Lesson learned from weathering clay shale residual interface shear strength testing method

Clay shale has been a problematic soil due to its weathering characteristic. Weathering is the degradation of shear strength due to exposure to water and air. As the depth of soil increases, the weathering effect would decrease, leading to different weathering grades. On a slope, the different weath...

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Main Authors: Fathiyah Hakim Sagitaningrum, Fathiyah Hakim Sagitaningrum, Kamaruddin, Samira Albati, Nazir, Ramli, Budi Susilo Soepandji, Budi Susilo Soepandji, Alatas, Idrus M.
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Published: 2023
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Online Access:http://eprints.utm.my/107947/
http://dx.doi.org/10.1007/978-981-16-9348-9_46
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Institution: Universiti Teknologi Malaysia
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spelling my.utm.1079472024-10-17T06:08:55Z http://eprints.utm.my/107947/ Lesson learned from weathering clay shale residual interface shear strength testing method Fathiyah Hakim Sagitaningrum, Fathiyah Hakim Sagitaningrum Kamaruddin, Samira Albati Nazir, Ramli Budi Susilo Soepandji, Budi Susilo Soepandji Alatas, Idrus M. TA Engineering (General). Civil engineering (General) Clay shale has been a problematic soil due to its weathering characteristic. Weathering is the degradation of shear strength due to exposure to water and air. As the depth of soil increases, the weathering effect would decrease, leading to different weathering grades. On a slope, the different weathering grades would lead to an interface slope failure. Until now, laboratory methods on finding the interface shear strength between the weathering grades seldom been investigated. This research will propose a method and give an evaluation of the results. An interface direct shear test has been conducted until its residual state between an undisturbed clay shale and weathering clay shale. The weathering condition of the bottom clay shale is achieved by soaking and drying the bottom of the sample using a two-days wetting-drying cycle. Results showed scattered values with different behavior for the soaked and unsoaked conditions for increasing weathering days. The soaked condition resulted in an increasing cohesion, increasing average stress ratio, and decreasing friction angle. The unsoaked condition resulted in decreasing cohesion, increasing friction angle, and increasing average stress ratio. Previous research shows that, the residual shear stress should have decreased as the weathering days increases. The cause for the contrary results is due to soil swelling and the absence of a separator when weathering the bottom clay shale. In conclusion, the test conducted is not quite suitable to understand the interface shearing behavior of weathering clay shale. Thus, a modification is suggested for future research according to the identified causes. 2023 Conference or Workshop Item PeerReviewed Fathiyah Hakim Sagitaningrum, Fathiyah Hakim Sagitaningrum and Kamaruddin, Samira Albati and Nazir, Ramli and Budi Susilo Soepandji, Budi Susilo Soepandji and Alatas, Idrus M. (2023) Lesson learned from weathering clay shale residual interface shear strength testing method. In: 5th International Conference on Rehabilitation and Maintenance in Civil Engineering, ICRMCE 2021, 8 July 2021 - 9 July 2021, Virtual, Surakarta, Indonesia. http://dx.doi.org/10.1007/978-981-16-9348-9_46
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Fathiyah Hakim Sagitaningrum, Fathiyah Hakim Sagitaningrum
Kamaruddin, Samira Albati
Nazir, Ramli
Budi Susilo Soepandji, Budi Susilo Soepandji
Alatas, Idrus M.
Lesson learned from weathering clay shale residual interface shear strength testing method
description Clay shale has been a problematic soil due to its weathering characteristic. Weathering is the degradation of shear strength due to exposure to water and air. As the depth of soil increases, the weathering effect would decrease, leading to different weathering grades. On a slope, the different weathering grades would lead to an interface slope failure. Until now, laboratory methods on finding the interface shear strength between the weathering grades seldom been investigated. This research will propose a method and give an evaluation of the results. An interface direct shear test has been conducted until its residual state between an undisturbed clay shale and weathering clay shale. The weathering condition of the bottom clay shale is achieved by soaking and drying the bottom of the sample using a two-days wetting-drying cycle. Results showed scattered values with different behavior for the soaked and unsoaked conditions for increasing weathering days. The soaked condition resulted in an increasing cohesion, increasing average stress ratio, and decreasing friction angle. The unsoaked condition resulted in decreasing cohesion, increasing friction angle, and increasing average stress ratio. Previous research shows that, the residual shear stress should have decreased as the weathering days increases. The cause for the contrary results is due to soil swelling and the absence of a separator when weathering the bottom clay shale. In conclusion, the test conducted is not quite suitable to understand the interface shearing behavior of weathering clay shale. Thus, a modification is suggested for future research according to the identified causes.
format Conference or Workshop Item
author Fathiyah Hakim Sagitaningrum, Fathiyah Hakim Sagitaningrum
Kamaruddin, Samira Albati
Nazir, Ramli
Budi Susilo Soepandji, Budi Susilo Soepandji
Alatas, Idrus M.
author_facet Fathiyah Hakim Sagitaningrum, Fathiyah Hakim Sagitaningrum
Kamaruddin, Samira Albati
Nazir, Ramli
Budi Susilo Soepandji, Budi Susilo Soepandji
Alatas, Idrus M.
author_sort Fathiyah Hakim Sagitaningrum, Fathiyah Hakim Sagitaningrum
title Lesson learned from weathering clay shale residual interface shear strength testing method
title_short Lesson learned from weathering clay shale residual interface shear strength testing method
title_full Lesson learned from weathering clay shale residual interface shear strength testing method
title_fullStr Lesson learned from weathering clay shale residual interface shear strength testing method
title_full_unstemmed Lesson learned from weathering clay shale residual interface shear strength testing method
title_sort lesson learned from weathering clay shale residual interface shear strength testing method
publishDate 2023
url http://eprints.utm.my/107947/
http://dx.doi.org/10.1007/978-981-16-9348-9_46
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