A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Irreversible dilation of NaCl contaminated lime-cement mortar due to crystallization cycles
The mechanism of damage occurring in NaCl contaminated materials has not been clarified yet. Apart from crystallization pressure, other hypotheses have been proposed to explain the cause of decay. Irreversible dilation has been observed in a few cases but has never been studied in a more systematic way. The aim of the research is to contribute to the modeling of this phenomenon. In the present paper the effect of NaCl on the hydric and hygric behavior of a lime-cement mortar is extensively studied. The results indicate that NaCl influences the hydric and hygric dilation behavior of the material. The material contaminated with NaCl shrinks during dissolution and dilates during crystallization of the salt. This dilation is irreversible and sufficient to damage the material after few dissolution/crystallization cycles. This behavior is not restricted to NaCl, but is observed in the presence of other salts as well (NaNO 3 and KCl). Outcomes of electron microscopy studies suggest that salts causing irreversible dilation tend to crystallize as layers on the pore wall.
Irreversible dilation of NaCl contaminated lime-cement mortar due to crystallization cycles
The mechanism of damage occurring in NaCl contaminated materials has not been clarified yet. Apart from crystallization pressure, other hypotheses have been proposed to explain the cause of decay. Irreversible dilation has been observed in a few cases but has never been studied in a more systematic way. The aim of the research is to contribute to the modeling of this phenomenon. In the present paper the effect of NaCl on the hydric and hygric behavior of a lime-cement mortar is extensively studied. The results indicate that NaCl influences the hydric and hygric dilation behavior of the material. The material contaminated with NaCl shrinks during dissolution and dilates during crystallization of the salt. This dilation is irreversible and sufficient to damage the material after few dissolution/crystallization cycles. This behavior is not restricted to NaCl, but is observed in the presence of other salts as well (NaNO 3 and KCl). Outcomes of electron microscopy studies suggest that salts causing irreversible dilation tend to crystallize as layers on the pore wall.
Irreversible dilation of NaCl contaminated lime-cement mortar due to crystallization cycles
Lubelli, B. (author) / Van Hees, R.P.J. (author) / Huinink, H.P. (author) / Groot, C.J.W.P. (author)
Cement and Concrete Research ; 36 ; 678-687
2006
10 Seiten, 17 Quellen
Article (Journal)
English
Irreversible dilation of NaCl contaminated lime–cement mortar due to crystallization cycles
| Online Contents | 2006
Irreversible dilation of NaCl contaminated lime–cement mortar due to crystallization cycles
| British Library Online Contents | 2006
Hygric dilation behaviour of NaCl contaminated lime-cement mortar
| British Library Conference Proceedings | 2007