Searched for: author:"de Rooij, M.R."
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de Rooij, M.R. (author)
This summer, all over Europe, record temperatures have been measured. From my own country, the Netherlands, the people working at the various meteorology organisations never imagined that the temperature in more than half the country would reach above 40°C. And yet it did! Another example that the climate is changing
article 2019
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de Rooij, M.R. (author), Nijland, T.G. (author), Quist, W.J. (author), de Jong, N. (author)
In 2015 zijn TNO, de TU Delft en de Rijksdienst voor het Cultureel Erfgoed de programmatische samenwerking MonumentenKennis gestart. Deze loopt in eerste instantie voor de periode 2015-2018. Dit document is het jaarverslag van de samenwerking over 2018. Het is in drie gedeelten opgebouwd: eerst wordt een impressie gegeven van de activiteiten,...
report 2019
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van Breugel, K. (author), Polder, R.B. (author), de Rooij, M.R. (author)
For many concrete infrastructural works a service life of 80, 100 or 200 years is required. To convince owners and authorities that these requirements can be met probability-based models for service life predictions have been developed. These models are based on theoretical and experimental laboratory studies. Many of these models focus on the...
conference paper 2017
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de Rooij, M.R. (author)
Monumenten verdienen goed onderhoud. Een monument dat er prachtig bij staat, daar zij we trots op. Een monument waar de vellen vanaf vallen, daar schamen we ons voor. Daar moet iets aan gebeuren! En dan begint het: wanneer was de laatste keer ? Wat is er toen precies gedaan ? Is deze plek nu erger geworden of denk ik dat alleen maar ?
conference paper 2016
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de Rooij, M.R. (author)
This is a summary paper focused on the diagnosis of the alkali–aggregate reaction (AAR) in concrete in practice.
article 2016
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de Rooij, M.R. (author), Pipilikaki, P. (author)
Overheidsbeleid richting een circulaire economie en de Green
article 2016
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van Hees, R.P.J. (author), Nijland, T.G. (author), van 't Hof, J. (author), de Rooij, M.R. (author)
Het instandhouden van monumenten en historische binnensteden is van groot maatschappelijk belang. De leefbaarheid van steden, maar ook zaken als sociale veiligheid en culturele identiteit worden er in belangrijke mate door bepaald. Welzijn en welbevinden van mensen in stedelijke gebieden worden er door vergroot. Monumenten spelen een...
article 2016
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Polder, R.B. (author), de Rooij, M.R. (author), Larsen, C.K. (author), Pedersen, B. (author)
Blast furnace slag cement (BFSC) has been used in reinforced concrete structures in marine and road environment in The Netherlands for nearly a century. Experience is good and long service lives can be obtained. In Norway experience with BFSC is scarce. In The Netherlands, a high resistance against chloride penetration and a high electrical...
conference paper 2016
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de Rooij, M.R. (author), Nijland, T.G. (author)
Op woensdag 17 augustus 2016 heeft TNO per e-mail een verzoek ontvangen van ProRail om voor 2 september 2016 een voorlopig oordeel te geven over aanvullend onderzoek dat door Railinfra Solutions (RIS) is uitgezet bij Pelcon Materials & Testing ApS in Denemarken( Pelcon) aangaande microscopisch onderzoek aan betonnen kernen van de Tunnel...
report 2016
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de Rooij, M.R. (author), Mendonca Filho, F.F. (author)
In this article a trip is taken to characterize concrete through its hardened cement paste based on its microstructure. Optical microscopy is coupled to advanced image analysis, as well as statistical data analysis to characterize heterogeneous concrete material. The article takes a closer look at the determination of the w/c ratio through the...
conference paper 2015
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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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de Rooij, M.R. (author), Godart, B. (author)
Alkali-aggregate reaction in concrete is the name given to a group of reactions leading to expansion caused by a chemical reaction between the alkalis contained in the cement paste and certain reactive forms of (usually silica containing) minerals in the aggregates, see Figure 4.The alkalis in the pore solution are derived from the hydration of...
bookPart 2013
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de Rooij, M.R. (author)
bookPart 2013
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de Rooij, M.R. (author), Godart, B. (author)
For any existing structure, a routine inspection is ordinarily a starting point of a cyclic process to maintain the safety and reliability of the structure (Figure 9). It is part of an inspection process where detailed inspection and in depth investigation are important actions. This chapter covers review of existing records, field equipment and...
bookPart 2013
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Çopuroğlu, O. (author), Schlangen, E. (author), Nishiwaki, T. (author), van Tittelboom, K. (author), Snoeck, D. (author), de Belie, N. (author), de Rooij, M.R. (author)
There are many techniques to study materials. In this chapter the focus of
bookPart 2013
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de Rooij, M.R. (author), Godart, B. (author)
bookPart 2013
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de Rooij, M.R. (author), Godart, B. (author)
From the confirmation inspection and its subsequent test results the presence of AAR has either been confirmed or eliminated. Assuming the first outcome, the next step is to investigate the severity of the situation, see Figure 23. One should keep in mind that it is possible that some evidence of AAR may be found in concrete where siliceous...
bookPart 2013
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de Rooij, M.R. (author)
When routine inspection results, like examples given in the previous chapter, show indications which could point in the direction of AAR, it is a wise decision to bring in the specialists. As these specialists are normally brought in when something odd has been observed, the first step to be taken is to establish what the cause of the “strange”...
bookPart 2013
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de Rooij, M.R. (author), Godart, B. (author)
Diagnosis of damage to concrete in structures caused by Alkali-Aggregate Reaction (AAR) often involves complex processes because of the resemblance of the external characteristics of the damage with those caused by other actions, such as e.g. frost attack or shrinkage. The wide variety of aggregate types used in concrete worldwide, the different...
bookPart 2013
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de Rooij, M.R. (author), Valcke, S.L.A. (author), Visser, J.H.M. (author), TNO Bouw en Ondergrond (author)
article 2010
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