Searched for: subject%3A%22Diffusion%255C+coefficient%22
(1 - 19 of 19)
document
Xu, Z. (author), Ye, G. (author)
One of the key problems that affect the durability of reinforced concrete structures is the corrosion of rebar induced by chloride. Despite the complicated transport mechanism of chloride ions in cementitious materials, diffusion is still the key mechanism of chloride ingress. The determination of the chloride diffusion coefficient will help to...
journal article 2023
document
Zou, Yingxue (author), Xu, Haiqin (author), Xu, S. (author), Chen, Anqi (author), Wu, Shaopeng (author), Amirkhanian, Serji (author), Wan, Pei (author), Gao, Xiang (author)
Moisture erosion is one of the key factors leading to asphalt pavement damage, and the erosion depth indicates the moisture damage level but it is usually neglected. In order to study the moisture erosion and the erosion depth, this study characterized the chemical structure, rheological property and adhesion property of asphalt at different...
journal article 2023
document
Kamat, Ameya (author), Abbas, Yawar (author), Blagojević, Andrija (author), van Casteren, Toine (author), Walraven, Joost (author)
Service life of concrete infrastructure is severely compromised because of chloride-induced corrosion and measuring the chloride content is crucial to determine the remaining service life. DuraCrete provides a chloride ingress model based on Fick’s 2nd law. Although the diffusion coefficient is modelled as a time-dependent variable, the...
conference paper 2021
document
Zhang, Jingxiao (author), Ma, Yuwei (author), Zheng, Jiazheng (author)
The widespread application of alkali-activated fly ash/slag (AAFS) concrete requires satisfaction of a series of performance criteria both from its early age properties (e.g. workability, strength) and long-term stability. In this study, long-term (till 180 days) natural chloride diffusion tests were conducted to evaluate the chloride diffusion...
conference paper 2021
document
Zhao, Jiaqi (author), Fan, Zhihong (author), Xiong, Jianbo (author)
The error function solution of Fick’s second law assumes the constant surface chloride concentration, when it is used to calculate the apparent average chloride diffusion coefficient in concrete during the exposure period. However, the surface chloride concentration in concrete often vary with time. The purpose of this study is to investigate...
conference paper 2021
document
Kamat, Ameya (author), Abbas, Yawar (author), Blagojevic, Andrija (author), van Casteren, Toine (author), Walraven, J.C. (author)
Service life of concrete infrastructure is severely compromised because of chloride-induced corrosion and measuring the chloride content is crucial to determine the remaining service life. DuraCrete provides a chloride ingress model based on Fick’s 2nd law. Although the diffusion coefficient is modelled as a time-dependent variable, the...
conference paper 2021
document
van Ginkel, G.J. (author), van Gisbergen, Bart (author), Redig, F.H.J. (author)
We study a model of active particles that perform a simple random walk and on top of that have a preferred direction determined by an internal state which is modelled by a stationary Markov process. First we calculate the limiting diffusion coefficient. Then we show that the ‘active part’ of the diffusion coefficient is in some sense maximal...
journal article 2021
document
Susanto, A. (author)
Stray current has become a main concern for many years due to its effect on (reinforced) concrete structures and underground infrastructures. It has been reported that stray current affects not only steel reinforcement embedded in concrete, but can also induce degradation of the cement-based matrix. Stray current causes an increase of...
doctoral thesis 2020
document
van den Berg, L. (author), van Loosdrecht, Mark C.M. (author), de Kreuk, M.K. (author)
Biofilm and granular sludge processes depend on diffusion of substrates. Despite their importance for the kinetic description of biofilm reactors, biofilm diffusion coefficients reported in literature vary greatly. The aim of this simulation study was to determine to what extent the methods that are used to measure diffusion coefficients...
journal article 2020
document
Turan, Deniz (author)
Thermoplastic polyurethane (PU) polymers with different chemical compositions were synthesized and casted to films, and their water vapor barrier properties at different range of relative humidity (RH) were characterized. The water vapor permeability (WVP) of packaging films is one of their most important properties to identify their...
journal article 2019
document
Tsimpanogiannis, Ioannis N. (author), Moultos, O. (author), Franco, Luís F.M. (author), Spera, Marcelle B.de M. (author), Erdös, M. (author), Economou, Ioannis G. (author)
We present a detailed overview of classical molecular simulation studies examining the self-diffusion coefficient of water. The self-diffusion coefficient is directly associated with the calculations of tracer or mutual diffusion coefficient of mixtures and, therefore, is a fundamental transport property, essential for an accurate description...
review 2019
document
Casares-Magaz, Oscar (author), Raidou, R.G. (author), Rørvik, Jarle (author), Vilanova Bartroli, A. (author), Muren, Ludvig P. (author)
Functional imaging techniques provide radiobiological information that can be included into tumour control probability (TCP) models to enable individualized outcome predictions in radiotherapy. However, functional imaging and the derived radiobiological information are influenced by uncertainties, translating into variations in individual TCP...
journal article 2018
document
Arbabi, V. (author), Pouran, B. (author), Weinans, Harrie (author), Zadpoor, A.A. (author)
Analytical and numerical methods have been used to extract essential engineering parameters such as elastic modulus, Poisson's ratio, permeability and diffusion coefficient from experimental data in various types of biological tissues. The major limitation associated with analytical techniques is that they are often only applicable to problems...
journal article 2016
document
Villamar Jorgge, J.A. (author)
In the present study, the effect of concentration, osmolality and charge of x-ray contrast agents on their diffusion and equilibrium distribution across different zones of cartilage was investigated. Full-thickness cartilage discs (Ø = 8.5 mm, n = 3) were extracted from healthy equine femoral condyle (n = 2). The diffusion of four different...
master thesis 2014
document
Giacomelli Penon, M. (author)
The original goal of this research was to investigate new ways of predicting the life-time expectancy of organic coatings. Two different approaches were studied for their feasibility. The first approach was to optimise an existing measurement device, or to build one, which is able to detect (physical or chemical) changes of a coating as early as...
doctoral thesis 2007
document
Mols, H.J.M.A. (author)
Gradients in sediment transport due to waves and currents cause coastal changes and sediment transport is an important subject in coastal engineering research. It is therefore necessary to predict the sediment transport rates in the coastal region. Various formulae are available to predict the sediment transport rates, for example the sediment...
master thesis 2001
document
Chen, C.H. (author), Kelder, E.M. (author), Jak, M.J.G. (author), Schoonman, J. (author), Chowdari, B.V.R. (author)
journal article 1996
document
Chen, C.H. (author), Buysman, A.A.J. (author), Kelder, E.M. (author), Schoonman, J. (author)
journal article 1995
document
van der Vooren, J. (author), Sanderse, A. (author)
A uniaxial flat front--"theory is presented for a gas loaded variable conductance heat pipe. The theory takes into account the inertial effects of the moving vapour, which can grow large under certain circumstances, but neglects the axial heat conduction of the wall and wick. A limited number of numerical examples indicates excellent agreement...
report 1980
Searched for: subject%3A%22Diffusion%255C+coefficient%22
(1 - 19 of 19)