Searched for: author%3A%22Polder%2C+R.B.%22
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Polder, R.B. (author), Morales-Napoles, O. (author), Pacheco, J. (author)
Statistical tests on values of concrete resistivity can be used as a fast tool for estimating the cement type of old concrete. Electrical resistivity of concrete is a material property that describes the electrical resistance of concrete in a unit cell. Influences of binder type, water-to-binder ratio, moisture and temperature can be detected by...
conference paper 2012
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Valcke, S.L.A. (author), Polder, R.B. (author), Nijland, T.G. (author), Leegwater, G.A. (author), Visser, J.H.M. (author), Bigaj-van Vliet, A.J. (author)
Most high filler concrete studies are based on relatively high contents of powder (cement + filler) (>400 kg m-3). This paper aims to increase the total fly ash content relative to the clinker content, while simultaneously minimizing the total powder content in the concrete to values lower than 300 kg m-3. The motivation for decreasing the total...
article 2012
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Caballero, J. (author), Polder, R.B. (author), Leegwater, G.A. (author), Fraaij, A.L.A. (author)
Modern service life design methods for concrete structures use chloride diffusion data as an input parameter. Abundant data exist for concrete at 28 days and, to a lesser extent, at later ages. This paper presents chloride diffusion data for mortar at ages between 1 day and 28 days age. Rapid Chloride Migration (RCM) and natural diffusion tests...
article 2012
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Osterminski, K. (author), Polder, R.B. (author), Schiessl, P. (author)
Against the background of immense costs of repair or replacement of concrete structures degraded by reinforcement corrosion, a strong interest in industry and research can nowadays be found in the underlying processes and in possibilities to influence them. As a part of the reinforcement corrosion circuit, the resistivity of concrete is a...
article 2012
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van der Wegen, G. (author), Polder, R.B. (author), van Breugel, K. (author)
Nowadays major structures require a service life of 100 years or even more. CUR committee VC81 has developed a guideline for service life design based on initiation of corrosion due to chloride penetration for exposure classes XD or XS. A semi-probabilistic simplification of the DuraCrete methodology is introduced with a probability of failure of
article 2012
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Polder, R.B. (author)
A review is given of research on the durability performance of concrete made with blast furnace slag and fly ash related to chloride induced reinforcement corrosion, carried out in the Netherlands, where slag has been used in cement for almost a century. Results are presented from field studies on concrete in marine environment and laboratory...
article 2012
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Polder, R.B. (author)
Rob Polder is al ruim 25 jaar actief in de wereld van de civiele techniek. Toch is hij geen Delftse ingenieur, maar een chemicus uit Utrecht, die bovendien in Wageningen is gepromoveerd. Hij gedijt evenwel uitstekend in de wereld van ‘laarzen in de blubber’ en ‘handen uit de mouwen’. Hij heeft het nu zelfs geschopt tot deeltijdhoogleraar aan de...
article 2011
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Polder, R.B. (author), Gieskens, B. (author), Bouwmeester, J. (author), Orgers, M. (author)
article 2011
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Polder, R.B. (author), van der Wegen, G. (author), van Breugel, K. (author)
Tegenwoordig kunnen betonconstructies in chloridehoudend milieu worden ontworpen op levensduur. De vereiste prestatie van het beton kan proefondervindelijk worden bepaald. Op basis van eerdere ervaringen is de methode DuraCrete zodanig aangepast dat een levensduurontwerp nu kan worden gemaakt op drie niveaus: met behulp van ontwerptabellen, semi...
article 2011
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Polder, R.B. (author), Leegwater, G.A. (author), Bouwmeester, W.J. (author), Lollini, F. (author), TNO Bouw en Ondergrond (author)
article 2010
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Valcke, S.L.A. (author), Polder, R.B. (author), Nijland, T.G. (author), Leegwater, G.A. (author), Visser, J.H.M. (author), Bigaj-Van Vliet, A.A.J. (author)
The strength of concrete is linked to the amount of cement used. In many applications, concrete has a considerably higher strength than designed and structurally required. Lowering cement contents, thus reducing strength, significantly reduces the ecological impact of any concrete in terms of raw materials use and CO 2 output. A lower cement...
conference paper 2010
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Polder, R.B. (author), Neeft, E.A.C. (author), Leegwater, G.A. (author), TNO Bouw en Ondergrond (author)
article 2010
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Polder, R.B. (author), Peelen, W.H.A. (author), Neeft, E.A.C. (author), Stoop, B.T.J. (author), TNO Bouw en Ondergrond (author)
Over the last 25 years, cathodic protection (CP) of reinforced concrete structures suffering from chloride induced reinforcement corrosion has shown to be successful and durable. CP current causes steel polarisation, electrochemical reactions and ion transport in the concrete. CP systems are designed based on experience, which results in...
article 2010
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Polder, R.B. (author), van der Wegen, G. (author), van Breugel, K. (author), TNO Bouw en Ondergrond (author)
article 2010
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Valcke, S.L.A. (author), Polder, R.B. (author), Nijland, T.G. (author), Leegwater, G.A. (author), Visser, J.H.M. (author), Bigaj-van Vliet, A.J. (author), TNO Bouw en Ondergrond (author)
conference paper 2010
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Leegwater, G.A. (author), Polder, R.B. (author), Caballero, J. (author), Fraaij, A. (author), TNO Bouw en Ondergrond (author)
article 2010
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Polder, R.B. (author), Leggedoor, J. (author), Schuten, G. (author), Sajna, S. (author), Kranjc, A. (author), TNO Bouw en Ondergrond (author)
Cathodic protection delivers corrosion protection in concrete structures exposed to aggressive environments, e.g. in de-icing salt and marine climates. Working lives of a large number of CP systems are at least more than 13 years and probably more than 25 years, provided a minimum level of maintenance is applied. This involves routine checks of...
conference paper 2010
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Polder, R.B. (author), Farias, J.P. (author), TNO Bouw en Ondergrond (author)
article 2010
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van Breugel, K. (author), Polder, R.B. (author), TNO Bouw en Ondergrond (author)
conference paper 2009
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Nijland, T.G. (author), Polder, R.B. (author), van Zon, Q.F. (author), TNO Bouw en Ondergrond (author)
public lecture 2009
Searched for: author%3A%22Polder%2C+R.B.%22
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