scholarly journals PENGARUH PENGGUNAAN BAHAN SERBUK MARMER PADA STABILISASI TANAH LEMPUNG EKSPANSIF (Kasus Tanah Lempung Ekspansif di Daerah Citra Land Surabaya)

2019 ◽  
Vol 16 (2) ◽  
Author(s):  
Ernawan Setyono ◽  
Sunarto Sunarto ◽  
Anggita Moro Gumilang
Keyword(s):  
Compression Test ◽  
California Bearing Ratio ◽  
Unconfined Compression ◽  
Unconfined Compression Test

Konstruksi jalan diatas tanah dasar yang bersifat ekspansif banyak dijumpai di Indonesia. Jenis tanah ini akan mengembang dan dapat menyebabkan jalan atau struktur terangkat disaat kondisi kadar air tinggi. Sebaliknya disaat kadar airnya rendah, tanah ekspansif akan menyusut dan dapat menyebabkan penurunan jalan (shrinkage). Akibat perubahan muai susut (swelling and shrinkage activity) kontruksi jalan menjadi tidak stabil sehingga untuk jangka waktu yang lama terjadi keretakan memanjang dan bergelombang. Salah satu upaya untuk mendapatkan sifat tanah yang memenuhi syarat teknis tertentu adalah dengan metode stabilisasi tanah menggunakan bahan tambah serbuk marmer dari hasil olahan pabrik marmer di Tulungagung, Jawa Timur. Untuk mengetahui pengaruh penambahan serbuk marmer terhadap kekuatan dan nilai daya dukung tanah dibuktikan dengan pengujian Unconfined Compression Test dan uji California Bearing Ratio. Benda uji dibuat dengan variasi penambahan serbuk marmer sebesar 5%, 10%, 15%, 20%, 25%. Dari pengujian menunjukkan bahwa tanah lempung ekspansif yang distabilisasi dengan serbuk marmer dapat memperbaiki sifat fisik dan mekanik tanah. Pada uji sifat fisik tanah sampel yang diambil termasuk tanah lempung dengan tingkat plastisitas rendah. Sedangkan nilai kuat tekan dan daya dukung tanah meningkat setelah distabilisasi dengan serbuk marmer.

Correlation of UCS and CBR on Lightweight Geocomposite of Soil-EPS Stabilized by Waste of Buton Asphalt

2020 ◽  
Vol 998 ◽  
pp. 311-316
Author(s):  
Ichsan Rauf ◽  
Lawalenna Samang ◽  
Tri Harianto ◽  
Ardy Arsyad
Keyword(s):  
Compressive Strength ◽  
Mechanical Behavior ◽  
Compression Test ◽  
Expanded Polystyrene ◽  
California Bearing Ratio ◽  
Dry Density ◽  
Period Effect ◽  
Unconfined Compression ◽  
Unconfined Compression Test ◽  
Curing Period

The conventional embankment has disadvantages in terms of its weight; it has an implication for the level of deformation that will occur on the subgrade layer. This study was conducted dealing with the design of geocomposite material compositions based on their mechanic characteristics. The lightweight geocomposit material (LWGM) was constructed by composing soil with expanded polystyrene (EPS) with by-product of buton asphalt as the binder agent (WBA). Unconfined Compression Test (UCT) and California Bearing Ratio (CBR) were examined to figure out the mechanical behavior of LWGM. The percentages of WBA used on specimens were 3%, 5%, 7% and 9%, while those of EPS were 0.15% and 0.30%, based on weight of soils dry density. Furthermore, to understand the curing period effect, all the specimens were cured and tested within 7 days and 28 days. The results showed that the LWGM could reduce the embankment densities from 20% to 35%, compared to conventional embankment. The compressive strength and CBR values presented the same tendency, so that, based on correlation of UCS and CBR value, the LWGM compositions that are appropriate for road foundation criteria as subbase courses are 3.2% to 7% for the WBA and 0,15% - 0,30% for the EPS.

scholarly journals An Investigation on the Effect of Calcite Bacteria Seeding on Shear Strength of Peat Soil via an Unconfined Compression Test

2015 ◽  
Vol 773-774 ◽  
pp. 1513-1517
Author(s):  
Norbaya Sidek ◽  
S. Abdul-Talib ◽  
N. Mohd Zain ◽  
N.R.N.A. Rashid ◽  
I.A. Abu Bakar
Keyword(s):  
Shear Strength ◽  
Liquid Medium ◽  
Compression Test ◽  
Peat Soil ◽  
High Water Content ◽  
Unconfined Compression ◽  
Water Control ◽  
Unconfined Compression Test ◽  
Sporosarcina Pasteurii ◽  
Modified Urea

Peat soils have been known for their problematic characteristics which include high water content, high compressibility and low shear strength. In this study, an attempt was made to investigate the effect of 1 week addition of modified Urea-CaCl2liquid medium with and withoutSporosarcina pasteuriion the shear strength of unsterilized dried peat soil using the Unconfined Compression Test. After the treatment period, significant increase in the shear strength of the soil was found to be highest for peat + medium at 42 kN/m2, moderate for peat + medium +Sporosarcina pasteuriiat 27 kN/m2and unchanged for peat + water control at 24 kN/m2. Although the growth dynamics of all the microbes involved in the calcite formation in the treated peat soil were not known, the addition of the modified Urea-CaCl2liquid medium into the soil clearly had contributed to the marked increased in the shear strength of the soil. It is probable that the medium had promoted a better growth of indigenous calcite bacteria population in the soil which may have been suppressed by the slow growingS. pasteuriipopulation being added daily to the soil

Mechanical Analysis of Unconfined Compression Test of Cylinder

2018 ◽  
Vol 2672 (27) ◽  
pp. 37-44
Author(s):  
Jian Xiao ◽  
Zhiming Tan ◽  
Jingliang Chen
Keyword(s):  
Compression Test ◽  
Poisson Ratio ◽  
Current Method ◽  
Vertical Displacement ◽  
Mechanical Analysis ◽  
Outer Side ◽  
Unconfined Compression ◽  
Unconfined Compression Test ◽  
Maximum Tensile Strain ◽  
End Restraint

The unconfined compression test is widely used because of convenient specimen formation, simple experimental process, and low requirement for equipment. In view of the experimental characteristics, the axisymmetric mechanical model of a cylinder with horizontal friction was constructed and its elastic analytic solution was also deduced. The stress and the strain of the cylinder under unconfined compression with different boundary conditions were analyzed by using the analytical solution, and the failure characteristics of the cylinder under unconfined compression were studied and verified by laboratory testing. The results showed that the end restraint effect of the cylinder increased with the decrease of the height-to-diameter ratio and the increase of the Poisson ratio. When the end surface of the cylinder was constrained, the maximum tensile strain appeared in the middle of the cylindrical side; its value increased with the constraint effect, and greater loads were needed to make the same vertical displacement. The compressive strength derived from the current method would be too weak, and the compressive modulus of elasticity would be too great. If the end constraint was large, a small network crack first formed in the middle of the outer side of the cylinder, forming the double-tapered destruction. If the end face was weakly restrained, the cracks descended from the top to the bottom, and the specimens split.

scholarly journals STUDI PERBANDINGAN PENCAMPURAN 4 JENIS LIMBAH YANG SULIT DIDAUR ULANG TERHADAP PENINGKATAN PROPERTI TANAH

2019 ◽  
Vol 2 (3) ◽  
pp. 117
Author(s):  
Stanislaus Stanislaus ◽  
Aniek Prihatiningsih
Keyword(s):  
Fly Ash ◽  
Compression Test ◽  
Unconfined Compression ◽  
Unconfined Compression Test ◽  
Clay Shale

Keadaan tanah memiliki peran penting terhadap keperluan konstruksi dalam bidang teknik sipil, tanah berfungsi untuk menopang suatu bangunan konstruksi di atasnya, namun di beberapa tempat di Indonesia terdapat daerah yang memiliki tanah yang kurang baik seperti memiliki daya dukung rendah, hal ini sangat berpengaruh terhadap proses konstruksi. Selain tanah yang kurang baik limbah juga merupakan faktor permasalahan utama yang terjadi di Indonesia, limbah yang dibuang dan tertumpuk pada satu wilayah tertentu dapat menyebabkan dampak negatif terhadap lingkungan. Untuk menghindari hal tersebut maka dilakukanlah suatu penelitian agar limbah yang tidak dapat didaur ulang tersebut dapat digunakan sebagai bahan stabilisasi tanah, dan diharapkan dapat meningkatkan daya dukung dari tanah itu sendiri.Penelitian ini menggunakan tanah clay shale dari daerah Cietereup Sentul Bogor. Pengujian menggunakan unconfined compression test dengan komposisi variasi limbah yaitu serbuk kaca, abu sekam padi, styrofoam, dan fly ash type F sebesar 10% berdasarkan volume mold unconfined compression test.

scholarly journals About the Uncertainty of Unconfined Compression Test Results on Cement Improved Soil

2014 ◽  
Vol 63 (1) ◽  
pp. 44-48
Author(s):  
Kohei SAWA ◽  
Yoshihisa NAKAYAMA ◽  
Natsuko KUSUMOTO ◽  
Yumi NAKATA
Keyword(s):  
Compression Test ◽  
Test Results ◽  
Unconfined Compression ◽  
Unconfined Compression Test
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