Hydraulic and Strength Performance of Three Cement-Stabilized Soils Subjected to Cycles of Freezing and Thawing

Reza J. Jamshidi, Craig B. Lake

In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNC

Session: Soil Stabilization II

ABSTRACT: This paper investigates the effect of freeze/thaw (f/t) cycles (12 cycles of freezing at -10±1oC and thawing at room temperatures) on the performance of three soils stabilized by addition of 10 percent Portland cement at different water to cement ratios (i.e. 1, 1.5 and 2). Also, the effect of curing time on the f/t resistance of the cement-stabilized soils was studied by exposing specimens from each mix design under fiimmaturefl (i.e. 16 days of curing prior to f/t exposure) and fimaturefl (over 110 days curing prior to f/t exposure) conditions. Hydraulic conductivity and unconfined compressive strength measurements were performed for unexposed and exposed f/t conditions. Hydraulic conductivity values for f/t exposed specimens were up to 5250 times higher than unexposed conditions. Reductions of up to 58 percent in compressive strength were observed compared to unexposed conditions. As well, for most cases mature specimen resulted in a higher degree of damage (in terms of hydraulic conductivity) compared to immature specimens.

RÉSUMÉ: Cette étude considère l'effet des cycles de gel/dégel (f/t) (12 cycles de geler à -10±1oC et dégeler aux températures ambiantes) sur la performance de trois sols stabilisée par addition de 10 pour cent ciment de Portland avec différentes ratios de l™eau et ciment .(i.e. 1, 1.5 et 2). Aussi, l'effet de guérir le temps sur la f/t résistance des sols-ciment stabilisés est étudié en exposant des échantillons de chaque mélange a design sous les conditions immature (i.e. 16 jours de guérir avant exposition du f/t) et mature (plus de 110 jours qui guérissent avant exposition du f/t). Conductivité hydraulique et la résistance en compression simple ont été dans des conditions non-exposés et exposés. Les valeurs de conductivité hydraulique de F / t échantillons exposés en étaient 5250 fois plus élevé que les conditions non-exposées. Des réductions allant jusqu'à 58 pour cent de la force de compression ont été observés par rapport aux conditions non-exposées. En outre, pour les plupart des cas, les échantillons matures ont donné lieu à un plus haut degré de dommage (en termes de conductivité hydraulique) par rapport aux échantillons immatures.

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Cite this article:
Reza J. Jamshidi; Craig B. Lake (2013) Hydraulic and Strength Performance of Three Cement-Stabilized Soils Subjected to Cycles of Freezing and Thawing in GEO2013. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GeoMon2013Paper312,author = Reza J. Jamshidi; Craig B. Lake,title = Hydraulic and Strength Performance of Three Cement-Stabilized Soils Subjected to Cycles of Freezing and Thawing,year = 2013}