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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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Copuroglu, O. (author)Plane and crossed polarization are the two standard light modes in polarized light microscopy that are widely used to characterize crystalline and amorphous phases in cement-based materials. However, the use of the crossed polarized light mode has been found to be restrictive for studying birefringent phases quantitatively due to the extinction...journal article 2016
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Burgelman, N. (author), Li, Z. (author), Dollevoet, R. (author)This paper investigates the effect of the calculation of the longitudinal location of a wheel rail contact point on the wheelset’s motion in a vehicle dynamic simulation. All current vehicle dynamic software programs assume that the contact between wheel and rail takes place in the vertical plane through the wheelset’s rolling axis. However,...journal article 2016
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Jiang, X. (author), Qiang, X. (author), Kolstein, M.H. (author), Bijlaard, F.S.K. (author)The research presented in this paper is an experimental study and numerical analysis on mechanical behavior of the adhesively-bonded joint between FRP sandwich bridge deck and steel girder. Generally, there are three typical stress states in the adhesively-bonded joint: shear stress, tensile stress, and combination of both. To realize these...journal article 2016
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Tsouvalas, A. (author), Van Dalen, K.N. (author), Metrikine, A. (author)Modal decomposition is often applied in elastodynamics and acoustics for the solution of problems related to propagation of mechanical disturbances in waveguides. One of the key elements of this method is the solution of an eigenvalue problem for obtaining the roots of the dispersion equation, which signify the wavenumbers of the waves that may...journal article 2015
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Lukovic, M. (author), Ye, G. (author)In concrete repair systems, material properties of the repair material and the interface are greatly influenced by the moisture exchange between the repair material and the substrate. If the substrate is dry, it can absorb water from the repair material and reduce its effective water-to-cement ratio (w/c). This further affects the hydration rate...journal article 2015
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Xia, H. (author), Bakker, M.C.M. (author)This work investigates the ability of LIBS to produce quality spectra from small particles of concrete demolition waste using single-shot spectra collected in open air. The 2–8?mm materials are rounded river gravel, green glass shards, and plastic flakes. Considered are focal length, air, moisture, laser energy, and laser incidence angle (LIA)....journal article 2015
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Schoenmaker, R. (author), Van der Lei, T.T.E. (author)This paper is the result of an international, explorative study of the alignment of government and road authority goals from different European countries and Western Australia. The goal of the study is to advance the understanding of the development of performance management of road agencies. Agencies around the world are using performance...journal article 2015
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Van der Put, T.A.C.M. (author)It is shown that the postulate of strain softening of the fracture stress is based on the error to regard the nominal stress to be the actual, ultimate stress, at the actual area of the fracture plan. Strain sof-tening called yield drop is elastic unloading of the actual elastic stress at the intact, not ltimate, elas-tic loaded part of the...journal article 2015
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- Wang, J. (author), Mignon, A. (author), Snoeck, D. (author), Wiktor, V.A.C. (author), Van Vliergerghe, S. (author), Boon, N. (author), De Belle, N. (author) journal article 2015
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Giardina, C. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)This paper describes a new framework for the assessment of potential damage caused by tunneling-induced settlement to surface masonry buildings. Finite element models in two and three dimensions, validated through comparison with experimental results and field observations, are used to investigate the main factors governing the structural...journal article 2015
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Oregui, M. (author), Molodova, M. (author), Nunez, A. (author), Dollevoet, R.P.B.J. (author), Li, Z. (author)This paper presents a feasibility study to determine if the health condition of Insulated Rail Joints (IRJs) can be assessed by examining their dynamic response to impact excitation. First, a reference dynamic behavior is defined in the frequency domain of 50-1200 Hz based on field hammer test measurements performed on a IRJ baseline (i.e., a...journal article 2015
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Xiong, W. (author), Tang, J. (author), Zhu, G. (author), Han, N. (author), Schlangen, E. (author), Dong, B. (author), Wang, X. (author), Xing, F. (author)Steel is prone to corrosion induced by chloride ions, which is a serious threat to reinforced concrete structures, especially in marine environments. In this work, we report a novel capsule-based selfrecovery system that utilizes chloride ions as a trigger. These capsules, which are functionalized via a smart response to chloride ions, are...journal article 2015
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Li, K. (author), Stroeven, P. (author), Le, L.B.N. (author)A novel methodology is described for porosimetry as well as for water transport through the pore system in dynamic DEM-based virtual cementitious materials. The pore network topology, the pore size distribution and the pore connectivity are assessed on the basis of a robotics-inspired pore delineation method and star volume measurements....journal article 2015
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- Lantsoght, E.O.L. (author) journal article 2015
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De Koster, S.A.L. (author), Mors, R.M. (author), Nugteren, H.W. (author), Jonkers, H.M. (author), Meesters, G.M.H. (author), Van Ommen, J.R. (author)Concrete structures are often reinforced with steel. In order for the reinforcement to take over tensile forces, concrete has to crack. Through such cracks, water and compounds that are harmful to concrete can enter. This can cause durability issues like leakage, concrete degradation and reinforcement corrosion. In situ repair of cracks is often...journal article 2015
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Boot, W. (author), Terwel, K.C. (author), Strang, H. (author)When structural damage occurs and disputes arise, forensic engineers have to search for the causes of this damage to find out who can be held liable for it. Legal systems must provide an adequate, reasonable, effective and complete way to solve these disputes. Each country has its own system with advantages and disadvantages. This paper provides...journal article 2015
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Van Dalen, K.N. (author), Mikesell, T.D. (author), Ruigrok, E.N. (author), Wapenaar, C.P.A. (author)Retrieving virtual source surface waves from ambient seismic noise by cross correlation assumes, among others, that the noise field is equipartitioned and the medium is lossless. Violation of these assumptions reduces the accuracy of the retrieved waves. A point-spread function computed from the same ambient noise quantifies the associated...journal article 2015
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Hofko, B. (author), Eberhardsteiner, L. (author), Fussl, J. (author), Grothe, H. (author), Handle, F. (author), Hospodka, M. (author), Grossegger, D. (author), Nahar, S.N. (author), Schmets, A.J.M. (author), Scarpas, A. (author)As a widely accepted concept, bitumen consists of four fractions that can be distinguished by their polarity. Highly polar asphaltene micelles are dispersed in a viscous phase of saturates, aromatics and resins (maltene phase). Different concentrations of asphaltenes in the bitumen result in a range of mechanical response properties. In an...journal article 2015
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Wiktor, V.A.C. (author), Jonkers, H.M. (author)This paper presents the field performance in a parking garage of the recently developed bacteria-based repair system for concrete. This liquid-based repair system aims at the sealing of cracks and decrease of the porosity due to the production of a calcium-based biomineral. The system combines advantages of both a traditional repair system for...journal article 2015