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Rossi, E. (author), Polder, R.B. (author), Copuroglu, O. (author), Nijland, T.G. (author), Saviuja, B. (author)
Although reinforcement corrosion is a well-known issue, which are the locations of the steel/concrete interface most sensitive to pitting corrosion is still an unclear issue. In this study, X-ray computed tomography is used to characterize eight 20-years-old reinforced concrete cores naturally deteriorated due to chloride-induced corrosion. The...
article 2020
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Rossi, E. (author), Nijland, T.G. (author), Copuroglu, O. (author), Polder, R.B. (author), Savija, B. (author)
Although corrosion of reinforcement is a well-known issue for the construction industry, there are still open questions about some fundamentals of corrosion in reinforced concrete. These points include, among others, which are the most sensitive locations of the steel/concrete interface for pitting corrosion to initiate and to propagate. In this...
conference paper 2019
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Polder, R.B. (author), Geiker, M.R. (author)
Chloride induced reinforcement corrosion is increasing due to aging of concrete infra structure. Conventional repairs have poor durability and many fail after less than 10 years. For conven tional repair chloride contaminated concrete is removed, steel is cleaned and new concrete is applied. Leaving chiorides, eg. in pits, corrosion may re...
conference paper 2015
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Yang, Z. (author), Fischer, H. (author), Polder, R.B. (author)
In this paper, two types of modified hydrotalcites (MHT) were incorporated into cement mortars with two dosage levels (replacing 5% and 10% cement by mass). Designated testing programme including strength test, porosity test, and rapid chloride migration and diffusion test were employed to investigate the effect of modified hydrotalcites on...
article 2015
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Beushausen, H. (author), Alexander, M.G. (author), Basheer, M. (author), Baroghel-Bouny, V. (author), D'Andréa, R. (author), Gonçalves, A. (author), Gulikers, J. (author), Jacobs, F. (author), Khrapko, M. (author), Monteiro, A.V. (author), Nanukuttan, S.V. (author), Otieno, M. (author), Polder, R. (author), Torrent, R. (author)
bookPart 2015
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Souza, L.M.S. (author), Copuroglu, O. (author), Polder, R.B. (author)
Alkali-Silica Reaction (ASR) is a durability problem that affects numerous concrete structures woridwide. As the reaction progresses. it might lead to deleterious expansion and cracking. The addition of lithium into fresh concrete is already acknowledged as a preventive method. In existing structures, however, lithium would need to be driven...
conference paper 2015
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Polder, R.B. (author)
report 2015
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Klamer, E. (author), Gulikers, J. (author), van den Hondel, H. (author), Polder, R.B. (author)
Rijkswaterstaat heeft in het kader van onderhoud aan haar kunstwerken ruim 1500 koppen van voorgespannen liggers in circa 30 viaducten gerepareerd en voorzien van kathodische bescherming (KB). De liggerkoppen vertoonden matige tot zware schade als gevolg van wapeningscorrosie door het indringen van chloriden, waardoor het noodzakelijk was in te...
article 2014
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Polder, R.B. (author), Nijland, T.G. (author), de Rooij, M.R. (author), Larsen, C.K. (author), Pedersen, B. (author)
road environment in The Netherlands for nearly a century. The experience is good and structures with long service lives can be obtained, as has been shown by several field studies. This is caused by a high resistance against chloride penetration and a high electrical resistivity, demonstrated both in the field and in the laboratory. Due to the...
conference paper 2014
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Blom, K. (author), Groeneweg, T. (author), van Hulst, H. (author), Polder, R.B. (author), de Vries, H. (author)
Betonconstructies worden niet alleen ouder; het aantal dat een respectabele leeftijd bereikt, neemt de komende decennia zelfs drastisch toe. Er is dus veel kennis nodig ten behoeve van onderhoud, reparatie en eventuele vervanging van grote aantallen betonconstructies, mede onder invloed van sterk veranderende gebruikseisen. De huidige praktijk...
article 2014
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Yang, Z. (author), Fischer, H.R. (author), Cerezo, J. (author), Mol, J.M.C. (author), Polder, R.B. (author)
A carbonate form of MgAl hydrotalcite, Mg(2)Al-CO3 and its p-aminobenzoate (pAB) modified derivative, Mg(2)Al-pAB, were synthesized and characterized by means of XRD, FT-IR and TG/DSC. The anticorrosion behavior of Mg(2)Al-pAB was evaluated based on open circuit potential (OCP) of carbon steel in simulated concrete pore solution and on chloride...
article 2013
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Pacheco, J. (author), Çopuroǧlu, O. (author), Polder, R.B. (author)
Chlorides are responsible for initiating steel corrosion in reinforced concrete, the economically most important deterioration mechanism in concrete infrastructure. The quantification of chlorides is commonly performed by wet chemical analysis, e.g. acid dissolution and Volhard's titration. Energy-Dispersive X-Ray Spectrometry (EDS) is a...
conference paper 2013
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Yang, Z. (author), Fischer, H.R. (author), Polder, R.B. (author)
Modified hydrotalcites (MTHs) represent a group of technologically promising materials for addition to concrete to improve its durability in aggressive environment, owing to their low cost, relative simplicity of preparation, and plenty of unique composition variables that may be adopted. Up to date, a lot of academic work and commercial...
article 2013
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Yang, Z. (author), Fischer, H.R. (author), Polder, R.B. (author)
Modified Hydrotalcites (MHTs) represent a group of technologically promising materials for improving corrosion protection in concrete owing to their low cost, relative simplicity of preparation, and plenty of composition variables. Numerous academic and commercial studies on MHTs have been carried out, but few of them on cementious materials...
conference paper 2012
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Pacheco, J. (author), Polder, R.B. (author), Fraaij, A.L.A. (author), Mol, J.M.C. (author)
Cathodic Protection (CP) of steel in concrete has been used over the past decades in order to increase the remaining service life of concrete infrastructure. CP involves the application of an electrical current to the corroding reinforcing bars, thus stopping and preventing further corrosion. The application of current on the reinforcing steel...
conference paper 2012
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Polder, R.B. (author), Worm, D. (author), Courage, W. (author), Leegwater, G. (author)
Corrosion of reinforcing steel in concrete structures causes concrete cracking and steel diameter reduction, eventually resulting in loss of safety. Conventional repair means heavy, labour intensive and costly work and the required quality level is under economic pressure. Consequently, conventional repair is short lived in many cases. An...
conference paper 2012
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Yang, Z. (author), Fischer, H. (author), Polder, R. (author)
A carbonate form of Mg-Al-hydrotalcite and its p-aminobenzoate (pAB) modified derivative (i.e.,Mg(2)Al-pAB) were synthesized and characterized by means of XRD and FT-IR. The anticorrosion behavior was evaluated based on open circuit potential (OCP) of carbon steel in simulated concrete pore solution and chloride-exchange experiments. The...
conference paper 2012
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Yang, Z. (author), Fischer, H.R. (author), Polder, R.B. (author)
conference paper 2012
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Šavija, B. (author), Schlangen, E. (author), Pacheco, J. (author), Polder, R.B. (author)
Reliable methods for controlled cracking of reinforced specimens in laboratory conditions are needed in order to experimentally study chloride ingress and reinforcement corrosion in cracks. In the paper, the Modified Wedge Splitting Test (MWST) for specimen cracking is presented. The setup is thoroughly explained, and the implications of...
conference paper 2012
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Polder, R.B. (author)
Duurzaamheid van beton is een onderwerp dat veel belangstelling trekt: publicaties, studiedagen, discussies. Het gaat om definities, ontwerpfilosofie, materiaaleigenschappen, technische invulling, praktijkervaring, maatschappelijke ontwikkelingen, te stellen doelen en mogelijke oplossingen. Elders in dit nummer van Cement wordt verslag gedaan...
article 2012
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