Searched for:
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document
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
document
Polder, R.B. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (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
document
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
document
Lindqvist, J.E. (author), Nijland, T.G. (author), von Konow, T. (author), Plesser, T.S.W. (author), Nyman, P. (author), Larbi, J. (author), van Hees, R.P.J. (author), TNO Bouw en Ondergrond (author)
report 2006
document
Nijland, T.G. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author)
article 2005
document
Larbi, J.A. (author), van Hees, R.P.J. (author), Naldini, S. (author), TNO Bouw (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
document
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
document
Larbi, J.A. (author), Visser, J.H.M. (author), TNO Bouw (author)
Various studies have indicated that the use of some ultra-accelerated mortar bar expansion test methods for assessing the alkali-silica reactivity of concrete aggregates (particularly those using 1 M NaOH solution at 80 oC) can give rise to misleading results causing certain types of aggregates to be inappropriately accepted. This is the case if...
article 2002
document
Larbi, J.A. (author), TNO Bouw (author)
article 2002
document
Nijland, T.G. (author), Larbi, J.A. (author), TNO Bouw (author)
Concrete is a poor conductor of heat. Nevertheless, heating of concrete results in physico-chemical conditions shifting in or out the thermodynamic stability field of specific phases (minerals) in the concrete, effectuating their (dis)appearance. Metamorphic petrology is a branch of geology that deals with the study of such changes; as a basic...
article 2001
document
Stoop, B.T.J. (author), Larbi, J.A. (author), Heijnen, W.M.M. (author)
It is shown that it is possible to produce compacted gypsum with a low porosity and a high strength on a laboratory scale by uniaxial compaction of flue gas desulphurization (FGD-) gypsum powder. Compacted FGD-gypsum cylinders were produced at a compaction pres-sure between 50 and 500 MPa yielding porosities after compaction between 21 and 6%...
article 1996
document
Heijnen, W.M.M. (author), Larbi, J.A. (author), Siemes, A.J.M. (author)
conference paper 1996
document
Polder, Rob B. (author), Larbi, Joe A. (author), TNO Bouw (author)
TNO Building and Construction Research investigated reinforced concrete prisms submerged in the North Sea for 16 years. The aim was to examine the effects of this potentially aggressive environment on the mechanical properties and the durability of reinforced concrete. It was found that (deep) sea does not constitute a severe environment for...
article 1996
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