scholarly journals Bearing Capacity of very Expansive Soils at Jatinangor Area, West Java, Indonesia

2018 ◽  
Vol 147 ◽  
pp. 07003
Author(s):  
David Simangunsong ◽  
Satrio Wibowo ◽  
Zufialdi Zakaria
Keyword(s):  
Bearing Capacity ◽  
Correlation Coefficient ◽  
Expansive Soils ◽  
Soil Mechanics ◽  
Expansive Soil ◽  
Soil Physics ◽  
West Java ◽  
Allowable Bearing Capacity ◽  
Shrinkage And Swelling

Expansive soil is a kind of soil that has ability to shrinkage and swelling. According to Ronny (2014) Jatinangor area has expansive soil that is so very influential in the planning of infrastructure construction. This research aimed to measure the bearing capacity of the very expansive soils in Jatinangor area and to determine the correlation between activity number of soil and its bearing capacity. The method used is to collect the soil physics and mechanics data. Based on the soil mechanics data, the research location is divided into three zones of allowable bearing capacity, those are zone with allowable bearing capacity < 4 T/m2, zone with allowable bearing capacity 4-7 T/m2, and zone with allowable bearing capacity > 7 T/m2. The correlation between activity number and bearing capacity of soil follows the equation qa = -1.9505(A) + 6.957 with correlation coefficient is -0.7911.

scholarly journals Effect of Iron Chloride on the Strength Behaviour of the Expansive Clay

2018 ◽  
Vol 9 (1) ◽  
pp. 6730-6733
Keyword(s):  
Calcium Chloride ◽  
Civil Engineering ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Iron Chloride ◽  
Black Cotton Soil ◽  
Expansive Clay ◽  
Expansive Clays ◽  
Shrinkage And Swelling ◽  
Strong Electrolytes

From the fast few decades, several techniques were introduced inorder to modify the behaviour of expansive clays. The use of strong electrolytes like calcium chloride (CaCl2 ), aluminum trichloride (AlCl3 ) and iron chloride (FeCl3 ) were extensively used in various civil engineering applications. Expansive soils possesses alternate shrinkage and swelling with the removal and addition of water from it. Iron chloride was effectively used to alter the swelling and shrinkage and also improve the engineering behaviour of expansive clays. Therefore, in the current work an effort is made for study the influence of iron chloride (FeCl3 ) on the strength behaviour of the expansive soil. The outcomes from the laboratory investigation proved that the usage of iron chloride (FeCl3 ) produce reduction in swelling and improvement in the strength. It was found that 1% FeCl3 be the optimum for both the UCS and CBR. Hence, from the investigation it was showed that iron chloride is a valuable stabilizer to enhance the properties of black cotton soil and to create it apt for various applications of Civil Engineering.

scholarly journals A Framework for Interpreting Lateral Swelling Pressure in Unsaturated Expansive Soils

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Mingyu Li ◽  
Yanqing Wei ◽  
Yunlong Liu ◽  
Junwei Jin
Keyword(s):  
Expansive Soils ◽  
Soil Mechanics ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Field Studies ◽  
Theoretical Framework ◽  
Water Infiltration ◽  
Civil Infrastructure ◽  
Unsaturated Soil Mechanics ◽  
Unsaturated Expansive Soils

Lateral swelling pressure (LSP) develops when expansive soil volume increment associated with water infiltration is restrained in a confined domain, for example, due to construction of civil infrastructure. In this paper, initially a flowchart is developed to highlight various key factors that influence the LSP mobilization according to lab and field studies collected from previous literature studies. Then extending unsaturated soil mechanics, a theoretical framework is proposed for illustrating the LSP mobilization in the field against retaining structures and pile foundations under different boundary conditions, respectively. An example problem for a basement wall and a pile foundation constructed in a typical expansive soil from Regina, Canada, is presented to illustrate the proposed theoretical framework. The framework and corresponding analysis presented in this paper can facilitate to provide rational designs of geotechnical infrastructures in expansive soils.

Effect of the Grain Size of Sand on Expansive Soil

2020 ◽  
Vol 857 ◽  
pp. 367-373
Author(s):  
Yahya K. Atemimi
Keyword(s):  
Expansive Soils ◽  
Soil Mechanics ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Liquid Limit ◽  
Dry Density ◽  
Sieve Analysis ◽  
Maximum Dry Density ◽  
Sand Mixture ◽  
New Phase

The interest in expansive soils goes as far as they were considered as a new phase of soil mechanics. Problems associated with potential volume change of soils occur worldwide, mainly in the arid and semi-arid climatic region, as is the case of the country of this research. These problems are particularly existed in regions where the variation in the moisture content can cause a potential expansiveness of the soil. In fact, Bentonite/Sand mixture represents one of the available answers for the geotechnical engineering problems such as heaves, cracks and other damages caused by swelling and shrinkage. This mixture may be used to 1) reduce the settlement time of structures, and 2) increase the permeability of soils. The main target of the present work is to demonstrate the influence of adding sand on an expansive soil (bentonite) behavior. This includes an investigation to the effect of the amount and the particles size of sand on the physical properties of the expansive soil. The reduction in swelling and swelling pressure of the expansive soil by the addition of different percentages and different particles size of sand and the consequent effect on strength characteristic were also studied. Thirteen samples of Bentonite/sand mixture were used in this study to evaluate the effect of the sand percentages on the swelling behavior. To implement the laboratory program, many tests were used which were sieve analysis, Atterberg’s limits, compaction, and free swelling test with swelling pressure test. The results indicated a reduction in the liquid limit of around 55% and in the plastic limit of around 54%, where the increase in the maximum dry density was 46%. On the other hand, the reduction in the swelling pressure was 87.5%.

scholarly journals Stabilisasi Tanah Ekspansive dengan Menggunakan Tanah Putih untuk Tanah Dasar di Daerah Godong Kabupaten Grobogan Jawa Tengah

2018 ◽  
Vol 24 (1) ◽  
pp. 1 ◽  
Author(s):  
Sri Prabandiyani Retno Wardani ◽  
Muhrozi Muhrozi ◽  
Andi Retno Ari Setiaji ◽  
Danny R Riwu
Keyword(s):  
Mechanical Properties ◽  
Expansive Soils ◽  
Soil Mechanics ◽  
Chemical Constituents ◽  
Expansive Soil ◽  
Physical And Mechanical Properties ◽  
Dry Weight ◽  
Central Java ◽  
Soil Cement ◽  
Engineering Department

Problematic soils such as expansive soils are common in Indonesia. There are several methods to overcome the damage caused by expansive soil, such as by mixing the soil with additives. Some researchers have conducted research by mixing additives into expansive soil (cement, lime, fly ash etc), which work to increase soil strength and reduce swelling. Considering that the people in Buraen Village of Kabupaten Kupang use white soil as a substitute for cement, where the white soil has chemical constituents almost the same as those owned by cement, and contain CaO as it has lime, it is necessary to do research to determine the effect of white soil on physical and mechanical properties of expansive soil, so it can be used as an additive. This research was conducted at Soil Mechanics Laboratory, Civil Engineering Department, Engineering Faculty, Diponegoro University, Semarang.with soil sample from Godong, Central Java and white soil in Buraen Village of Kupang Regency, which purpose to find out the change of physical and mechanical properties of expansive soil that have been given some variation of mixture of white soil  to the dry weight of the soil, with optimum moisture content from standard Proctor test results. The results of this study indicate that white soil can be used as an additive and the use of OMC for mixing is the OMC of expansive soil.

scholarly journals Review on foundation practices for expansive soils, special emphasis on granular anchor pile foundation

2018 ◽  
Vol 7 (2.1) ◽  
pp. 84
Author(s):  
Munnangi RaviTeja ◽  
N R Krishna Murthy
Keyword(s):  
Critical Review ◽  
Pile Foundation ◽  
Expansive Soils ◽  
Low Cost ◽  
Expansive Soil ◽  
Swelling Pressure ◽  
Shrinkage And Swelling ◽  
The Cost

Mostly the lightly loaded structures founded in expansive soils develop cracks owing to alternate shrinkage and swelling as the weight of superstructure cannot counteract the swelling pressure. Hence the cost of foundation to be laid in these soils must be suitable proportions to low cost of structure. This paper presents a critical review on emphasis on granular anchor pile foundation and  other the foundation practices for expansive soil. 

Analysis of the Effect of Cash Turnover on Liquidity at PT. Pekebun Nusantara VIII, Sukabumi Regency, West Java

2020 ◽  
Author(s):  
endang naryono
Keyword(s):  
Linear Regression ◽  
Correlation Coefficient ◽  
Secondary Data ◽  
Positive Influence ◽  
West Java ◽  
Financial Reports ◽  
A Value ◽  
Ex Post ◽  
Ex Post Facto

Research aims to understand gyrations cash pt .Had provided nusantara viii , liquidity to pt .Had provided nusantara viii , and to know the influence of gyrations cash on the level of liquidity to PT .Perkebunan nusantara VIII sukabumi .The methodology used is the method ex-post facto capital .This research using primary and secondary data obtained from financial reports and non financial from pt .Pekebunan nusantara viii sukabumi .To test hypotheses used linear regression and the correlation with on the spss 15.0 for windows. Based on the results of research shows that there is a positive influence between second match of cash and liquidity pt .Had provided nusantara viii sukabumi .A level of closeness ( correlation ) the second variables strong enough , are r = 0,800 with a value of a correlation coefficient r &amp; gt; 0 it means if cash second match of getting up and liquidity will increase , and vice versa . While from the results of the equation above the results linear regression simple as follows: y = 185,137 + 0,045x means value ( a ) or constant of 185,137 who have the meaning that if cash two zero ( 0 ) or not increased so level of 185,137 liquidity .The score regression ( b ) of 0,045 the show the relation in line that every 1 increase point in cash and two rate rose to 185,137 liquidity

Development of allowable bearing capacity for strip foundations in unsaturated soils

2019 ◽  
Vol 114 ◽  
pp. 103138 ◽  
Author(s):  
Changguang Zhang ◽  
Benxian Gao ◽  
Qing Yan ◽  
Junhai Zhao ◽  
Lizhou Wu
Keyword(s):  
Bearing Capacity ◽  
Unsaturated Soils ◽  
Allowable Bearing Capacity

scholarly journals The Use of Geogrids in Mitigating Pavement Defects on Roads Built over Expansive Soils

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Richard Shumbusho ◽  
Gurmel S. Ghataora ◽  
Michael P.N. Burrow ◽  
Digne R. Rwabuhungu
Keyword(s):  
Seasonal Changes ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Real Field ◽  
Experimental Program ◽  
Swelling Potential ◽  
Swelling Behaviour ◽  
Wetting And Drying ◽  
Potential Benefits

This study was conducted to investigate the potential benefits of using geogrids in mitigating pavement defects notably roughness and longitudinal cracking on pavements built over expansive soils. The seasonal changes of expansive soils (periodic wetting and drying) cause detrimental effects on the overlying road pavements. Such detrimental behavior of expansive soils was simulated in a controlled laboratory environment through allowing cyclic wetting and drying of an expansive soil underlying a pavement section. The shrink/swell effects of the expansive soil subgrade were examined through monitoring its change in moisture, and measuring deformation of overlying pavement section. The experimental study suggested that a geogrid layer in a reinforced pavement section can reduce surface differential shrinking and swelling deformation resulting from underlying expansive soils by a factor of 2 and 3 respectively in comparison to unreinforced section. Given that an oedometer test which is typically used to predict swelling potential of expansive soils is known to overpredict in-situ soil swell, experimental program also investigated quantitatively the extent to which the oedometer can overestimate swelling behaviour of the real-field scenarios. It was found that oedometer percent swell can overpredict in-situ swelling behaviour of the expansive soil by a factor ranging between 2 and 10 depending upon the period over which the in-situ expansive soil has been in contact with water.

scholarly journals STABILISASI TANAH EKSPANSIF MENGGUNAKAN KAPUR DAN SPENT CATALYST UNTUK TANAH DASAR PERKERASAN

2019 ◽  
Vol 19 (1) ◽  
pp. 21-30
Author(s):  
Arifudin Nur ◽  
Suryo Hapsoro Tri Utomo ◽  
M. Zudhy Irawan
Keyword(s):  
Soil Stabilization ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Petroleum Processing ◽  
Spent Catalyst ◽  
Maximum Increase ◽  
Lime Content ◽  
Road Pavement ◽  
Pozzolanic Material ◽  
Spent Catalysts

Abstract Expansive soils have high swelling and shrinkage potentials, which may cause damage to road structures. Therefore, stabilization is required. One method of stabilization is to use lime and spent catalysts with the aim of increasing carrying capacity and reducing swelling. Spent catalyst is a petroleum processing waste and classified as pozzolanic material. The addition of lime and spent catalysts can increase the CBR value and reduce swelling of soils. The results of this study indicate that the maximum increase in soaked CBR and unsoaked CBR values occurred in soil mixtures with optimum lime content and 12% spent catalyst with 7 days of curing. While the soil mixture with optimum lime content and 12% spent catalyst, with 7 days of curing, is the best mixture that produces soaked CBR value of 49.67%, swelling of 0.15%, and plasticity index value of 11.97%, so the soil meets the requirements to be used as pavement subgrade. Keywords: expansive soil, stabilization, road structure, subgrade, road pavement  Abstrak Tanah ekspansif memiliki potensi pengembangan dan penyusutan yang tinggi, sehingga dapat menyebabkan kerusakan struktur jalan. Oleh sebab itu, perlu dilakukan stabilisasi. Salah satu metode stabilisasi adalah menggunakan kapur dan spent catalyst dengan tujuan meningkatkan kapasitas dukung dan menurunkan swelling. Spent catalyst merupakan limbah pengolahan minyak bumi dan termasuk bahan pozzolan. Penam-bahan kapur dan spent catalyst mampu meningkatkan nilai CBR dan mereduksi swelling. Hasil studi ini menunjukkan bahwa peningkatan maksimum nilai CBR soaked maupun CBR unsoaked terjadi pada campuran tanah dengan kadar kapur optimum dan 12% spent catalyst dengan peraman 7 hari. Sedangkan campuran tanah dengan kadar kapur optimum dan 12% spent catalyst, dengan peraman 7 hari, merupakan campuran terbaik yang menghasilkan nilai CBR soaked sebesar 49,67%, swelling sebesar 0,15%, dan nilai indeks plastisitas sebesar 11,97%, sehingga tanah memenuhi syarat untuk digunakan sebagai tanah dasar perkerasan jalan. Kata-kata kunci: tanah ekspansif, stabilisasi, struktur jalan, tanah dasar, perkerasan jalan

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