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van Hees, R.P.J. (author), Dubelaar, C.W. (author), Nijland, T.G. (author), TNO Bouw en Ondergrond (author)
conference paper 2005
document
van Hees, R.P.J. (author), Nijland, T.G. (author), Larbi, J.A. (author), Wijffels, T.J. (author), Brocken, H.J.P. (author), TNO Bouw en Ondergrond (author)
The characterisation of two ancient mortars in historic bridges, suffering damage due to thaumasite and other swelling compounds is described. Characterisation was part of the analysis of damage occurring to the brick masonry structure. Expansive reactions were found to have taken place, being the cause of the damage to the masonry. In both...
conference paper 2005
document
van Hees, R.P.J. (author), Dubelaar, C.W. (author), Nijland, T.G. (author), TNO Bouw en Ondergrond (author)
Nederland is geen echt natuursteenland. Binnen de huidige grenzen wordt feitelijk alleen in de provincie Limburg natuursteen gewonnen voor toepassing in gebouwen: een zachte geelwitte kalksteen, in Nederland bekend als mergel, in België als Maastrichter steen. Wel werd altijd veel natuursteen van elders gehaald. Zeer bekend zijn de tufsteen uit...
bookPart 2005
document
TNO Bouw (author), van Hees, R.P.J. (author), Brendle, S. (author), Nijland, T.G. (author), de Haas, G.J.L.M. (author), Tolboom, H.J. (author)
Rhenish tuffs (Eifel, Getmany), have been used as building material in the Netherlands since Roman times. They were the most important natural building stone in the Netherlands in early medieval times. In addition, tuff was used as raw material for production of trass, that served as a pozzolanic addition for mortars. Rhenish tuffs, notably...
article 2003
document
TNO Bouw (author), Nijland, T.G. (author), Dubelaar, C.W. (author), van Hees, R.P.J. (author), van der Linden, T.J.M. (author)
Black weathering of sandstone in monuments is widespread. Some obiects owe their name to it, like the Porta Nigra in Triet (Germany). Other than the black gypsum crusts common on limestone, the black weathering layer on sandstone is rather thin and well adhe¡ent. Formation of such layers on Bentheim and Obernkirchen sandstone, both widely used...
article 2003
document
TNO Bouw (author), Nijland, T.G. (author), Brendle, S. (author), van Hees, R.P.J. (author), de Haas, G.J.L.M. (author)
Rhenish tuffs from the volcanic Eifel region, Germany, have widely been used as building stone in the Netherlands. Different kinds of tuff (Römer, Weiberner, Ettringer, Riedener) show different kinds of decay, and also within each group, remarkable differences in weathering behaviour occur. In the present study, a short introduction is given to...
article 2003
document
TNO Bouw (author), Nijland, T.G. (author), Wijffels, T.J. (author)
Decisions about the cleaning of natural stone should always be made within the awareness of direct and indirect damage that may be the result of cleaning. During the last decade, laser cleaning of objects and monuments of natural stone has become increasingly popular. Whereas a considerable amount of literature has been devoted to the effect of...
article 2003
document
TNO Bouw (author), Nijland, T.G. (author), van Hees, R.P.J. (author)
article 2003
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