- document
-
Lubelli, B. (author), Nijland, T.G. (author), van Hees, R.P.J. (author)A test procedure was set up to reproduce laboratory self-healing on lime-based (both pure calcium and magnesium-calcium) mortar specimens. After a few months of testing, during which time the specimens were submitted to wet-dry cycles, thin sections of the specimens were prepared and observed using a polarization and fluorescence microscope (PFM...article 2012
- document
- Nijland, T.G. (author) public lecture 2012
- document
-
Nijland, T.G. (author)Over veel steensoorten die in de bouw gebruikt zijn, is met de loop der jaren een algemeen beeld ontstaan. De steen is goed of slecht, weerbestendig of niet. Dergelijke veralgemeende steenbeelden bestonden al in de oudheid. Lang niet altijd doet het veralgemeend steenbeeld recht aan de daadwerkelijke prestaties van de steen. Een interessant...public lecture 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
- Nijland, T.G. (author), Erich, S.J.F. (author), Adan, O.C.G. (author), Faiyas, A.P.A. (author), Huinink, H.P. (author) public lecture 2012
- document
- van Hees, R.P.J. (author) public lecture 2012
- document
-
van Hees, R.P.J. (author), Groot, C. (author), van Balen, K. (author), Bicer-Simsir, B. (author), Binda, L. (author), Elsen, J. (author), von Konow, T. (author), Lindqvist, J.E. (author), Maurenbrecher, P. (author), Papayanni, I. (author), Subercaseaux, M. (author), Tedeschi, C. (author), Toumbakari, E.E. (author), Thompson, M. (author)Mortar has been in use for many thousands of years and is integral to most masonry construction. Its use is widespread in every culture where masonry is constructed. It is present in the majority of the global built cultural heritage, and is therefore a major consideration in building conservation. The effective design of a mortar for repairing...article 2012
- document
-
Nijland, T.G. (author), van Hees, R.P.J. (author), Quist, W. (author)Delft is alom bekend van de Oude en de Nieuwe Kerk, beiden (deels) opgetrokken door bouwmeesters/ steenhouwers van het roemruchte Brabantse geslacht Keldermans en deels in de onvermijdelijk met deze bouwmeesters verbonden witte zandige kalksteen, meestal Lede of Balegemse steen genoemd. Met name aan de Oude Kerk is echter ook nogal wat...bookPart 2012
- document
-
Havermans, J.B.G.A. (author)Desinfecteren met gammastralen is niets nieuws. In de farmaceutische, gezondheids- en voedingsindustrie wordt deze techniek al vele jaren succesvol toegepast. Wat zijn de mogelijkheden voor het archiefwezenarticle 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
- document
-
Visser, J.H.M. (author), van Zon, Q.F. (author)In 2010, an inventory to the performance of repairs in the Netherlands has been executed, in response to reported low performances of repairs in Europe. Extensive records were collected concerning, among other, the age of the repairs and their current conditions in a similar way as in the European inventory conducted five years earlier. The...conference paper 2012
- document
-
Giezen, C. (author), Leegwater, G.A. (author)TNO heeft een literatuurstudie uitgevoerd naar de internationaal beschikbare kennis over de invloed van het wegontwerp op brandstofverbruik van voertuigen. De resultaten zijn gepresenteerd aan de GWW-sector om na te3 gaan of het mogelijk is brandstofbesparende wegdekken in te voerenarticle 2012
- document
-
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
- document
-
Pacheco, J. (author), Polder, R. (author)The major degradation mechanism in civil engineering concrete structures is corrosion of reinforcement due to chloride penetration. Corrosion reduces serviceability and safety due to cracking and spalling of concrete and loss of steel cross section. Recently, service life design has moved from prescriptive performance based. The current approach...conference paper 2012
- document
-
van Hees, R.P.J. (author), Groot, C. (author), Hughes, J.J. (author), van Balen, K. (author), Bicer-Simsir, B. (author), Binda, L. (author), Elsen, J. (author), von Konow, T. (author), Lindqvist, J.E. (author), Papayanni, I. (author), Subercaseaux, M. (author), Tedeschi, C. (author), Toumbakari, E.E. (author), Thompson, B. (author)This paper gives a summary of functional and performance requirements for repointing mortars for historic masonry (design, execution and maintenance). Successful performance of repair and conservation of mortar in historic masonry requires more care with design and execution than with modern masonry.article 2012
- document
-
Nijland, T.G. (author), Copuroglu, O. (author), Heinemann, H.A. (author)Before the general acceptance of Portland cement as the main binder for concrete in the late 19th century, other, locally available binders were occasionally used. In the case of the Netherlands, which did not produce Portland cement, traditional lime-based binders were not uncommon. With a strong tradition of trass production, trass-lime...article 2012
- document
-
Kuisch, H. (author), Gard, W. (author), Botter, E. (author), van de Kuilen, J.-W. (author)Brittleheart is a well-known phenomenon in many tropical wood species which reduces the strength properties considerably. According to national strength grading standards such as BS 5756 and NEN 5493, timber with brittleheart has to be rejected. In many cases, however, brittleheart is not visible on the outer surface and the cross section of...conference paper 2012
- document
-
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
- document
-
García, Á. (author), Schlangen, E. (author), van de Ven, M. (author), van Vliet, D. (author)The objective of this research is to examine the induction heating of mastic through the addition of electrically conductive fillers and fibers (graphite and steel wool), and to prove that this material can be healed with induction energy. The effect of fibers content, sand-bitumen ratio and the combination of fillers and fibers on the induction...article 2011
- document
-
van Meel, P.A. (author), Erich, S.J.F. (author), Huinink, H.P. (author), Kopinga, K. (author), DE Jong, J. (author), Adan, O.C.G. (author)Moisture accumulation inside wood causes favorable conditions for decay. Application of a coating alters the moisture sorption of wood and prevents accumulation of moisture. This paper presents the results of a nuclear magnetic resonance (NMR) study on the influence of a coating on the moisture absorption of wood. NMR allows to determine both...article 2011