Pressures developed during the unidirectional freezing of water-saturated porous materials

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Pages14011412; # of pages: 12
Subjectfrost heaving; ice; porosity; materials
AbstractA new experimental apparatus is being used that permits the measurement of developing pressures during the freezing process in the environment of a small temperature gradient. Studies with pads of nearly uniform-size glass beads (in the micron range) indicate that after an ice lens has developed the ice-water interfacial energy, computed from the measured pressures and the pore geometry of glass bead pads, ranges between 30 and 35 ergs/cm(2). The supporting theory assumes that such pressures arise because of the curved interfaces between the ice lens and water, ice and porous solid, and water and solid according to Everett's model. Freezing experiments with pads of well-graded spheres (1-30 mu) show the significance of the smaller pores in the porous system in determining the magnitude of pressures developed during ice lens growth. The study has been extended to soils and some common building materials.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number10383
NPARC number20374196
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Record identifier06247c7d-fb24-4433-a02b-8f56162177d6
Record created2012-07-23
Record modified2016-05-09
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