Searched for: author%3A%22Polder%2C+R.B.%22
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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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Polder, R.B. (author), Peelen, W.H.A. (author), Raupach, M. (author), Reichling, K. (author)
This paper investigates the economic effects of full corrosion surveys of concrete structures. The background is that the existing concrete infrastructure is aging, while being exposed to aggressive influences, which increases the occurrence of corrosion and related concrete damage over time. The central proposition is that solely relying on...
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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Polder, R.B. (author), Snijder, H.H. (author)
report 2013
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Polder, R.B. (author)
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), Souza, L.M.S. (author)
Alkali-silica reaction (ASR) is a deleterious mechanism known to affect several concrete structures worldwide. During this process, alkali ions present in the pore solution react with reactive components of the aggregate particle and, as a result a hygroscopic gel is formed. The produced gel absorbs water from the surrounding cement paste and...
conference paper 2012
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Polder, R.B. (author), Fischer, H. (author), Yang, Z. (author)
Two modified hydrotalcites (MHTs) intercalated with nitrate and aminoben-zonate anions, (i.e., CaAl-MHT-NO3 and CaAl-MHT-pAB) have been synthesized. The intercalation of CaAl-MHT-pAB was achieved by anion exchange of nitrate in the host material, CaAl-MHT-NO3, which was prepared by a coprecipitation method. Materials characterization was...
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.R. (author), Polder, R.B. (author)
conference paper 2012
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Pacheco, J. (author), Çopuroǧlu, O. (author), Šavija, B. (author), Schlangen, E. (author), Polder, R.B. (author)
Reinforcement corrosion is the most important deterioration mechanism in concrete infrastructure. Chlorides contained in saltwater or de-icing salts penetrate through the concrete cover activating corrosion. When left unattended, corrosion leads to cracking and spalling of concrete cover, reducing the structure's service life. The amount of...
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
document
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. In een vorig nummer van Cement is ingegaan op...
article 2012
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Polder, R.B. (author), Peelen, W.H.A. (author), Courage, W.M.G. (author)
Based on construction dates and observed time to corrosion induced damage, the future need for repair of reinforced concrete motorway bridges in The Netherlands is predicted. Due to the age distribution and in particular the relatively short life of conventional repairs, the need for maintenance will increase steeply over the next few decades....
article 2012
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Yang, Z. (author), Fischer, H.R. (author), Polder, R.B. (author)
A carbonate form of Mg-Al-hydrotalcite with Mg/Al =2 and its p-aminobenzoate (pAB) modified derivative were synthesized and characterized by means of XRD, IR and TG/DSC. Mg(2)Al-CO3 was prepared by a coprecipitation method and was subsequently modified by pAB through the calcination-rehydration technique. The results from the relevant...
conference paper 2012
document
Yang, Z. (author), Fischer, H.R. (author), Polder, R.B. (author)
A carbonate form of Mg-Al-hydrotalcite with Mg/Al = 2 and its p-aminobenzoate (pAB) modified derivative have been synthesized and characterized by means of XRD, IR and TG/DSC. Mg(2) Al-CO 3 was prepared by a coprecipitation method and was subsequently modified by pAB through the calcination-rehydration technique. The results from the relevant...
conference paper 2012
document
Polder, R.B. (author), Leegwater, G. (author), Worm, D. (author), Courage, W. (author)
Corrosion of reinforcing steel in concrete structures causes concrete cracking, steel diameter reduction and eventually loss of safety. In infrastructure this is mainly due to penetration of chloride ions from de-icing or marine salts. Conventional repair means heavy, labour intensive and costly work, and economic pressures (time and money) work...
conference paper 2012
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