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.

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 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 PENGARUH ENERGI PEMADATAN DI LABORATORIUM TERHADAP PARAMETER KOMPAKSI MATERIAL CRUSHED LIMESTONE PADALARANG

2020 ◽  
Vol 16 (1) ◽  
pp. 118-132
Author(s):  
Andrias Suhendra Nugraha
Keyword(s):  
Moisture Content ◽  
Optimum Moisture Content ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Fill Material ◽  
Proctor Test ◽  
Standard Proctor Test ◽  
Crushed Limestone

Pelaksanaan konstruksi timbunan jalan (road embankment) merupakan suatu pekerjaan yang memerlukan kajian geoteknik. Kajian geoteknik dilakukan terhadap material timbunan (fill material) yang akan digunakan pada saat tahapan pemadatan (kompaksi) di lapangan. Evaluasi terhadap hasil suatu proses kompaksi mengacu terhadap parameter kompaksi dari fill material yang telah disyaratkan oleh spesifikasi desain. Parameter kompaksi tersebut  antara lain adalah  kadar air optimum (optimum moisture content, wopt) dan berat isi kering maksimum (maximum dry density, ?dry max). Tujuan studi ini adalah untuk menganalisis dan mengevaluasi pengaruh energi pemadatan di laboratorium terhadap parameter kompaksi material crushed limestone yang berasal dari daerah Padalarang, Jawa Barat. Terdapat 4 (empat) variasi energi pemadatan (E) yang ditinjau  pada studi ini yaitu : 605 kN.m/m3 (energi standard Proctor, E1); 1.4 E1; 2.2 E1 dan 3.0 E1. Keseluruhan uji kompaksi di laboratorium menggunakan mold dan rammer untuk standard Proctor test (ASTM D 698). Hasil studi menunjukkan bahwa peningkatan energi pemadatan untuk kompaksi di laboratorium  sebesar 3 kali energi pemadatan standard Proctor, hanya menghasilkan kenaikan gdry max sebesar 5% dan merubah nilai wopt sebesar 3%. Hal ini menunjukkan bahwa peningkatan energi pemadatan di laboratorium tidak terlalu berpengaruh terhadap nilai gdry max maupun wopt , untuk kondisi crushed limestone  bergradasi buruk (poorly graded) dengan rentang ukuran butir  0.85mm – 4.75mm.

scholarly journals Comparison of Geotechnical Properties of Laterite, Kaolin and Peat

2015 ◽  
Vol 773-774 ◽  
pp. 1438-1442 ◽  
Author(s):  
Siti Aimi Nadia Mohd Yusoff ◽  
I. Bakar ◽  
Devapriya Chitral Wijeyesekera ◽  
Adnan Zainorabidin ◽  
Aziman Madun
Keyword(s):  
Specific Gravity ◽  
Moisture Content ◽  
Initial Moisture Content ◽  
General Information ◽  
Geotechnical Properties ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Proctor Test ◽  
Construction Operation ◽  
Soil Behaviour

This paper compares some geotechnical properties of Kaolin, Laterite and Peat. Laterite was collected from Bukit Banang while Peat sample was collected from Parit Nipah, both locations were in Batu Pahat, Johor. Meanwhile, kaolin that was used in this research was manufactured kaolin. These soil samples were subjected to routine laboratory analysis and resulting data were analyzed statistically using a correlation analysis. A laboratory testing program consists of “Basic properties test” to obtain general information on the materials (e.g Natural moisture content, Atterberg Limit, Specific gravity, grain size analysis, chemical composition and pH) and “Geotechnical properties tests” to measure specific properties that characterize soil behaviour for design and constructability assessments (e.g Standard Proctor Test, Unconfined Compressive Strength and CBR).The results showed that the Natural/initial moisture content for laterite, peat and kaolin is 22.54%, 480.61% and 0.22% respectively. Meanwhile Specific gravity for each soil was in the range 1.50-2.79.It was also found that the pH of all soil is acidic which lay in the range of 3.76-5.95.The UCS for the optimally compacted sample of laterite is 445.77 kPa, kaolin is 199.23 kPa and for peat is 58.70 kPa. This paper summarizes the result of analysis performed on all tests conducted. Based on the results, the geotechnical property of the soil is a highly dependent with the type of soil and therefore, determining the soil characterization and the soil strength should be considered during the planning phase of any earthwork construction operation.

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.

Utilization of Large-Scale Rolling-Wheel Tester to Investigate the Stress Reduction in Pavement Layers Due to the Use of Geosynthetic Materials

2019 ◽  
Vol 2673 (2) ◽  
pp. 445-455
Author(s):  
Jason Wright ◽  
S. Sonny Kim ◽  
Mi G. Chorzepa ◽  
Stephan A. Durham
Keyword(s):  
Moisture Content ◽  
Large Scale ◽  
Pressure Sensors ◽  
Optimum Moisture Content ◽  
Small Scale ◽  
Wheel Load ◽  
Subgrade Soils ◽  
Rolling Wheel ◽  
Aggregate Base ◽  
Pavement Foundation

In a geosynthetic-reinforced pavement system, the load-bearing capacity of subgrade soil is improved by the lateral distribution of vertical stresses at the reinforcing layer. Under small-scale triaxial testing, the tensile properties of the geosynthetic are difficult to measure. Therefore, it is desirable to conduct large-scale testing to accurately monitor the behavior of geosynthetic-reinforced pavement foundations when subjected to rolling-wheel loadings. This study investigates the behavior of geosynthetic-reinforced pavement foundation systems through large-scale rolling-wheel tests performed with problematic subgrade soils found in north Georgia. Sixteen large-scale specimens were constructed of which twelve were reinforced with geosynthetic. Subgrade soils were compacted either at their optimum moisture content or at a higher than optimum moisture content to produce different California Bearing Ratios during specimen preparation. Both an extruded biaxial geogrid and woven geotextile were placed at various locations to investigate the optimal placement locations for different subgrade conditions. Pressure sensors were installed near the bottom of the aggregate base layer and near the top of the subgrade layer to monitor the variations in vertical stress within the pavement system under rolling-wheel load. Further, light weight deflectometer measurements were collected post-test to determine the effect of the geosynthetic on pavement foundation stiffness. The vertical pressure at the bottom of the aggregate base and top of subgrade decreased on average approximately 15.3% and 18.8%, respectively. The results indicate which type of geosynthetic and placement location provides the greatest reduction of pressure for each of the given subgrade conditions.

Factors determining the optimum moisture content (OMC) of greywacke aggregates from northern New Zealand

2019 ◽  
Vol 19 ◽  
pp. 35-43
Author(s):  
Wentao Li ◽  
Douglas J. Wilson ◽  
Tam J. Larkin ◽  
Philippa M. Black
Keyword(s):  
New Zealand ◽  
Moisture Content ◽  
Optimum Moisture Content

Compaction Characteristic of Lime Modified Expansive Soil

2013 ◽  
Vol 710 ◽  
pp. 348-351
Author(s):  
Zheng Rong Zhao ◽  
Lei Wang ◽  
Hong Xia Yang
Keyword(s):  
Moisture Content ◽  
Expansive Soil ◽  
Size Composition ◽  
Optimum Moisture Content ◽  
Dry Density ◽  
Content Increase ◽  
Maximum Dry Density ◽  
Compaction Curve ◽  
Compaction Characteristic ◽  
Two Peaks

Through compaction test discussed about the compaction characteristics of expansive soil by lime modified in middle of Shandong province. The results show that the optimum moisture content is lower when the expansive soil is cured by dry compaction method, and the maximum dry density is higher. Compaction curve appeared the phenomenon of two peaks when expansive soil is cured by wet compaction method.Lime content of lime improved expansive soil, particle size composition, age and compaction function have influence on compaction curve.With the increase of the quantity of lime, the optimum moisture content increases, the maximum dry density decreases. With the age growth, the optimum moisture content increase slightly,the maximum dry density decreases slightly. The bigger the compaction work, the smaller moisture content is, the larger the maximum dry density is.

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