Estimation of Subgrade Resilient Modulus for Fine-Grained Soil from Unconfined Compression Test

2015 ◽  
Vol 2473 (1) ◽  
pp. 126-135 ◽  
Author(s):  
M. Shabbir Hossain ◽  
Wan Soo Kim
Keyword(s):  
Compression Test ◽  
Resilient Modulus ◽  
Unconfined Compression ◽  
Unconfined Compression Test ◽  
Fine Grained ◽  
Fine Grained Soil

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

scholarly journals Ultrasonic Pulse Velocities And Dynamic Elastic Constants Of Sandstones From The Semanggol Formation, Beris Dam, Kedah Darul Aman

Warta Geologi ◽  
2021 ◽  
Vol 47 (1) ◽  
pp. 1-8
Author(s):  
John K. Raj
Keyword(s):  
Grain Size ◽  
Elastic Constants ◽  
Ultrasonic Pulse ◽  
Coarse Grained ◽  
Unconfined Compression ◽  
Ultrasonic Velocities ◽  
Unconfined Compression Test ◽  
Fine Grained ◽  
Wave Velocities ◽  
Shear Wave Velocities

The main Beris Dam is founded on a sequence of thick bedded conglomerates and pebbly to fine grained sandstones with minor mudstone mapped as the Semanggol Formation of Triassic age. Ultrasonic pulse measurements show velocities of compressional and shear waves through the sandstones to increase with decreasing grain size; the pebbly sandstone with velocities of 2.210, and 5.171, km/s, and the coarse grained sandstone with velocities of 2.477, and 5.612, km/s, respectively. The medium grained sandstones have compressional and shear wave velocities of 2.457, and 5.793, km/s and the fine grained sandstones, velocities of 2.572, and 5.867 km/s, respectively. Dynamic elastic constants computed from the ultrasonic velocities also increase in values with decreasing grain size; Poisson’s ratio varying from 0.36 to 0.39, the modulus of elasticity from 35.076 to 48.210 GPa, the bulk modulus from 52.260 to 67.362 GPa and the modulus of rigidity from 12.637 to 17.468 GPa. Increasing velocities and elastic constants with decreasing grain size are considered to result from a denser arrangement of constituent grains as shown by increasing dry unit weights. Comparison with the results of an unconfined compression test on a fine grained sandstone indicate that the ultrasonic elastic constants are good approximations of static elastic constants.

scholarly journals Pengaruh Penambahan Abu Cangkang Kelapa Sawit Pada Tanah Lempung Paccinongang Kabupaten Gowa

2021 ◽  
Vol 3 (2) ◽  
pp. 202-211
Author(s):  
Leonard Felix Widyo Sanderan ◽  
Irwan Lie Keng Wong ◽  
Monika Datu Mirring Palinggi
Keyword(s):  
Physical Properties ◽  
Compression Test ◽  
Oil Palm ◽  
Clay Soil ◽  
Soil Layer ◽  
Unconfined Compression ◽  
Free Press ◽  
Unconfined Compression Test ◽  
Palm Shell ◽  
Oil Palm Shell

Soil has an important role in a highway construction planning that serves to pass the load from the top layer, but not always the basic soil layer is able to function properly. Therefore, in this study was conducted to find out the effect of the addition of oil palm shell ash on clay soil to UCT (Unconfined Compression Test). The type of soil that will be usedfor penelitian is clay soil taken in Paccinongang area, Gowa Regency. The methodology in this study conducted several    soil physical properties testing then Kompaksi testing to obtain optimum moisture content value, and Unconfined Compression Test to get strong press value (qu). The results of the study showed that the soil meets the physical properties of clay soil. From The Free Press Strong test on the ash content of the palm shell 0%, 3%, 6%, 9%, 12% and 15% at point 1 the free press strength value decreased from 0% by 0.362% and increased at 9% by 0.424%. Meanwhile, at point 2, it decreased by 0% by 0.445% and increased at 12% by 0.423%.  From the Unconfined Compression Test on Paccinongang clay, Gowa Regency with the addition of oil palm shell ash from both samples, there was an increase in the addition of 9% and 12% of normal clay soil.

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