Influence of Freeze–Thaw Cycles on Physical and Mechanical Properties of Cement-Treated Silty Sand

Abstract

The problem of weak ground conditions is currently of great interest, as with the rapid development of infrastructure, researchers are trying to cope with the improvement of problematic soil properties to build structures on it. In cold regions, the problem of weak soils is further exacerbated by freeze–thaw cycling. For the improvement of soil properties, the soil stabilization method using ordinary Portland Cement (OPC) is commonly applied, but it produces a significant amount of carbon dioxide emissions. Therefore, the purpose of this research study is to present laboratory testing results for the evaluation of soil treatment using Calcium Sulfoaluminate (CSA) cement that has a lesser carbon footprint. On stabilized soil specimens cured for 3, 7, and 14 days and subjected to freeze–thaw cycles, unconfined compressive strength (UCS) and ultrasonic pulse velocity (UPV) testing were performed. Samples were prepared at optimum moisture content using different cement content, 3%, 5%, and 7%. Applying the results from the UCS test, the strength loss/gain and resilient modulus of treated soil were obtained. The test results show that the strength and pulse velocity values decreased with the increase of freeze–thaw cycles. However, improvement in soil performance can be observed with the increase in cement content. Overall, the use of CSA as a stabilizer for silty sand would be useful to achieve sufficient strength of subgrade.

Pengaruh Penambahan Serbuk Karet dan Serbuk Cangkang Telur Terhadap Parameter Tanah Lempung pada Pengujian Konsolidasi dan Kuat Geser Langsung

“…Di daerah dengan iklim dingin, tanah mengalami pembekuan dan pencairan siklik, yang kemudian menyebabkan perubahan struktur dan sifat tanah, yang selanjutnya menyebabkan potensi hilangnya kekuatan tanah. Pengaruh siklus beku-cair pada tanah, terutama pada tanah bermasalah, dapat mengurangi kekuatan ultimit tanah, dan mempengaruhi resilient modulus, volume, kompresibilitas, daya dukung, dan struktur mikro dari tanah (Sagidullina et al, 2022).…”

Effects of Freeze-Thaw Cycles on Permeability Behavior and Desiccation Cracking of Dalian Red Clay in China Considering Saline Intrusion

“…It is of great concern to investigate the effect of F-T cycles on the hydro-mechanical properties of clayed soils in frozen regions [14,15]. Regarding the variation of physical and mechanical properties, it is universally accepted that the void ratio of dense soils increases with F-T cycles and permeability coefficient always increases, without considering the volumetric changes.…”

Mechanical Properties and Microscopic Mechanism of Basic Oxygen Furnace (BOF) Slag-Treated Clay Subgrades

“…However, there is a growing interest in environmentally friendly alternatives for soil stabilization. An example of an alternative option is calcium sulfoaluminate (CSA) cement, a non-traditional stabilizer that possesses environmentally beneficial characteristics while also retaining effective soil stabilization capabilities [5][6][7][8][9]. Also, byproduct stabilizers, such as rice husk ash and lignin, are considered cost-effective and environmentally friendly substitutes for traditional and non-traditional stabilizers in various civil engineering applications [10][11][12][13].…”