Author: Edward V. Gant
Publisher:
ISBN:
Category : Frost heaving
Languages : en
Pages : 44
Book Description
Research Report on Studies of Frost Action in Soils as a Function of Selected Soil Properties, Climatic Factors, and Elevation of Ground Water Table
Author: Edward V. Gant
Publisher:
ISBN:
Category : Frost heaving
Languages : en
Pages : 44
Book Description
Publisher:
ISBN:
Category : Frost heaving
Languages : en
Pages : 44
Book Description
Effect of Soil Properties and Climatic Conditions on Frost Action in Soils
Author: Md Fyaz Sadiq
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 0
Book Description
In clod regions, frost action can significantly impact roadway performance due to frost heave and thaw settlement of the subgrade soils. The severity of the damage depends on the soil properties, temperature, freeze-thaw cycles, and water availability. While nominal expansion occurs with the phase change from pore water to ice, heaving is derived primarily from a continuous water flow from the vadose zone to growing ice lenses. The temperature gradient within the soil influences water migration towards the freezing front during winter, where ice nucleates, coalesces into lenses, and grows. When the temperature increases during the spring season, the ice melts, inducing thaw settlement and causing a reduction in soil strength. This study investigated the effect of soil properties, including the gradation and soil thermal properties (thermal conductivity, specific heat, thermal diffusivity), on the frost susceptibility of soils from Iowa and North Carolina through the laboratory frost heave and thaw settlement test. Total heave, heave rate, temperature profile, frost penetration depth, and frost penetration rate were measured as a function of time. The results showed that soils that had higher silt content had higher heaving. Maximum frost penetration rate was observed for soils with higher thermal diffusivity. Moreover, the impact of climatic conditions on frost heave was assessed by conducting tests under varying conditions of water availability (open vs. closed system), multiple freeze-thaw cycles, and temperature gradients. It was observed that the presence of an external water source significantly increased the magnitude of heave, resulting in a seven times higher total heave compared to those soils in a closed system. The soil specimens experienced a continuous increase in heave until the sixth freeze-thaw cycle, after which it stabilized. The freezing process caused the soil specimens to exhibit a high rate of water intake, which decreased during thawing. Under extended freezing periods, both soils showed the maximum total heave when subjected to a lower temperature gradient. The silty sand/silty clay soil experienced more significant frost heave and water intake volume compared to low plasticity clay, owing to its high hydraulic conductivity.
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 0
Book Description
In clod regions, frost action can significantly impact roadway performance due to frost heave and thaw settlement of the subgrade soils. The severity of the damage depends on the soil properties, temperature, freeze-thaw cycles, and water availability. While nominal expansion occurs with the phase change from pore water to ice, heaving is derived primarily from a continuous water flow from the vadose zone to growing ice lenses. The temperature gradient within the soil influences water migration towards the freezing front during winter, where ice nucleates, coalesces into lenses, and grows. When the temperature increases during the spring season, the ice melts, inducing thaw settlement and causing a reduction in soil strength. This study investigated the effect of soil properties, including the gradation and soil thermal properties (thermal conductivity, specific heat, thermal diffusivity), on the frost susceptibility of soils from Iowa and North Carolina through the laboratory frost heave and thaw settlement test. Total heave, heave rate, temperature profile, frost penetration depth, and frost penetration rate were measured as a function of time. The results showed that soils that had higher silt content had higher heaving. Maximum frost penetration rate was observed for soils with higher thermal diffusivity. Moreover, the impact of climatic conditions on frost heave was assessed by conducting tests under varying conditions of water availability (open vs. closed system), multiple freeze-thaw cycles, and temperature gradients. It was observed that the presence of an external water source significantly increased the magnitude of heave, resulting in a seven times higher total heave compared to those soils in a closed system. The soil specimens experienced a continuous increase in heave until the sixth freeze-thaw cycle, after which it stabilized. The freezing process caused the soil specimens to exhibit a high rate of water intake, which decreased during thawing. Under extended freezing periods, both soils showed the maximum total heave when subjected to a lower temperature gradient. The silty sand/silty clay soil experienced more significant frost heave and water intake volume compared to low plasticity clay, owing to its high hydraulic conductivity.
Factors Related to Frost Action in Soils
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Frost
Languages : en
Pages : 120
Book Description
Publisher:
ISBN:
Category : Frost
Languages : en
Pages : 120
Book Description
Bibliography on Frost Action in Soils, Annotated
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Frost
Languages : en
Pages : 74
Book Description
Publisher:
ISBN:
Category : Frost
Languages : en
Pages : 74
Book Description
Frost Action in Soils
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 406
Book Description
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 406
Book Description
Bibliography on Frost Action in Soils, Annotated
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Frost
Languages : en
Pages : 64
Book Description
Publisher:
ISBN:
Category : Frost
Languages : en
Pages : 64
Book Description
Soil Behavior Associated with Freezing
Author: National Research Council (U.S.). Highway Research Board. Annual Meeting
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 132
Book Description
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 132
Book Description
Factors Influencing Ground Freezing
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Frost heaving
Languages : en
Pages : 176
Book Description
Publisher:
ISBN:
Category : Frost heaving
Languages : en
Pages : 176
Book Description
The Nature of Frost Action
Author: National Research Council of Canada. Division of Building Research
Publisher:
ISBN:
Category : Frost
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category : Frost
Languages : en
Pages : 28
Book Description
Frost Action in Soils
Author: National Research Council (U.S.). Highway Research Board
Publisher: National Academy Press
ISBN: 9780309020657
Category : Frost heaving
Languages : en
Pages : 88
Book Description
Eight papers describe the continuing struggle to overcome frost problems: 1) freezing and heaving of saturated and insaturated soils; 2) predicting unfrozen water contents in frozen soils from surface area measurements; 3) use of the ice-water surface tension concept in engineering practice; 4) chemical additives to reduce frost heave and water accumulation in soils; 5) frost heaving versus depth to water table; 6) influence of freezing rate on frost heaving; 7) frost and sorption effects in argillaceous rocks; 8) pressure-time relationship in laterally stressed frozen granular soils.
Publisher: National Academy Press
ISBN: 9780309020657
Category : Frost heaving
Languages : en
Pages : 88
Book Description
Eight papers describe the continuing struggle to overcome frost problems: 1) freezing and heaving of saturated and insaturated soils; 2) predicting unfrozen water contents in frozen soils from surface area measurements; 3) use of the ice-water surface tension concept in engineering practice; 4) chemical additives to reduce frost heave and water accumulation in soils; 5) frost heaving versus depth to water table; 6) influence of freezing rate on frost heaving; 7) frost and sorption effects in argillaceous rocks; 8) pressure-time relationship in laterally stressed frozen granular soils.