document

Uncertainty in predictions of thermal comfort in buildings

De Wit, M.S. (author)

doctoral thesis 2001

document

Corrosion Behavior of Steel re-bars in Mortar, Containing Waste Products

Koleva, D.A. (author), Van Breugel, K. (author), De Wit, J.H.W. (author)

journal article 2008

document

Investigation of Corrosion and Cathodic Protection in Reinforced Concrete. II: Properties of Steel Surface Layers

Koleva, D.A. (author), De Wit, J.H.W. (author), Van Breugel, K. (author), Lodhi, Z.F. (author), Ye, G. (author)

The present study explores the formation of corrosion products on the steel surface (using as-received low carbon construction steel) in reinforced concrete in conditions of corrosion and subsequent transformation of these layers in conditions of cathodic protection (CP).

journal article 2007

document

Electrochemical Measurements on Previously Conditioned in Concrete Reinforcing Steel in Cement Extract Solutions

Koleva, D.A. (author), Van Breugel, K. (author), De Wit, J.H.W. (author), Bachvarov, V. (author)

journal article 2006

document

Efficiency of hanging silt curtains in cross-flow

Radermacher, M. (author), De Wit, L. (author), Uijttewaal, W.S.J. (author), Winterwerp, J.C. (author)

When dredging in sensitive environments, efforts have to be made to limit the free dispersal of suspended fine sediment from the dredging spill. Especially the use of hanging silt curtains as an environmental mitigation measure is widespread. Despite frequent application, their ability to reduce turbidity levels through vertical diversion of...

journal article 2015

document

Uncertainty in wind pressure coefficients for low-rise buildings

De Wit, M.S. (author)

This paper reports on an analysis of the uncertainty in wind pressure (difference) coefficients, which are assessed on the basis of generic knowledge and experimental data rather than with a specific (wind tunnel) experiment. The analysis is carried out on time averaged pressure coefficients in a specific case, concerning a low-rise building in...

journal article 1999

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Investigation of Corrosion and Cathodic Protection in Reinforced Concrete. I: Application of Electrochemical Techniques

Koleva, D.A. (author), De Wit, J.H.W. (author), Van Breugel, K. (author), Lodhi, Z.F. (author), Van Westing, E. (author)

The electrochemical behavior of steel reinforcement in conditions of corrosion and cathodic protection was studied, using electrochemical impedance spectroscopy (EIS) and compared to reference (noncorroding) conditions. Polarization resistance (PR) method and potentiodynamic polarization (PDP) were employed as well, in addition to ac 2 pin...

journal article 2007

document

Conventional and Pulse Cathodic Protection of Reinforced Concrete: Electrochemical Approach and Microstructural Investigations

Koleva, D.A. (author), Hu, J. (author), Van Breugel, K. (author), Boshkov, N. (author), De Wit, H. (author)

journal article 2005

document

Combining semi-distributed process-based and data-driven models in flow simulation: A case study of the Meuse river basin

Corzo, G.A. (author), Solomatine, D.P. (author), Hidayat, M.S. (author), De Wit, M. (author), Werner, M. (author), Uhlenbrook, S. (author), Price, R.K. (author)

One of the challenges in river flow simulation modelling is increasing the accuracy of forecasts. This paper explores the complementary use of data-driven models, e.g. artificial neural networks (ANN) to improve the flow simulation accuracy of a semi-distributed process-based model. The IHMS-HBV model of the Meuse river basin is used in this...

journal article 2009

document

Corrosion Performance of Reinforcing Steel in Modified Concrete Mixtures

Koleva, D.A. (author), Van Breugel, K. (author), Mol, J.M.C. (author), De Wit, J.H.W. (author)

journal article 2009

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Detecting the influence of land use changes on discharges and floods in the Meuse River Basin - the predictive power of a ninety-year rainfall-runoff relation?

Ashagrie, A.G. (author), De Laat, P.J.M. (author), De Wit, M.J.M. (author), Tu, M. (author), Uhlenbrook, S. (author)

journal article 2006

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Corrosion Performance of Composite Galvanic Coatings with Variable Concentration of Polymeric Nanoaggregates and/or Cr(III) Conversion Layers

Koleva, D.A. (author), Taheri, P. (author), Tsvetkova, N. (author), Boshkov, N. (author), Van Breugel, K. (author), De Wit, J.H.W. (author), Mol, J.M.C. (author)

This paper reports on the corrosion performance of composite zinc layers (~ 8µm) on a steel substrate, considering the influence of nano-aggregates and Cr(III) conversion layers, compared to control (only Zn layers) conditions. The main factors, influencing the corrosion performance of Zn in this study are: a) the effect of two concentrations of...

journal article 2011

document

Electrochemical Performance of Low-Carbon Steel in Alkaline Model Solutions Containing Hybrid Aggregates

Koleva, D.A. (author), Hu, J. (author), De Wit, J.H.W. (author), Boshkov, N. (author), Radeva, T. (author), Milkova, V. (author), Van Breugel, K. (author)

This work reports on the electrochemical performance of low-carbon steel electrodes in model alkaline solutions in the presence of 4.9.10-4 g/l hybrid aggregates i.e. cement extract, containing PDADMAC (poly (diallyl, dimethyl ammonium chloride) / PAA (Poly (acrylic acid)/ PDADMAC over a CaO core. The main objective was to determine if the...

journal article 2010

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Electrochemical and Microstructural Studies in Reinforced Mortar, Modified with Core-Shell Micelles

Koleva, D.A. (author), Van Breugel, K. (author), Boshkov, N. (author), Mol, J.M.C. (author), De Wit, J.H.W. (author)

This work reports on monitoring chloride-induced corrosion in reinforced mortar specimens, with and without addition of polymeric nano-aggregates in the mortar mixture. The investigation is a novel approach to control steel corrosion in reinforced concrete, hereby reporting the preliminary results, related to one of the main objectives: studying...

journal article 2010

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Electrochemical Impedance and Potentio-Dynamic Polarization of Construction Steel in Cement Extract, Containing Red Mud and Chloride Contamination

Koleva, D.A. (author), Copuroglu, O. (author), Van Breugel, K. (author), De Wit, J.H.W. (author)

journal article 2008

document

Bond Strength Degradation Due to Impressed Current Cathodic Protection in Reinforced Concrete

Koleva, D.A. (author), Copuroglu, O. (author), Van Breugel, K. (author), De Wit, J.H.W. (author)

journal article 2006

document

The art of screening: Effectiveness of silt screens

Radermacher, M. (author), Van der Goot, F. (author), Rijks, D.C. (author), De Wit, L. (author)

One of the potential environmental issues associated with dredging in the marine environment is the increase of suspended sediment concentrations (SSC) by generation and dispersion of sediment plumes. This can be mitigated by source control or by the installation of containment barriers like silt screens. This article focusses on hanging silt...

journal article 2013

document

Cathodic Protection or Cathodic Prevention: Can We Optimize Efficiency and/or Reduce Side Effects?

Koleva, D.A. (author), Van Breugel, K. (author), De Wit, J.H.W. (author), Mol, A. (author)

journal article 2010

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Pulse and Steady DC Cathodic Prevention of Reinforced Mortar in Chloride Environment

Koleva, D.A. (author), Van Breugel, K. (author), Mol, J.M.C. (author), De Wit, J.H.W. (author)

journal article 2009

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Evacuation plan of the city of almere: Simulating the impact of driving behavior on evacuation clearance time

Tu, H. (author), Tamminga, G.F. (author), De Wit, J. (author), Van der Berg, W. (author)

The evacuation clearance time is one of the key indicators in an evacuation plan and is determined by the expected behavior of the endangered residents and roadway network characteristics. The city of Almere has developed an evacuation plan in case of the emergency of a flooding, but assumes a normal driving behavior of the evacuees. In this...

journal article 2010