), Gard, W.F. (author), van de Kuilen, J.W.G. (author)
Timber sheet piles are widely used to protect canal and stream banks. Quite often, riparian vegetation also grows along these retaining structures. Roots of riparian vegetation mechanically reinforce the soil with their root systems. A timber sheetpile- vegetation model is developed taking into account the mechanical reinforcement of the...
conference paper 2019
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Fernandez Lopez, M. (author), Anastasakis, K. (author), de Jong, W. (author), Valverde, Jose Luis (author), Sanchez-Silva, Luz (author)
Fast pyrolysis characterization of three dry manure samples was studied using a pyrolyzer. A heating rate of 600°C/s and a holding time of 10 s were selected to reproduce industrial conditions. The effect of the peak pyrolysis temperature (600, 800 and 1000°C) on the pyrolysis product yield and composition was evaluated. Char and bio-oil were...
conference paper 2017
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Do, H.Q. (author), Aragon, A.M. (author), Schott, D.L. (author)
This research aims at developing a universal methodology for automated calibration of microscopic properties of modelled granular materials. The proposed calibrator can be applied for different experimental set-ups. Two optimization approaches: (1) a genetic algorithm and (2) DIRECT optimization, are used to identify discrete element method...
conference paper 2017
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Mahajan, A. (author), Dafnomilis, I. (author), Hancock, V.E. (author), Lodewijks, G. (author), Schott, D.L. (author)
Dust generation when handling wood pellets is related to the durability of the product, in other words the wear rate of particles subject to forces. During transport, storage and handling wood pellets undergo different forces when interacting with different pieces of equipment.<br/><br/>This paper assesses the representativeness of the tumbling...
conference paper 2017
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Mouri Sardarabadi, A. (author), Leshem, A. (author), Van der Veen, A.J. (author)
Aims. Image formation for radio astronomy can be defined as estimating the spatial intensity distribution of celestial sources throughout the sky, given an array of antennas. One of the challenges with image formation is that the problem becomes ill-posed as the number of pixels becomes large. The introduction of constraints that incorporate a...
journal article 2016
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Muller, H (author), Niedermeier, CA (author), Jarczyk, M. (author), Pfitzner, M (author), Hickel, S. (author), Adams, NA (author)
book chapter 2016
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Thirolf, P. G. (author), Aldawood, S (author), Böhmer, M. (author), Bortfeldt, J. (author), Castelhano, I (author), Dedes, G. (author), Fiedler, F. (author), Gernhäuser, R. (author), van der Kolff, H.G. (author), Schaart, D.R. (author)
Compton camera prototype for a position-sensitive detection of prompt γ rays from proton-induced nuclear reactions is being developed in Garching. The detector system allows to track the Comptonscattered electrons. The camera consists of a monolithic LaBr<sub>3</sub>:Ce scintillation absorber crystal, read out by a multi-anode PMT, preceded...
conference paper 2016
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Shakibjoo, A.D. (author), Vasegh, N. (author), Hassan HosseinNia, S. (author)
In this study a novel structure for time-delay MIMO systems controller design is introduced. In this method decoupled Smith predictor (SP) controller is designed using Internal Model Control structure (IMC). In order to approximate decoupled system, step response model approximation is employed and simulated on MIMO multiple time-delay system....
conference paper 2016
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Ritter, B. (author), Meskers, A.J.H. (author), Miles, O. (author), Russwurm, M. (author), Scully, S. (author), Roldan, A. (author), Hartkorn, O. (author), Jüstel, P. (author), Réville, V. (author), Lupu, S. (author), Ruffenach, A. (author)
The Earth’s magnetosphere is formed as a consequence of interaction between the planet’s magnetic field and the solar wind, a continuous plasma stream from the Sun. A number of different solar wind phenomena have been studied over the past 40 years with the intention of understanding and forecasting solar behavior. One of these phenomena in...
journal article 2015
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Van der Velden, W.C.P. (author), Van Zuijlen, A.H. (author), De Jong, A.T. (author), Bijl, H. (author)
The flow around a beveled flat plate model with an asymmetric 25 degrees trailing edge with three rounding radii is analyzed using a Navier-Stokes based open source software package OpenFOAM in order to predict the aeroacoustic properties of the models. A Large Eddy Simulation with a dynamic Smagorinsky and implicit model are used as closure...
conference paper 2015
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Verleysen, P. (author), Oelbrandt, W. (author), Naghdy, S. (author), Kestens, L. (author)
High pressure torsion (HPT) is a severe plastic deformation technique in which a small, disk-like sample is subjected to a torsional deformation under a high hydrostatic pressure. In present study, the static and dynamic tensile behaviour of commercially pure aluminium (99.6?wt%) processed by HPT is studied. The high strain rate tensile...
conference paper 2015
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Duev, D.A. (author), Zakhvatkin, M.V. (author), Stepanyants, V.A. (author), Molera Calvés, G. (author), Pogrebenko, S.V. (author), Gurvits, L.I. (author), Cimò, G. (author), Bocanegra Bahamón, T.M. (author)
Context. The accuracy of orbit determination has a strong impact on the scientific output of the Space VLBI mission RadioAstron. Aims. The aim of this work is to improve the RadioAstron orbit reconstruction by means of sophisticated dynamical modelling of its motion in combination with multi-station Doppler tracking of the RadioAstron spacecraft...
journal article 2015
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Roszko, A. (author), Fornalik-Wajs, E. (author), Donizak, J. (author), Wajs, J. (author), Kraszewska, A. (author), Pleskacz, L. (author), Kenjeres, S. (author)
The main aim of this paper was to analyze possible utilization of the low concentration nanofluids and the magnetic field to enhance heat transfer. The studied fluids were based on water with an addition of copper particles (40-60 nm diameter). They belonged to the diamagnetic group of materials. As a first attempt to stated target the analysis...
conference paper 2014
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Molera Calvés, G. (author), Pogrebenko, S.V. (author), Cimò, G. (author), Duev, D.A. (author), Bocanegra-Bahamón, T.M. (author), Wagner, J.F. (author), Kallunki, J. (author), De Vicente, P. (author), Kronschnabl, G. (author), Haas, R. (author), Quick, J. (author), Maccaferri, G. (author), Colucci, G. (author), Wang, W.H. (author), Yang, W.J. (author), Hao, L.F. (author)
Aims. The phase scintillation of the European Space Agency’s Venus Express (VEX) spacecraft telemetry signal was observed at X-band (? = 3.6 cm) with a number of radio telescopes of the European Very Long Baseline Interferometry (VLBI) Network in the period 2009–2013. Methods. We found a phase fluctuation spectrum along the Venus orbit with a...
journal article 2014
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