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 oC, +21 oC, 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%.