Akademik Veri Yönetim Sistemi
ACE 2014, İstanbul, Türkiye, 21 - 25 Ekim 2014, ss.1-6
To investigate the effects of the frost action on the compacted soils, soil samples recovered from several regions
apart from each other was chosen for this study. The dry unit weight and optimum water content of the soil
samples were determined by Standard Proctor test in the range of 15.0 kN/m³ and 21.0 kN/m³, and 12% and 24%
respectively. In the laboratory the soil samples were compacted at their optimum water content by using standard
proctor energy and then they were saturated. In a cold chamber these soil samples were subjected to two freeze
and thaw cycles lasting totally 120 hours at temperatures varying between -12°C and +12°C as suggested by
ASTM D5918. During freezing cycles, the amounts of frost heave were observed. The determined heave rates
were discussed with respect to maximum dry unit weight, final water content and void ratio. The soil samples
with higher maximum dry unit weight illustrated lower heave rates. On the other hand higher final water content
and void ratio leads higher values of heave rate. Furthermore thaw weakening susceptibility of the soil samples
were also determined by comparing their California Bearing Ratio (CBR) results performed before and after
freeze and thaw process. The results showed that the CBR values for all the samples illustrated a reduction in the
range of 21% and 86% after freeze and thaw processes. It was observed that the maximum reduction in the CBR
value was belongs to the soil which has the highest liquid limit value.