TY - GEN
T1 - Effect of air voids on the dilatation of mortar during freezing
AU - Sun, Z.
AU - Scherer, G. W.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - When a saturated porous body freezes, hydraulic pressure is produced by the 9% volume increase as water turns to ice; the magnitude of the resulting stress depends on the rate of growth and the permeability of the body. At the same time, crystallization pressure is exerted by the ice on the pore walls, with a magnitude that depends on the temperature and pore shape. If macroscopic air voids are present, ice formed in the voids creates suction in liquid in surrounding mesopores, which protects the body by imposing compressive stresses on the solid network. By combining data from calorimetry and differential mechanical analysis, it is possible to use poromechanics to account quantitatively for all of these effects.
AB - When a saturated porous body freezes, hydraulic pressure is produced by the 9% volume increase as water turns to ice; the magnitude of the resulting stress depends on the rate of growth and the permeability of the body. At the same time, crystallization pressure is exerted by the ice on the pore walls, with a magnitude that depends on the temperature and pore shape. If macroscopic air voids are present, ice formed in the voids creates suction in liquid in surrounding mesopores, which protects the body by imposing compressive stresses on the solid network. By combining data from calorimetry and differential mechanical analysis, it is possible to use poromechanics to account quantitatively for all of these effects.
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M3 - Conference contribution
AN - SCOPUS:84928111049
T3 - Poromechanics IV - 4th Biot Conference on Poromechanics
SP - 896
EP - 901
BT - Poromechanics IV - 4th Biot Conference on Poromechanics
A2 - Ling, Hoe I.
A2 - Smyth, Andrew
A2 - Betti, Raimondo
PB - DEStech Publications
T2 - 4th Biot Conference on Poromechanics
Y2 - 8 June 2009 through 10 June 2009
ER -