ENGINEERING PROPERTIES OF CEMENT-TREATED SILTY SAND SUBJECTED TO FREEZE THAW CYCLES
Loading...
Date
2022
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Nazarbayev University School of Engineering and Digital Sciences
Abstract
The problem of soft ground is currently of great interest, as with the rapid development of
infrastructure, researchers are trying to cope with the improvement of properties of problematic
soil to build structures on it since any structures built on weak soils can be easily damaged. In cold
regions, the problem of weak soils is further exacerbated by freeze-thaw cycling, resulting in
reduced soil strength. For the improvement of soil properties, the soil stabilization method can be
used. For such purposes, ordinary Portland Cement (OPC) is commonly used. However, despite
the effectiveness of OPC cement as a binding material, it produces a significant amount of carbon
dioxide emission. As an alternative to OPC, calcium sulfoaluminate (CSA) cement can be used.
Therefore, the purpose of this research study is to present the results from laboratory experiments
to evaluate the effectiveness of the soil treatment method using CSA cement for the improvement
of the properties of silty sand. The unconfined compressive strength (UCS) and ultrasonic pulse
velocity (UPV) testing conducted on the soil samples that were cured for 3, 7, and 14 days and
subjected to 0, 1, 3, 5, 7, 10, and 15 freeze-thaw cycles. The water content is defined from the
optimum moisture content and three different cement content were used, 3%, 5%, and 7%.
Applying the results from the unconfined compressive strength (UCS) test, the strength loss/gain
and resilient modulus parameters were obtained. The findings of the study show that the strength
and pulse velocity values decreased with the exposure of soil specimens to cyclic freezing and
thawing. However, improvement in soil performance can be observed with the use of CSA cement.
Overall, the application of CSA cement for treatment purposes could be an effective method to
enhance soil performance and meet the subgrade design requirements.
Description
Keywords
Citation
Sagidullina, N. (2022). ENGINEERING PROPERTIES OF CEMENT-TREATED SILTY SAND SUBJECTED TO FREEZE THAW CYCLES. Nazarbayev University School of Engineering and Digital Sciences