Fracture Toughness of Compacted Cohesive Soils Using Ring Test

Harison, Jack A.; Hardin, Bryan D.; Mahboub, Kamyar C.

doi:10.1061/(asce)0733-9410(1994)120:5(872)

Cited by 95 publications

(33 citation statements)

References 12 publications

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“…The laboratory tests for various rocks and soils showed that the Mode I fracture toughness and the tensile strength of these materials were well related to each other [1,[14][15][16]. On the basis of all the experimental results already mentioned, an empirical relation between Mode I fracture toughness and tensile strength of rocks was established, as follows [17]:…”

Section: Relation Between Mode I Fracture Toughness and Tensile Strenmentioning

confidence: 99%

Rock Fracture and Rock Strength

Zhang

2016

Rock Fracture and Blasting

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Section: Relation Between Mode I Fracture Toughness and Tensile Strenmentioning

confidence: 99%

Rock Fracture and Rock Strength

Zhang

2016

Rock Fracture and Blasting

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“…George (1970) also indicated that the critical strain energy release rate (G c ) could also increase as the rate of shrinkage increases. But, Harison et al (1994) presented tests carried out on compacted cohesive soils and concluded that the soil fracture toughness (K Ic ) is almost independent of a range of external loading rates used. Although desiccation is self-induced loading in contrast to external loading, this inference may be valid for desiccation rate as well.…”

Section: Cracking Water Content (W C ) and Cracking Timementioning

confidence: 99%

Laboratory experiments on desiccation cracking of thin soil layers

2006

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This paper presents some experimental results on desiccation cracking tests conducted on thin layers of clay soils. Observation of the evolution of cracking patterns was examined to clarify the transient mechanisms of the crack formation of clay soils. Laboratory experimentation on desiccation cracking was carried out to examine experimentally the quantitative relationships between the characteristics of soil cracks and the prevailing controlling conditions. Five desiccation cracking tests for slurried clay soils were carried out using shrinkage moulds in a humidity chamber, which was capable of controlling relative humidity and temperature. The soil used in the experimental studies was residual basaltic clay and was classified as a highly reactive soil. In order to provide simple conditions for theoretical modelling, the tests were conducted in perspex and metal moulds with rectangular crosssections. The lengths of the moulds were considerably larger than their widths so that parallel cracking were generated in thin layers. In each cracking test, several rectangular moulds of different thicknesses and widths were used. Some of these tests were used for observation, crack initiation and evolution, and others for moisture content measurement during desiccation. The test results include evolution of the cracking pattern, influences of speed of desiccation and typical crack spacing to depth ratios for soil layers.

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“…has not been well defined to date. Harison et al (Harison et al, 1994) used a ring test to measure the mode I fracture toughness ( IC K ) of two compacted soils from Kentucky. They found IC K varied significantly with the soil type and water content.…”

Section: Toughness Of Pavement Materialsmentioning

confidence: 99%

Development of Longitudinal Cracks on Pavement over Shrinking Expansive Subgrade

Luo¹,

Prozzi²

2010

Road Materials and Pavement Design

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The volumetric change of expansive clays in pavement subgrade produces serious pavement distresses. Dry-land longitudinal cracking is one of the most prevalent pavement distresses due to expansive subgrade. However, the mechanism of the dry-land crack development has not been addressed in depth, and the propagation process of dry-land cracks has not yet been clarified. This paper investigates the mechanism of longitudinal crack developing at the pavement surface caused by expansive soils. The non-uniform matric suction change in the subgrade is simulated by a thermal expansion model in a finite element program, ABAQUS, to determine the shrinkage stresses in the subgrade soil and pavement structure. Numerical solution by the finite element program shows that the most likely location of shrinkage crack initiation in the subgrade is close to the pavement shoulder and close to the interface of the base and subgrade. Linear elastic fracture mechanics theory is used to analyze the crack propagation in the pavement. Compared to the fracture toughness of the pavement materials, the stress concentration at the initial shrinkage crack tip is large enough to drive the crack to propagate further. When the shrinkage crack propagates through the whole pavement structure, a longitudinal crack develops at the pavement surface close to the pavement shoulder.

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Fracture Toughness of Compacted Cohesive Soils Using Ring Test

Cited by 95 publications

References 12 publications

Rock Fracture and Rock Strength

Rock Fracture and Rock Strength

Laboratory experiments on desiccation cracking of thin soil layers

Development of Longitudinal Cracks on Pavement over Shrinking Expansive Subgrade

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