scholarly journals Improving the Shear Strength of the Soil by using Jute Fabric

2019 ◽  
Vol 8 (4) ◽  
pp. 6627-6630
Keyword(s):  
Shear Strength ◽  
Moisture Content ◽  
Bearing Capacity ◽  
Soil Sample ◽  
Liquid Limit ◽  
Optimum Moisture Content ◽  
Sieve Analysis ◽  
Shear Strength Test ◽  
Jute Fabric ◽  
Proctor Test

Bearing capacity of the soil is based on the shear strength of the soil. By improving the shear strength, bearing capacity of soil increases. Various additives such as lime, fly ash, cement, bitumen, tar etc. and easily available on-site materials such as sands, mining waste, natural stone waste etc were using to improve the shear strength of the soil. The main aim of this project is to improve the shear strength of the soil by adding jute fabric in various proportions. Jute fabric is mainly produced from a plant species called Corchorus olitorius. Soil samples were collected from Mangalapuram, Trivandrum and the identification tests such as specific gravity, liquid limit, plastic limit and sieve analysis of soil were done based on IS2720 recommended procedures. As per IS1498 – 1970 the soil is classified as poorly graded sands (SP). Jute fabric is added to the soil on 3%, 6% and 9% of weight of soil sample. Standard proctor test is conducted as per IS 2720 (part VII) to determine the optimum moisture content value (OMC). Optimum moisture content value of the soil sample is 10%. The shear strength of the soil is determined by direct shear strength test, which is conducted on both treated and untreated soil sample. From the result it is concluded that by adding 6% of jute fabric the shear strength of the soil reaches its maximum value, further addition of jute fabric reduces the shear strength of soil. Hence it is recommended to use 6% of jute fabric in sub-grade soils for pavements to improve the shear strength.

scholarly journals Influence of wood-derived biochar on the compactibility and strength of silt loam soil

2017 ◽  
Vol 31 (2) ◽  
pp. 149-155 ◽  
Author(s):  
Ahmed Ahmed ◽  
Yvan Gariepy ◽  
Vijaya Raghavan
Keyword(s):  
Shear Strength ◽  
Moisture Content ◽  
Bulk Density ◽  
Penetration Resistance ◽  
Liquid Limit ◽  
Optimum Moisture Content ◽  
Silt Loam ◽  
Plastic Limit ◽  
Density Maximum ◽  
Loam Soil

Abstract Biochar is proven to enhance soil fertility and increase crop productivity. Given that the influence of biochar on soil compaction remains unclear, selected physico-mechanical properties of soil amended with wood-derived biochar were assessed. For unamended silt loam, the bulk density, maximum bulk density, optimum moisture content, plastic limit, liquid limit, and plasticity index were 1.05 Mg m-3, 1.69 Mg m-3, 16.55, 17.1, 29.3, and 12.2%, respectively. The penetration resistance and shear strength of the unamended silt loam compacted in the standard compaction Proctor mold and at its optimum moisture content were 1800 kPa and 850 kPa, respectively. Results from amending the silt loam with 10% particle size ranges (0.5-212 μm) led to relative decreases of 18.1, 17.75, 66.66, and 97.4% in bulk density, maximum bulk density, penetration resistance, and shear strength, respectively; a 26.8% relative increase in optimum moisture content; along with absolute increases in plastic limit, liquid limit, and plasticity index of 5.3, 13.7, and 8.4%, respectively. While the biochar-amended silt loam soil was more susceptible to compaction, however, soil mechanical impedance enhanced.

scholarly journals Effect of Sand Percentage on the Compaction Properties and Undrained Shear Strength of Low Plasticity Clay

2021 ◽  
Vol 9 (1) ◽  
pp. 16-20
Author(s):  
Iyad Alkroosh ◽  
Ali Al-Robay ◽  
Prabir Sarker ◽  
Saif Alzabeebee
Keyword(s):  
Shear Strength ◽  
Moisture Content ◽  
Undrained Shear Strength ◽  
Optimum Moisture Content ◽  
Dry Density ◽  
Sand Content ◽  
Compression Tests ◽  
Maximum Dry Density ◽  
Sand Mixture ◽  
Undrained Shear

This paper investigates the influence of sand content on the mechanical behavior of a low plasticity clay that collected from south of Iraq (Sumer town). Samples have been prepared with sand contents of 0%, 10%, 20%, 30%, and 40% of the clay weight. Standard Proctor and unconfined compression tests have been carried out and the optimum moisture content, maximum dry density, and undrained shear strength have been determined. The results show a gradual increasing trend of the maximum dry density with the increase of the sand content up to 30%. The highest dry density reaches 1.90 g/cm3 corresponding to an optimum moisture content of 12%. In addition, this paper shows that the undrained shear strength is inversely proportional to the increase of the percentage of sand. The results of this work provide a useful addition to the literature regarding the behaviour or low plasticity clay-sand mixture.

scholarly journals Prediction of Shear Strength of Soil Using Direct Shear Test and Support Vector Machine Model

2020 ◽  
Vol 14 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Hai-Bang Ly ◽  
Binh Thai Pham
Keyword(s):  
Support Vector Machine ◽  
Shear Strength ◽  
Moisture Content ◽  
Mean Squared Error ◽  
Learning Algorithm ◽  
Liquid Limit ◽  
Support Vector ◽  
Plastic Limit ◽  
Svm Model ◽  
Soil Shear Strength

Background: Shear strength of soil, the magnitude of shear stress that a soil can maintain, is an important factor in geotechnical engineering. Objective: The main objective of this study is dedicated to the development of a machine learning algorithm, namely Support Vector Machine (SVM) to predict the shear strength of soil based on 6 input variables such as clay content, moisture content, specific gravity, void ratio, liquid limit and plastic limit. Methods: An important number of experimental measurements, including more than 500 samples was gathered from the Long Phu 1 power plant project’s technical reports. The accuracy of the proposed SVM was evaluated using statistical indicators such as the coefficient of correlation (R), Root Mean Squared Error (RMSE), Mean Absolute Error (MAE) over a number of 200 simulations taking into account the random sampling effect. Finally, the most accurate SVM model was used to interpret the prediction results due to Partial Dependence Plots (PDP). Results: Validation results showed that SVM model performed well for prediction of soil shear strength (R = 0.9 to 0.95), and the moisture content, liquid limit and plastic limit were found as the three most affecting features to the prediction of soil shear strength. Conclusion: This study might help in quick and accurate prediction of soil shear strength for practical purposes in civil engineering.

scholarly journals Pengaruh Penggunaan Pasir Putih Sebagai Bahan Tambah Untuk Stabilisasi Tanah Desa Bangkuang Kabupaten Barito Selatan

2019 ◽  
Vol 3 (2) ◽  
pp. 1-7
Author(s):  
Syahdi Syahdi ◽  
Muhammad Suhaimi
Keyword(s):  
Moisture Content ◽  
Soil Properties ◽  
Liquid Limit ◽  
Optimum Moisture Content ◽  
Plasticity Index ◽  
Dry Density ◽  
Maximum Dry Density ◽  
White Sand ◽  
Research Activities ◽  
The Many

Tanah merupakan salah satu dari sekian banyak material yang bervariasi (heterogen) antara satu lokasi dengan lokasi yang lain., maka dalam penelitian ini melakukan penambahan material pasir putih yang kemudian dicampurkan dengan tanah asli yang berasal dari desa Bangkuang Kecapamatan Karau Kuala Kabupaten Barito selatan. Kegiatan penelitian dilakukan di laboratorium Geoteknik dan Transportasi Politeknik Negeri Banjarmasin meliputi beberapa metode pungujian dilakukan sesuai dengan standar penelitian yaitu: SNI 03-1965-2008, SNI 03-1964-2008, SNI 03-1967-2008, SNI 03-1965-2008,SNI 03-1743-2008 SNI 03-1738-2011, dan SNI 2828:2011.  Hasil penelitian, dengan penambahan pasir putih sangat berpengaruh terhadap perbaikan sifat – sifat tanah yang akan digunakan untuk bahan stabilisasi subgredre,   maka didapat nilai sifat-sifat tanah diberi bahan pasir putih (0%) meliputi; kadar air (W) 23,87%, berat jenis (Gs) 2,59, batas cair (LL) 33,9%, batas plastis (PL) 20,11%, plastisitas indeks (PI) 13,79%, kadar air optimum (OMC) 18,6%, kepadatan kering maksimum (dMax) 1,61 Gr/Cm3 dan CBR desain 5%. Nilai sifat-sifat tanah diberi bahan tambah pasir putih. Nilai sifat-sifat tanah diberi bahan tambah pasir putih (15%) meliputi; berat jenis gabungan (Gs) 2,62, batas cair (LL) 29,6%, batas plastis (PL) 19,52%, plastisitas indeks (PI) 10,08%, kadar air optimum (Omc) 81,5%, kepadatan kering maksimum (dMax)) 1,54 Gr/Cm3 dan CBR desain 6,1%, berat isi kering (d) 1,538 gr/cm³. Abstract Land is one of the many varied material (heterogeneous) between one site and another location., then in this research performs addition material of white sand is then blended with the native soil that comes from the village of Karau Kuala Kecapamatan District Bangkuang Barito South. Research activities carried out in the laboratory of Geotechnical and transportation State Polytechnic Banjarmasin includes several methods of pungujian conducted in accordance with the standards of research, namely: in accordance with the SNI 03-1965-2008, SNI 03-1964-2008, SNI 03-1967-2008, SNI 03-1965-2008, SNI 03-1743-2008, SNI 03-1738-2011, and SNI 2828:2011. Results of the study, with the addition of white sand is very influential towards the improvement of the nature – nature of the land to be used for subgredre stabilization materials, then obtained the value soil properties are given materials white sand (0%) include; moisture content (W) 23.87%, heavy types (Gs) 2.59, liquid limit (LL) 33.9%, limits plastis (PL) 20.11%, plasticity index (PI) 13.79%, optimum moisture content (OMC) 18.6%, maximum dry density (/dMax) 1.61 Gr/Cm3 and CBR design 5%. The value soil properties are given the added ingredient of white sand. The value soil properties are given the added ingredient of white sand (15%) include; the weight of the combined type (Gs) 2.62, liquid limit (LL) 29.6%, limits plastis (PL) 19.52%, plasticity index (PI) 10.08%, optimum moisture content (Omc) 81.5%, maximum dry density (/dMax)) 1.54 Gr/Cm3 and CBR design 6.1%, weight dry (/d) 1.538 gr/cm ³.

scholarly journals Influence of admixture of Bamboo leaf ash and lime on the Compaction characteristics of lateritic soil

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
I. O Ameen
Keyword(s):  
Moisture Content ◽  
Soil Sample ◽  
Optimum Moisture Content ◽  
Lateritic Soil ◽  
Dry Density ◽  
Maximum Dry Density ◽  
British Standard ◽  
Bamboo Leaf Ash ◽  
The Impact ◽  
Sample Maximum

This study investigated the impact of compactive efforts on A-7-5 lateritic soil stabilized with Bamboo Leaf Ash (BLA) mixed with lime. Preliminary tests were conducted on the soil sample for identification and classification. Compaction tests (using British Standard Light (BSL), British Standard Heavy (BSH) and West Africa Standard (WAS) compactive efforts) were performed on the sample in both natural and stabilized states by incorporating 2, 4, 6 and 8% Bamboo Leaf Ash mixed together with 1, 2, and 3% lime by weight of soil sample. Maximum dry density (MDD) increased to 1766 kg/m3 at 3% lime and 6% BLA, 1818 kg/m3 at 3% lime and 8% BLA and 1866 kg/m3 at 3% lime and 2% BLA while the optimum moisture content decreased to 12.70% at 3% and lime 8% BLA, 11.40% at 2% lime 6% BLA and 11.12% at 3% lime and 2% BLA for BSL, WAS and BSH, respectively. Based on these findings, the addition of lime-BLA enhanced the soil and has a promising prospect for stabilization of lateritic soil.

Effect of sand percentage on the compaction properties and undrained shear strength of low plasticity soft clay

2021 ◽  
Author(s):  
Iyad Alkroosh ◽  
◽  
Ali Al-Robay ◽  
Prabir Sarker ◽  
Saif Alzabeebee ◽  
...  
Keyword(s):  
Shear Strength ◽  
Moisture Content ◽  
Soft Clay ◽  
Undrained Shear Strength ◽  
Optimum Moisture Content ◽  
Dry Density ◽  
Sand Content ◽  
Compression Tests ◽  
Maximum Dry Density ◽  
Undrained Shear

This study investigated the influence of sand content on the mechanical behaviour of a low plasticity clay found in Iraq. Samples were prepared with sand contents of 0%, 10%, 20%, 30%, and 40% of the weight of the clay. Standard Proctor and unconfined compression tests were carried out and the optimum moisture content, maximum dry density, and undrained shear strength were determined. The results showed a gradual increasing trend of the maximum dry density with the increase of the sand content up to 30%. The highest dry density reached was 1.90 gm/cm3 corresponding to an optimum moisture content of 12%. In addition, it was also found that the undrained shear strength was inversely proportional to the increase of the percentage of sand. Thus, the dry density of the clay could be increased well above 1.70 g/cm3, which is the minimum dry density accepted as a compacted subgrade according to the Iraqi General Specifications for Roads and Bridges (2003); hence, the rejected low plasticity clay could be utilised by mixing with sand. The reasons for the increase of the dry density and the decrease of the undrained shear strength has been extensively discussed in the paper.

Static Compaction of Soils with Varying Clay Content

2015 ◽  
Vol 668 ◽  
pp. 238-246 ◽  
Author(s):  
Alexandr Zhemchuzhnikov ◽  
Khosrow Ghavami ◽  
Michéle dal Toé Casagrande
Keyword(s):  
Moisture Content ◽  
Water Content ◽  
Clay Content ◽  
Optimum Moisture Content ◽  
Testing Procedures ◽  
Compressed Earth Blocks ◽  
Proctor Test ◽  
Earth Blocks ◽  
Standard Proctor Test ◽  
Static Compaction

The use of compressed earth blocks (CEBs) is widespread in the field of earth construction. They present better mechanical performance than adobe and the equipment for their production is simple. Laboratory testing of compressed earth blocks requires large amounts of material. There are variations of unconfined strength testing procedures such as testing halves of the blocks with layers of mortar between them or testing whole blocks in diverse directions. This complicates the interpretation of test results as the shape factor and mortar characteristics influence the results significantly. Static compaction test can be used to produce cylindrical samples representative of CEBs. The water content of soil used for the production of CEBs is often determined in standard Proctor test while experimental data indicate that the optimum moisture content for static and dynamic compaction is different. The present article addresses the behavior of four soil mixes with varying clay content compacted statically with a constant rate of strain. Static compaction curves were compared with those obtained in standard Proctor test. For all the soil mixes the static optimum moisture content was found to correspond to the start of consolidation. The compaction curve presented no wet side of optimum in contrast to Proctor test. The energy needed to achieve a desired density by static compaction was analyzed for soils with varying clay contents. Static compaction was found to be more efficient than dynamic for clayey soils. An increase in water content was observed to help achieving higher densities at low pressures, which can improve the performance of manual CEB presses.

scholarly journals Influence of moisture content of cohesive soils on their shear strength

2017 ◽  
Vol 2017 (5) ◽  
pp. 10-19 ◽  
Author(s):  
Tymoteusz Zydroń ◽  
Małgorzata Wojciechowska-Dymańska ◽  
Andrzej Gruchot ◽  
Tomasz Zalewski
Keyword(s):  
Shear Strength ◽  
Moisture Content ◽  
Optimum Moisture Content ◽  
Cohesive Soils ◽  
Test Results ◽  
Angle Of Internal Friction ◽  
Shearing Rate ◽  
Strength Tests ◽  
Shear Box ◽  
Direct Shear Apparatus

Influence of moisture content of two cohesive soils on their shear strength was the purpose of the tests. The shear strength tests were carried out in a standard direct shear apparatus of dimensions of the box 6 x 6 x 1,8 cm. Each sample of assumed moisture content was preliminary compacted at Proctor apparatus, then was cut using a square cutter and to set into the shear box. Each series of samples were tested at four values of moisture content: equal, lower and higher than optimum moisture content. One series of samples, sheared at moisture content higher than optimum moisture content, the shearbox during consolidation and shearing was filled with the water to the level corresponding to shearing plane. Main tests were done using shearing rate equal to 1,0 mm.min-1 and time of consolidation was equal to 12 hours. Additional tests were done using shearing rate equal to 0,05 mm.min-1 and the samples during consolidation and shearing were saturated. Test results revealed that the most beneficial values of shear strength were obtained at optimum moisture content or lower that optimum moisture content. It stated that the increase of moisture content cause decrease of angle of internal friction and the highest values of cohesion was obtained at optimum moisture content. Comparison of test results obtained for series of samples sheared at optimum moisture content revealed that saturation of soil sample and low shearing rate cause very significant reduction of obtained values of cohesion.

scholarly journals ANALISIS PENGARUH PENAMBAHAN BAHAN STABILISATOR ABU JERAMI TERHADAP KEPADATAN TANAH LEMPUNG EKSPANSIF KABUPATEN PAMEKASAN

KURVATEK ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 45-50
Author(s):  
Laily endah fatmawati ◽  
Herry Widhiarto ◽  
Heri Santoso
Keyword(s):  
Moisture Content ◽  
Optimum Moisture Content ◽  
Proctor Test

Tanah lempung ekspansif merupakan tanah yang memiliki daya dukung rendah dan kembang susut yang tinggi. secara alamiah tanah memiliki sifat-sifat fisis dan mekanis tertentu yang terbatas. Oleh karena itu diperlukan suatu stabilisasi agar nilai parameter tanah menjadi lebih baik sehingga dapat digunakan sebagai tanah dasar dalam suatu konstruksi. Pengujian yang dilakukan meliputi pengujian berat jenis, batas cair, batas plastis, dan pengujian pemadatan dengan proctor test. Tanah yang digunakan dalam penelitian ini diambil dari kawasan Pamekasan Daerah Bujur Timur. Tanah tersebut termasuk kelompok CH dengan indeks plastisitas sebesar 43,5%. Prosentase penambahan Abu Jerami padi yaitu 0%, 2%, 4%, 6%, 8%, 10% terhadap berat kering tanah. Hasil pengujian proctor test paling optimum adalah penambahan abu jerami sebesar 5,8% dengan nilai OMC (Optimum Moisture Content) 15,20 % dan berat isi kering (ɤd) 1,72gr/cm³. Hasil pengujian penggunaan abu jerami yang paling optimum adalah prosentase 7,8% dengan nilai CBR 5,4% sehingga dapat digunakan sebagai alternative perbaikan tanah.   Kata kunci : tanah lempung ekspansif, abu jerami padi, stabilisasi tanah, pamekasan.

scholarly journals Model Tests of Soil Reinforcement Inside the Bucket Foundation with Vacuum Electroosmosis Method

2019 ◽  
Vol 9 (18) ◽  
pp. 3778 ◽  
Author(s):  
Hanbo Zhai ◽  
Hongyan Ding ◽  
Puyang Zhang ◽  
Conghuan Le
Keyword(s):  
Shear Strength ◽  
Moisture Content ◽  
Bearing Capacity ◽  
Soil Moisture Content ◽  
Soil Reinforcement ◽  
Vacuum Preloading ◽  
Bucket Foundation ◽  
Capacity Model ◽  
Vertical Bearing ◽  
Vertical Bearing Capacity

Offshore wind turbine foundations are commonly subjected to large horizontal, vertical, and bending moment loads. Marine soils have high moisture content, high compressibility, high sensitivity, and low strength, resulting in insufficient foundation bearing capacity. In order to improve the bearing capacity of wind turbine foundations and reduce foundation settlement, an internal vacuum preloading method combined with electroosmosis reinforcement is used to reinforce the soil within bucket foundations. The pore water pressure, vertical settlement, pumping quality of the soil during the reinforcement process, soil moisture content before and after the reinforcement, and undrained shear strength were analyzed. Horizontal and vertical bearing capacity model tests were carried out on the reinforced and nonreinforced soil inside the bucket foundation. Results show that vacuum preloading combined with electroosmosis reinforcement reduces soil moisture content inside the bucket foundation by approximately 20%, and the undrained shear strength of the internal soil increases by approximately 20 times. Soil reinforcement has high spatial uniformity. Results of the bucket foundation bearing capacity model show that when the soil inside the bucket foundation is strengthened, horizontal bearing capacity increased by 2.9 times and vertical bearing capacity increased by 2.1 times. Vacuum preloading combined with electroosmosis reinforcement can effectively improve the shear strength of soft soil and enhance the bearing capacity and stability of bucket foundations.

Sign in / Sign up

Export Citation Format

Share Document