The Correlation of Exposure Time and Claystone Properties at the Warukin Formation Indonesia

Supandi, Supandi

doi:10.21660/2018.52.68175

Cited by 17 publications

(16 citation statements)

References 19 publications

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“…The correlation between clays and mechanical characteristics of claystone has been studied by many researchers [1][2][3] but the effect of the type of clay minerals on mechanical properties of rocks is poorly understood. However, change in the physical properties of the clastic sedimentary rocks can have a profound influence on their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Kaolinite - Illite toward mechanical properties of Claystone

et al. 2019

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This study investigates the relationship between clay minerals (kaolinite and illite) and rock properties of the claystone, including both mechanical (cohesion, friction angle, stress, and strain) and physical properties (natural water content, void ratio, and wet density), belonging to Warukin Formation of Kalimantan, Indonesia. Mineralogical characteristics of these rocks were studied using petrological and X-ray diffraction techniques, whereas the mechanical and physical properties were tested by conducting uniaxial and triaxial tests. Relationship among the variables was determined using correlation coefficients. It was observed that the mineralogy of the rocks pose strong constraints on their engineering properties. The results showed that an increase in illite content decreases cohesion, friction angle, strength, and safety factor; and increases natural moisture content, void ratio, and wet density. Although illite content of these rocks was just about 10.8% of the total minerals, it has significantly contributed to the modification of physical and mechanical properties. In contrast, kaolinite did not have a significant impact; since the correlation between various parameters was significantly low (correlation coefficient was much less, <0.3). Therefore while selecting the materials for geotechnical engineering applications, illite emerges as a safer alternative to kaolinite, especially when its concentration is less than 10.8% of the total rock mass.

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Section: Introductionmentioning

confidence: 99%

The Influence of Kaolinite - Illite toward mechanical properties of Claystone

et al. 2019

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“…The research was conducted at one of the creek diversions in South Kalimantan, Indonesia, which is located right beside a public road. In general, the materials at research location are in the Warukin formation which is composed of sandstones, claystones, and coal with low hardness [19][20][21][22]. The sandstones are composed of clay-to-sand-sized quartz sandstones with brownish gray color [23].…”

Section: Methodsmentioning

confidence: 99%

Simple Slope Stabilization on Quartz Sandstone using Horizontal Drain

Supandi

2021

IJE

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Maintaining stability of public facilities, especially public roads, is very necessary, so the stabilization efforts must be carried out. The water from seepage that comes out of sandstone layer carries material with fine particles and this causes the rock cohesion to decrease and thus leading to scouring. As a result of the scouring, the layer becomes overstep and can disturb road stability. This study was conducted to provide simple but measurable recommendation for maintaining road stability after the previous stabilization effort failed. The method used a fluid mechanics approach in which water from the formation was given space to come out of the formation without carrying fine particles (cement). The analysis was carried out using the finite element method by installing horizontal drain pipe. The result of analysis shows that the horizontal drain installation helps water to come out without creating an overstep layer. The recommended horizontal drain is 8 m long with a slope of at least 3% and a length of 1 m that must enter the sandstone formation as a water source. With this method, the road stability can be maintained and the stabilization can be carried out in an easy, inexpensive, and applicable way.

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“…Catatan penting yang diperoleh dari analisis sifat fisik tahan lekang yang bertujuan untuk menganalisis potensi degradasi suatu batuan adalah nilai tahan lekang satuan batulempung sekitar 5,5% termasuk dalam kategori durabilitas sangat rendah atau bahkan diklasifikasikan sebagai material non-durable [11]. Penelitian lain mengenai degradasi sifat teknik batulempung akibat terekspos oleh air dan cuaca menunjukkan bahwa kohesi batuan dapat turun lebih dari 50% dalam waktu sekitar 1 tahun [16]. Berdasarkan data indeks plastisitas, terutama dari sampel inti bor yang dianalisis di tekMIRA diperoleh nilai 33,27 (tinggi-sangat tinggi) dan 79,89 (sangat tinggi).…”

Section: Uji Laboratoriumunclassified

Analisis Geologi Teknik Longsor di Desa Kuatae, Kecamatan Kota Soe, Nusa Tenggara Timur

Syaeful¹,

Kamajati²,

Rachael³

et al. 2021

EKSPLORIUM

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ABSTRAK Bencana alam longsor di Desa Kuatae, Kecamatan Kota Soe sering terjadi pada musim hujan. Longsor telah menyebabkan rusaknya rumah dan infrastruktur lainnya. Penelitian longsor dilakukan dengan pemetaan geologi teknik, pengeboran geologi teknik, uji laboratorium, analisis kestabilan lereng, dan identifikasi opsi penanggulangan. Berdasarkan hasil pemetaan, longsor terjadi dalam dua model, yaitu blok batugamping terumbu yang mengalami longsor translasi di atas napal dan batulempung serta longsor rotasi pada napal yang dikontrol oleh lapisan dasar yang kontak dengan batulempung. Hasil uji penetrasi standar pada batulempung dan napal menunjukkan nilai konsistensi yang sangat tinggi. Hasil analisis kestabilan lereng menunjukkan lereng dalam keadaan stabil tapi ternyata longsor masih terjadi di beberapa tempat pada area napal dan batulempung. Hal tersebut mengindikasikan bahwa material batuan mengalami degradasi kuat geser pada beberapa kondisi. Penelitian lebih lanjut terkait degradasi material batuan, seperti sifat tahan lekang dan lempung mengembang sangat penting untuk menentukan opsi penanggulangan yang paling tepat dilakukan pada kasus longsor di Desa Kuatae.ABSTRACT Landslides in Kuatae Village, Kota Soe District often occur during the rainy season. The slope failures cause damage to houses and other infrastructures. The research of slope failure has been carried out by using engineering geological mapping, engineering geological drilling, laboratory test, slope stability analysis, and identification of countermeasure options. Based on the mapping results, slope failures occur in two models, the first one was coral limestone blocks translation failure over marl and claystone, and the second one was rotation failure on marl that controlled by the base layer which contact with claystone. The result of the standard penetration test on claystone and marl showed a very high consistency value. The slope stability analysis had shown the slope is in a stable state, but slope failure occurred in several places on the marl and claystone area. Those indicated that the material had encounter shear strength degradation under several circumstances. Further investigation on the degradation of the rock material, such as slake durability and swelling clay are very important to determine the most appropriate countermeasure option to be applied in the landslide case of Kuatae Village.

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The Correlation of Exposure Time and Claystone Properties at the Warukin Formation Indonesia

Cited by 17 publications

References 19 publications

The Influence of Kaolinite - Illite toward mechanical properties of Claystone

The Influence of Kaolinite - Illite toward mechanical properties of Claystone

Simple Slope Stabilization on Quartz Sandstone using Horizontal Drain

Analisis Geologi Teknik Longsor di Desa Kuatae, Kecamatan Kota Soe, Nusa Tenggara Timur

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