Development of a Large-Scale Infiltration Tank for Determination of the Hydraulic Properties of Expansive Clays

Tang, Anh Minh; Ta, An-Ninh; Cui, Yu‐Jun; Thiriat, Jérémy

doi:10.1520/gtj102187

Cited by 19 publications

(2 citation statements)

References 51 publications

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“…Subsequently, when the tensile strength is equal to the tensile stresses, cracks begin to develop. Generally, soils are highly complex materials; the desiccation cracking behavior is controlled by several factors such as the composition of the mineral, clay content, relative humidity, degree of temperature, the thickness of the layer, and boundary conditions, [4,5,6,7,8,9,10].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Wetting-Drying Cycles on Desiccation Crack Pattern and Soil Behavior

Al-Jeznawi

Sánchez

Al-Taie

2020

KEM

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Cracking, shrinkage, and curling of soils, in general, take place due to drying. These deformations lead to many problems include the development of main paths for water flow and pollutant transport, reduction of soil strength (and impact on other mechanical properties of soils), erosion in slopes, landslides, increase infiltration capacity of the soil and the differential settlement problems. Few studies have investigated the effect of wetting-drying (W-D) cycles on desiccation cracks of soils. The effect of multiple wetting-drying cycles in the cracking behavior was investigated in this research by performing several wetting-drying (W-D) cycles on the initially saturated samples (of pure kaolinite and a mixture of kaolinite with bentonite) under the lab atmosphere (24 ± 1 °C, and 52 ± 2% of RH). The weight of each sample was monitored using a computerized scale (with an accuracy of 0.01 g) connected to the computer. During the test, the water evaporation path with the development of surface cracks and volume shrinkage was monitored by means of digital images. It was observed that the crack patterns changed during the initial cycles, but there was an equilibrium state in the third and fourth W-D cycles. Additionally, it was observed that the main cracks formed in the first dry path were virtually closed after 10 minutes of the second wetting path; in the meantime, small cracks (fissures) were initiated after this wetting process. It was, also, detected that soils with high plasticity required more W-D cycles to reach the equilibrium condition than soils with low plasticity. The results of these experiments are useful for understanding the effect of different seasons on soil behavior.

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Section: Introductionmentioning

confidence: 99%

“…Eventually, it is necessary to improve our knowledge on the development and propagation of desiccation cracks in soils. Several researchers worked on the hydro-mechanical behavior of clayey soils under wetting-drying cycles [8,11,12,13]. Few studies have researched the effect of wetting-drying cycles on desiccation cracks [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Wetting-Drying Cycles on Desiccation Crack Pattern and Soil Behavior

Al-Jeznawi

Sánchez

Al-Taie

2020

KEM

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Studying the effect of drying on soil hydro-mechanical properties using micro-penetration method

Tang

Shi

2016

Environ Earth Sci

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Understanding the hydro-mechanical response of soil during drying is significant for predicting and preventing the possible disasters related to drought climate. In this investigation, a novel micro-penetrometer was developed to characterize and quantify the drought-induced soil hydro-mechanical response based on the penetration curves, which present the variation of soil strength along depth. The relationships between the penetration resistance and soil water content, and the penetration resistance and soil suction were initially calibrated. It is found that the penetration resistance increases exponentially with decreasing water content as the soil is subjected to drying, while increases linearly with increasing suction. Before the air-entry value is reached, the drying-induced increment of soil strength is insignificant even a large amount of water is evaporated. During this stage, soil strength and water content along depth are generally uniform, and the increment of soil strength is consistent at any depth. After the air-entry value is reached, soil strength increases rapidly even water content decreases slightly. The distribution of soil strength along depth becomes non-uniform. It generally decreases exponentially with increasing depth due to the drying-induced water content and suction gradient. The predicted water content profile based on the penetration results was compared with the measured one, and good agreement was observed. It indicates that the proposed micro-penetration test can be used to characterize the hydro-mechanical response of soil during drying.

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