scholarly journals PENGARUH FELDSPAR DAN AMPAS TEBU TERHADAP PROPERTIS TANAH EKSPANSIF

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Selvia Agustina ◽  
Lisa Fitriyana
Keyword(s):  
Liquid Limit ◽  
Direct Shear ◽  
Atterberg Limit

<p>Salah satu upaya perbaikan tanah ekspansif adalah dengan stabilisasi, yaitu mencampurkan tanah dengan semen. Namun penggunaan semen memerlukan biaya besar. Oleh sebab itu, perlu pengganti semen. Pada penelitian ini, semen diganti dengan feldspar dan ampas tebu. Tujuannya adalah mengetahui pengaruh karakteristik tanah ekspansif setelah dicampur dengan feldspar dan ampas tebu, serta mengetahui campuran yang lebih baik dalam stabilisasi tanah ekspansif.</p><p>Penelitian ini menggunakan feldspar dan ampas tebu dengan kadar campuran 5%, 10%, dan 15%. Propertis tanah ekspansif yang dimodifikasi ditinjau dari pengujian <em>atterberg limit</em> dan <em>direct shear</em>. Hasil dari pengujian tersebut berupa indeks plastisitas (PI), <em>liquid limit</em> (LL), <em>shrinkage limit</em> (SL), kohesi (c), dan sudut geser dalam (j) dari campuran tanah.</p><p>Hasil menunjukan bahwa karakteristik tanah ekspansif yang dicampur dengan feldspar dan ampas tebu mengalami penurunan indeks plastisitas (PI) dan kohesi (c) sedangkan sudut geser dalamnya (j) semakin tinggi. Campuran yang paling baik adalah menggunakan feldspar dengan kadar 15%.</p>

STABILISASI TANAH EKSPANSIF DENGAN BAHAN TAMBAH GIPSUM (STUDI KASUS DI KAWASAN INDUSTRI CANDI BLOK K-18, SEMARANG)

G - SMART ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 33
Author(s):  
Ibnu Widiantoro ◽  
Fauzi Ahmad
Keyword(s):  
Direct Shear ◽  
Index Properties ◽  
Atterberg Limit

Jenis tanah yang cukup banyak ditemui di Kota Semarang adalah tanah ekspansif. Tanahekspansif adalah tanah lempung yang memiliki karakteristik kembang susut yang cukup besarserta tingkat plastisitas yang tinggi. Permasalahan bangunan yang berdiri di atas tanahekspansif salah satunya terdapat di Kawasan Industri Candi yang berada di Jalan GatotSubroto Semarang pada lokasi Blok K-25. Permasalahan yang terjadi terletak pada tembokyang pecah dan retak retak serta lantai yang bergelombang. Salah satu upaya yang akandilakukan oleh penulis untuk meningkatkan kestabilan tanah ekspansif adalah melakukanpenelitian terhadap penambahan bahan tambah gipsum dengan persentase penambahan yangberbeda. Dalam penelitian ini digunakan penambahan gipsum dengan persentase gipsumsebanyak 0%, 15%, 20% dan 25% dari berat tanah kering. Uji yang dilakukan di laboratoriummeliputi uji mineral tanah, index properties, atterberg limit, uji saringan, uji hidrometer, ujikompaksi, uji swelling dan direct shear. Berdasarkan uji yang telah dilakukan denganpenambahan gipsum, dapat disimpulkan bahwa gipsum memiliki pengaruh yang cukup baikdalam meningkatkan stabilisasi tanah lempung ekspansif.

scholarly journals STABILITAS STRUKTUR TANAH JENIS EKSPANSIF MENGGUNAKAN KOMBINASI ABU DAUN

UKaRsT ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 13
Author(s):  
Rekso Ajiono ◽  
Herlan Pratikto
Keyword(s):  
Water Content ◽  
Liquid Limit ◽  
Plastic Limit ◽  
Atterberg Limit

Dalam bidang konstruksi Tanah adalah suatu media pijakan inti dari sebuah bangunan. Struktur Tanah yang sebagian banyak terdapat lempung didalam komponennya adalah bersifat Monmorillonite. Tingkat stabilitas tanah yang bersifat Montmorillonite terbilang kurang bagus terhadap daya topang infrastruktur bangunan. Cara stabilitas tanah pada penelitian berikut adalah dengan menggunakan abu daun pada variasi penambahan 5%, 10%, 15% dan 20% dengan melakukan pengujian Water Content dan uji gradasi pada struktur tanah asli yang digunakan sebagai sampel penelitian, Uji tanah sampel diambil dari area perumahan wilis indah kota Kediri yang bersifat Montmorillonite. Pada test uji stabilitas tanah adalah dengan menggunakan benda uji mix tanah montmorillonite dengan abu daun dengan melakukan uji Berat Isi, Batas konsistensi (Atterberg Limit) dan Pemadatan Tanah (Proctor). Pada hasil penelitian struktur tanah asli dikategorikan momoroillonite dan setelah ditambah ampas kopi pada penambahan divariasi maksimal sebesar 20%, nilai Liquid Limit naik menjadi 43% dan nilai Plastic Limit mengalami kenaikan menjadi 31,64%, sehingga index plastic dapat mengalami peningkatan menjadi 11,36%. Saat uji pemadatan dengan kondisi benda uji padat sempurna, berat volume kering tanah asli sebesar 6,72 gr/cm3 dan setelah ditambahkan abu daun sebesar 20% mengalami peningkatan berat volume kering menjadi 10,56 gr/cm3.Kata Kunci: Tanah, Abu daun, Stabilitas Tanah

Study on Libyan Silt Property and Suggestions on its Application in Subgrade Construction

2014 ◽  
Vol 587-589 ◽  
pp. 1305-1310
Author(s):  
Ze Yu Zhang ◽  
Li Yun Peng ◽  
Jian Ye Wang ◽  
Abobakir Abdulali
Keyword(s):  
Mechanical Properties ◽  
Direct Shear Test ◽  
Shear Test ◽  
Physical And Mechanical Properties ◽  
Soil Improvement ◽  
Liquid Limit ◽  
Direct Shear ◽  
Test Results ◽  
Soil Slope ◽  
Capillary Water

The basic physical and mechanical properties of Libyan soil are analyzed through some experiments, including direct shear test, grading analysis test and compression test. According to the test results, the soil is named as low liquid limit silt featured by weak strength, high compressibility and permeability, which directly influences sub-grade stability, durability and pavement’s usability. In order to solve these problems, measures are discussed from two aspects, namely, soil improvement and construction method. The strength of the soil is apparently increased by the cement and lime adding, and the compressibility is decreased at the same time. And the rising height of capillary water reducing and protection forms for silt soil slope are also proved to be effective in the subgrade construction.

scholarly journals LIQUID LIMIT VALUES OBTAINED BY DIFFERENT TESTING METHODS

2017 ◽  
Vol 50 (2) ◽  
pp. 778 ◽  
Author(s):  
G. Kollaros
Keyword(s):  
Linear Regression Analysis ◽  
Correlation Coefficients ◽  
Liquid Limit ◽  
Natural Soil ◽  
Cone Penetrometer ◽  
Atterberg Limit ◽  
Limit Values ◽  
Soil Material ◽  
Stabilized Soil

Specifications in European countries include a variety of methods for determining the liquid limit based on Casagrande type devices and on the fall cone penetrometer. The results of a comparative study of the liquid limits determined using these two fall-cone methods are presented for lime stabilized soil. Soil material sampled in the area of Evros Regional Unit has been stabilized with lime in order to enhance its engineering characteristics. The soil and the soil-lime mixtures subjected in Atterberg limit testing. The liquid limit values were correlated through a linear regression analysis with the rest of the consistency limits of both the natural soil and its mixtures with various lime contents. The correlation coefficients in all cases were high, with those referring to results obtained by the Casagrande method to be dominant. The comparison of liquid limit values determined by either method showed that there is a systematically good correlation between them, with the decrease rate in function of the lime content in the mixture to be more intense in the case of the drop-cone procedure. There is a need for a universal specification for the determination of the consistency limits. 

scholarly journals Perbaikan Subgrade pada Jalan Kampung Keramat di Kota Pangkalpinang dengan Menggunakan Kapur Padam Sebagai Bahan Stabilisasi Tanah

2020 ◽  
Vol 17 (1) ◽  
pp. 22-30
Author(s):  
Ferra Fahriani ◽  
Desy Yovianti ◽  
Eko Saputra ◽  
Merley Misriani
Keyword(s):  
Specific Gravity ◽  
Soil Stabilization ◽  
Clay Soil ◽  
Liquid Limit ◽  
Soil Conditions ◽  
Atterberg Limit ◽  
Limit Values ◽  
The Road ◽  
On The Road ◽  
Soil Gradation

Soil is the main support in a construction. Unstable soil conditions, especially in the subgrade can cause damage to the road. Based on the results of a direct survey in the field, it was found that the condition of the Jalan Kampung Keramat in Pangkalpinang City was damaged. This might be caused by the condition of the subgrade on the road which is unstable and the subgrade is categorised as clay soil type. This study aims to improve the subgrade on Jalan Kampung Keramat in Pangkalpinang City by using limestone as a soil stabilization material. This study used an experimental method in the laboratory by making mixture between clay soil and limestone with four different variations in the percentage of limestone, namely 0%, 3%, 5%, 7%. There are four parameters of the mixed characteristics that are tested and analysed, namely: the Atterberg limit, specific gravity, soil gradation and CBR value. The results show that the Atterberg limit values ​​(liquid limit-LL and plasticity index-IP) and specific gravity tend to decrease with increasing percentage of limestone extinguished. However, the plastic limit value (PL) shows the opposite tendency, i.e. it increases with the decreasing percentage of limestone. The specific gravity values ​​obtained based on the percentage of lime outages (0%, 3%, 5%, 7%) are 2.63, 2.61, 2.60, and 2.58, respectively. In addition, the addition of limestone causes changes in soil gradation, namely the addition of retained fraction # No.200 and the reduction of passed fraction # No.200. The Addition of limestone can increase the CBR value of the soil, where the addition of 7% of limestone produces the highest CBR value (21.3%) compared to 5% limestone (15.7%), 3% limestone (13.4%) and 0% limestone (11.2%). Therefore, using limestone can improve quality of subgrade, which can be seen from the value of CBR obtained.  

scholarly journals Site Characterization for Construction Purposes at FUNAAB using Geophysical and Geotechnical Methods

2018 ◽  
Vol 65 (2) ◽  
pp. 89-102
Author(s):  
A.A. Alabi ◽  
A.O. Adewale ◽  
J.O. Coker ◽  
O.A. Ogunkoya
Keyword(s):  
Groundwater Potential ◽  
Liquid Limit ◽  
Deep Foundations ◽  
Groundwater Abstraction ◽  
Surface Layers ◽  
Atterberg Limit ◽  
Surface Information ◽  
Limit Test ◽  
Electrical Sounding ◽  
High Plastic

AbstractGeophysical and geotechnical techniques were used to investigate the sub-surface information of a proposed site for a hostel construction at Federal University of Agriculture, Abeokuta. Ten vertical electrical sounding (VES) stations were adopted. Typical sounding curves obtained include the HA, KH, AKH and KQH types, of which the AKH-type consists of 40% of the survey points, and a maximum of five geo-electric sub-surface layers were delineated. Laboratory analyses were performed to investigate particle size distribution, Atterberg limit, compaction limit, California bearing ratio (CBR) and specific gravity. The CBR revealed that all soil samples, except L4, are mechanically stable and have high load-bearing capacity. The Atterberg limit test and the geo-electric section showed that the second layer of VES 4 is composed of sandy clay with high plastic index and low liquid limit, which may pose a threat to the foundation of any engineering structure. VES locations 5, 6 and 8 were identified as high groundwater potential zones suitable for optimum groundwater abstraction. The study area is suitable for both shallow and deep foundations, however VES 4 and VES 5 require reinforcement.

scholarly journals Determination of Types and Characteristics of Laterite Soil as Basic Land for Building Construction

2021 ◽  
Vol 930 (1) ◽  
pp. 012041
Author(s):  
D Chandrasasi ◽  
S Marsudi ◽  
E Suhartanto
Keyword(s):  
Soil Characteristics ◽  
Building Construction ◽  
Sieve Analysis ◽  
Direct Shear ◽  
Laterite Soil ◽  
Atterberg Limit ◽  
Central Java ◽  
Property Index

Abstract Laterite soil is red soil because it contains iron and aluminum. It is an old type of soil, so it is suitable for all plants. Laterite soils are located in the reservoir area of the Wonogiri Dam - Central Java. The nature of laterite soil that quickly absorbs water and the soil texture is strong and dense indicates the type of soil used for a mixture to make roads. This study aims to identify and characterize the lateritic soils to support the construction of roads that will be used. It is needed to test the soil’s property index, including moisture content test, density test, Atterberg limit, and grain sieve analysis. At the same time, it tested the classification of laterite soil characteristics using standards of USCS and AASHTO. To test the shear strength of the laterite soil is using Direct Shear. Based on the analysis, the laterite soil from sedimentation in Wonogiri dam is classified as poor and does not meet the requirements to be used as a subgrade in building construction. It can be considered include need to improve to carried out first.

scholarly journals Penelitian Stabilitas Struktur Tanah Lempung Bersifat Monmorillonite Menggunakan Limbah Ampas Kopi

2021 ◽  
Vol 3 (1) ◽  
pp. 34
Author(s):  
Hadi Santoso ◽  
Yosef Cahyo ◽  
Ahmad Ridwan ◽  
Dwifi Aprillia Karisma
Keyword(s):  
Liquid Limit ◽  
Plastic Limit ◽  
Atterberg Limit

Dalam bidang konstruksi Tanah adalah suatu media pijakan inti dari sebuah bangunan. Struktur Tanah yang sebagian banyak terdapat lempung didalam komponennya adalah bersifat Monmorillonite. Tingkat stabilitas tanah yang bersifat Montmorillonite terbilang kurang bagus terhadap daya topang infrastruktur bangunan. Cara stabilitas tanah pada penelitian berikut adalah dengan menggunakan limbah ampas kopi pada variasi penambahan 5%, 10%, 15% dan 20% pada tanah Montmorillonite. Pada test uji stabilitas tanah adalah dengan menggunakan benda uji mix tanah montmorillonite dengan limbah ampas kopi dengan melakukan uji Berat Isi, Batas konsistensi (Atterberg Limit) dan Pemadatan Tanah (Proctor). Pada hasil penelitian struktur tanah asli dikategorikan momoroillonite dan setelah ditambah ampas kopi pada penambahan divariasi maksimal sebesar 20%, nilai Liquid Limit naik menjadi 43% dan nilai Plastic Limit mengalami kenaikan menjadi 31,64%, sehingga index plastic dapat mengalami peningkatan menjadi 11,36%. Saat uji pemadatan dengan kondisi benda uji padat sempurna, berat volume kering tanah asli sebesar 6,72 gr/cm3 dan setelah ditambahkan limbah ampas kopi sebesar 20% mengalami peningkatan berat volume kering menjadi 10,56 gr/cm3.

Effects of Glass Fines on the Geotechnical Properties of Cement Stabilized Lateritic Soil

2019 ◽  
Vol 45 ◽  
pp. 42-52 ◽  
Author(s):  
Solomon I. Adedokun ◽  
Johnson R. Oluremi ◽  
Damilare S. Obebe
Keyword(s):  
Soil Sample ◽  
Cement Content ◽  
Liquid Limit ◽  
Geotechnical Properties ◽  
Lateritic Soil ◽  
Sieve Analysis ◽  
Plastic Limit ◽  
Atterberg Limit ◽  
Stabilized Soil ◽  
Composite Mixture

Effect of glass fines and cement as a composite mixture on the geotechnical properties of a poor lateritic soil obtained from a borrow pit at Aroje, Ogbomoso, Nigeria was investigated as a reuse method of managing wasted glass. Glass fines up to 12% at intervals of 4% by mass of the soil sample were added to the lateritic soil stabilized with cement of 0, 2, 4, and 6% by mass of the soil sample. Sieve analysis, Atterberg limit, British Standard (BS) Compaction, California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) tests were conducted on the stabilized soil specimens. Results showed that Liquid Limit (LL), Plastic Limit (PL) and Plasticity Index (PI) decreased while compaction and UCS of the lateritic soil increased from 0 to 8% addition of glass fines. The CBR of the soil increased continuously from 0 to 12% glass contents. However, addition of cement increased the LL and PI while it decreased the PL between 0 and 4% but increased beyond this range. The compaction, UCS and CBR of the stabilized soil increased significantly with increasing cement content. Hence, the soil can be stabilized with the addition of 8% glass fines and 6% cement content to be used as improved subgrade material for construction of light trafficked pavement.

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