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- Valcke, S.L.A. (author), Nijland, T.G. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author) conference paper 2010
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Nijland, T.G. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author)Concrete petrography is the integrated microscopic and mesoscale (hand specimen size) investigation of hardened concrete, that can provide information on the composition of concrete, the original relationships between the concrete's various constituents, and any changes therein, whether as a result of ageing or damage processes. Concrete...bookPart 2010
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Valcke, S. (author), Nijland, T.G. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author), BenO (author)The water cement (w/c) ratio is a typical quality parameter for concrete. The NT Build 361 Nordtest method is a standard for estimating the w/c ratio in hardened concrete and is based on the relationship between the ilc ratio and the capillary porosity in the cement paste. The latter can be estimated using fluorescent light microscopy of...conference paper 2009
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- van Hees, R.P.J. (author), Nijland, T.G. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author) conference paper 2009
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- Koster, T. (author), Peelen, W.H.A. (author), Larbi, J.A. (author), de Rooij, M.R. (author), Polder, R.B. (author), TNO Bouw en Ondergrond (author) article 2009
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- TNO Bouw en Ondergrond (author), Nijland, T.G. (author), Larbi, J.A. (author) article 2009
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- Koster, T. (author), Peelen, W.H.A. (author), Larbi, J.A. (author), de Rooij, M.R. (author), Polder, R.B. (author), TNO Bouw en Ondergrond (author) conference paper 2008
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- Larbi, J.A. (author), Siemes, A.J.M. (author), Polder, R.B. (author), TNO Bouw en Ondergrond (author) bookPart 2008
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Nijland, T.G. (author), Larbi, J.A. (author), van Hees, R.P.J. (author), Lubelli, B.A. (author), de Rooij, M.R. (author), TNO Bouw (author)A microscopic survey of over 1000 of samples of concrete and masonry mortars from structures in the Netherlands shows that, in practice, self healing occurs in historic lime and lime – puzzolana mortars, in contrast to modern cement bound concretes and mortars. Self healing may be effected by the formation of either new Ca-carbonate, CaCO3, or...conference paper 2007
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TNO Bouw en Ondergrond (author), Nijland, T.G. (author), Larbi, J.A. (author), de Rooij, M.R. (author), Polder, R.B. (author)Use of Rhenish trass in (historic) lime mortars is well known. However, its application to concrete has not been investigated elaborately. In the past, trass was used as a pozzolanic addition to concrete for marine structures in the Netherlands. Recent investigations of several structures have shown that identification of trass in aged concretes...article 2007
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TNO Bouw en Ondergrond (author), Polder, R.B. (author), Larbi, J.A. (author)Explosive spalling of pieces of concrete from the heated surface is considered to be the most dangerous effect of damage of concrete subjected to intense fire attack, especially when it occurs in restricted areas such as underground tunnels. Recent investigations have revealed that the amount of explosive spalling and the extent of cracking can...article 2007
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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
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- Nijland, T.G. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author) article 2005
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- Nijland, T.G. (author), Wijffels, T.J. (author), Dubelaar, C.W. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author) article 2005
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Lubelli, B. (author), van Hees, R.P.J. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author)The quality of the materials constituting masonry has a major influence on the type and seriousness of the damage that can occur due to salt crystallization. In the case of brick, the composition of the original clay, together with the production process, determine the quality of the final product and it's eventual susceptibility to salt decay....conference paper 2005
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Nijland, T.G. (author), Larbi, J.A. (author), Siemes, A.J.M. (author), TNO Bouw (author)An overview is given of experience of alkali-silica reaction, ASR, in the Netherlands, reflecting on concrete mixes and aggregates involved, and the assessment of ASR affected structures. Recently published guidelines to prevent concrete damage due to ASR are introduced. These rely on limiting the effective amount of alkali available for...conference paper 2003
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TNO Bouw (author), Larbi, J.A. (author), van Hees, R.P.J. (author), Naldini, S. (author)This paper deals with the use of an integrated microscopic method to assist in the investigation of the causes and the extent of decay of the stones and ornaments in the gothic Clurch of Out Lady in Breda, The Netherlands. The purpose of the study was to determine whether conservation measures were necessary. As part of the investigation 8...article 2003
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TNO Bouw (author), Larbi, J.A. (author)The mechanical properties and the durability of natural building stones are influenced to a large extent by inherent inhomogeneities. One of such inhomogeneities is a stylolite, particularly when it occuts in carbonate-rich rocks. Stylolites are irregular surfaces in which small tooth-like projections on one side of the surface fit into cavities...article 2003
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Larbi, J.A. (author), TNO Bouw (author)During the past decade, several cases of damage of concrete structures due to alkali-silica reaction, ASR, have been diagnosed, detected, reported or published in The Netherlands [Heijnen and Larbi, 1999]. The structures involved include bridges, locks, balconies and viaducts (see Figure 1). This called for a critical review of the existing...conference paper 2002
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Pietersen, H.S. (author), Larbi, J.A. (author), TNO Bouw (author)In the current Dutch standard NEN 5905 and CUR Recommendation 38, four methods are listed for assessing the alkali-silica reactivity of concrete aggregates. However, procedures outlining how the tests should be performed, and the possible errors associated with such tests, are not given. This makes interpretation of results obtained by any of...conference paper 2002