Abstract
As an ionic soil stabilizer (ISS) can effectively reduce the expansive properties of bentonite and sand can improve the strength of a soil rapidly thereby reducing the likelihood of cracks, in the present study, these two methods are combined to strengthen bentonite. Different experiments are carried out and the results confirm that the proposed strategy can effectively be used to improve the properties of this material. It is also shown that the sand-to-bentonite mass ratio has different effects on the unconfined compressive strength (UCS) of the SB (sand strengthened) and ISB (ISS-sand composite strengthened bentonite) samples. The UCS of these two samples both attenuates significantly after one freeze-thaw cycle and then display only minor changes after multiple cycles.
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