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Impacts of Coal Char Content and Curing Temperature on Properties of Cement-Stabilized Soil for Transportation Applications

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Veröffentlicht in:Transportation Infrastructure Geotechnology vol. 12, no. 1 (Jan 2025), p. 59
Veröffentlicht:
Springer Nature B.V.
Schlagworte:
pH
Compressive strength
Coal transport
Stabilization
Soil temperature
Moisture content
Low temperature
Transportation engineering
Soil
Coal
Performance enhancement
Soils
Curing
Pyrolysis
High temperature
Concrete
Cement
Water content
Soil investigations
Soil strength
Soil properties
Bulk density
Transportation applications
Stabilizing
Soil stabilization
Soil improvement
Curing (processing)
Physical properties
Environmental
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Abstract:Cement soil stabilization is widely used for improving engineering properties of weak soils. It is important to acknowledge the limitations of cement-soil stabilization under various temperature conditions, e.g., cracking at elevated temperatures and limited strength development at low temperatures. Recent studies have explored the use of coal char, a byproduct of pyrolysis, as a potential additive or filler, demonstrating promising results in improving the performance of cement-based construction materials. However, the effects of coal char incorporation on the properties of cement-stabilized soils under different curing temperatures remain unclear. This study investigates the effects of coal char in cement-soil stabilization under four different curing temperatures (i.e., − 23, 5, 20, and 35 ºC). Specifically, the physical properties (i.e., water content, pH, and bulk density), strength, microstructural, and mineralogical properties of cement-stabilized and char-cement-stabilized soils are examined. At low temperatures, − 23 and 5 ºC, the changes in water content, pH, and bulk density are less significant than 20 and 35 ºC for stabilized soils. The compressive strength of char-cement-stabilized soil is higher than that of cement-stabilized soil across various curing times and temperatures. The results of this study demonstrate the promising potential of coal char in enhancing the engineering performance of soil cured at various temperatures, which could improve the performance of transportation structures.
ISSN:2196-7202
2196-7210
DOI:10.1007/s40515-024-00521-4
Quelle:Engineering Database