Foundation Problems and Pyrite Oxidation in the Chattanooga Shale, Estill County, Kentucky

Anderson, Warren H.

doi:10.13023/kgs.ri18.12

Cited by 1 publication

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“…Pyrite oxides when shale is excavated or used as a foundation material. Pyrite is very sensitive to humidity, whereas even a very small amount of water can lead to the Pyrite reaction [1]. Pyrite problems are observed as swelling shale bedrock affects the foundations and concrete slab on grade of buildings.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Ground Penetrating Radar for Pyrite Swelling Detection in Soils

KhoderAgha,

Assaf

2024

Civ Eng J

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Pyrite swelling in soils below buildings is a major issue. It leads to severe deformations in floor foundations. A survey is carried out at a selected site in the city of Laval, Quebec, to assess the usefulness of ground-penetrating radar (GPR) to detect deformations that may be indicative of the presence of pyrite. Four soil samples are taken from the aforementioned site to determine the soil type below the concrete slab. The results indicate the presence of limestone, moor clay, and shale sediments, which are prone to pyrite swelling. The GPR data were collected using the GSSI SIR 4000 with a high frequency antenna and processed using RADAN software. The GPR data indicate the presence of severe deformation in many locations of the concrete slab. The most important wave reflections indicative of pyrite swelling are the rebar reflections, showing interesting pushed-up and dropped-down reflections. These reflections appear in two forms. The first is the attenuated reflections that may occur due to pyrite-rich materials. The second is the high amplitude reflections that occur because of the air void, which can be formed due to heaving the concrete slab because of pyrite swelling. As a result, GPR appears to be an effective method for assessing and mapping the effect of pyrite swelling below concrete slabs. Doi: 10.28991/CEJ-2024-010-03-05 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

“…For instance, it took approximately 20 years to diagnose that the swelling problems in Quebec City were caused by pyrite [3]. Similarly, numerous cases of concrete heaving due to pyrite swelling have been reported in the UK [4], Ireland [2], the USA [1], and Japan [5].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Ground Penetrating Radar for Pyrite Swelling Detection in Soils

KhoderAgha,

Assaf

2024

Civ Eng J

View full text Add to dashboard Cite

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Foundation Problems and Pyrite Oxidation in the Chattanooga Shale, Estill County, Kentucky

Cited by 1 publication

References 4 publications

Assessment of Ground Penetrating Radar for Pyrite Swelling Detection in Soils

Assessment of Ground Penetrating Radar for Pyrite Swelling Detection in Soils

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