Necmi YARBAŞI, Ekrem KALKAN

Freeze-Thaw Effect in Granular Soil Reinforced with Calcareous Portland Cement

The use of cement with additives to increase the strength values of fine and coarse-grained soils is becoming increasingly common today. Because cement with additives has become preferred in the construction industry due to the economy they provide and the low CO2 emissions in clinker production due to climatic changes. In this study, CEM II/A-LL 42.5 R, class limestone added cement produced according to the TS EN 197-1 standard was used in order to increase the freeze-thaw resistance of the granular soil. 5%, 10%, and 15% calcareous Portland cement (CPC) was added to the granular soil (GS) and compacted under standard proctor energy. After curing these three different rates for 1, 7, and 28 days, the freeze-thaw test was applied with -21C, +21C, 12 cycles, and 24 hours waiting time. As a result of freeze-thaw, the unconfined compressive strengths (UCS) of three different mixtures were determined with a uniaxial compression device according to three different curing times. As a result, the highest strength increase occurred in the 28-day cure and GS+5% CPC mixture of well over 100 percent. However, the lowest strength reduction rate before and after freezing-thawing was also found in the GS+5% CPC mixture with 9.30%.

Keywords:

Granular soil, Calcareous Portland Cement, Reinforcement Strength, Freeze-thaw,

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