scholarly journals PERBANDINGAN PENGGUNAAN SEMEN DAN GARAM UNTUK STABILISASI TANAH DASAR

2019 ◽  
Vol 12 (2) ◽  
pp. 93
Author(s):  
Zuhrufah Diana Azza, Gerard Aponno, Dwi Ratnaningsih
Keyword(s):  
Bearing Capacity ◽  
Classification System ◽  
Soil Stabilization ◽  
American Association ◽  
Road Construction ◽  
Soil Classification ◽  
High Plasticity ◽  
The Road ◽  
State Highway ◽  
Before And After

Soil is the key of the road foundations. Soil of high CBR value will have good bearing capacity for road construction. Conversely, soil stabilization must be carried out to the subgrade that has bad bearing capacity. The goals of this analysis are to find out the soil characteristict of before stabilization, CBR values of before and after stabilization, the optimum cement use and salt (NaCl) use as stabilizers.The results of soil poperties test in Silt High Plasticity (MH) based on Unified Soil Classification System (USCS) and A-7-5 based on American Association of State Highway and Transportation Official (AASHTO). The result of CBR without stabilization is 3.64% for standard soaked and 5.13%  for modified soaked. The maximum results of stabilized testing with cement showed 9.802 % CBR; 69.298% CBR of each sample respectively standard and modified soaked test; of salt showed 3.93% CBR; 5.33% CBR of standard and modified soaked test of each sample respectively.   Keywords: CBR, cement, NaCl, soil stabilization

scholarly journals Estabilização de Solos com um Aditivo a Base de Enzimas para fins Rodoviários

2018 ◽  
Vol 7 (3) ◽  
pp. 2-11
Author(s):  
Lucas Ribeiro dos Santos
Keyword(s):  
Classification System ◽  
American Association ◽  
Soil Classification ◽  
Mato Grosso ◽  
State Highway ◽  
Transportation Research

As soluções estabilizadoras de solos a base de enzimas surgiram recentemente no cenário da engenharia rodoviária brasileira, oferecendo aos engenheiros novas possibilidades na construção e recuperação de rodovias. Este artigo apresenta os resultados experimentais de uma pesquisa elaborada com o aditivo constituído pela solução enzimática ESS-X a fim de verificar a sua viabilidade técnica para a aplicação em solo típico da região norte do estado de Mato Grosso. O solo analisado é classificado pela American Association of State Highway and Transportation Officials-Transportation Research Board (TRB-AASHTO) e pela Unified Soil Classification System (UCSC) como sendo solo silto-argiloso A-4 (7) e como solo ML, respectivamente. Realizou-se análise experimental para a avaliação da resistência mecânica do solo com três dosagens do aditivo: 1/150 (recomendada pelas especificações técnicas), 1/300 e 1/600. Foram realizados os ensaios de resistência à compressão não-confinada (RCNC), absorção de água e Índice de Suporte Califórnia (ISC). Percebeu-se que no ensaio de RCNC que o aditivo influenciou de forma considerável as propriedades do solo, elevando em cerca 3,6 vezes a resistência mecânica do mesmo na dosagem 1/150, se comparado ao solo na condição natural. Quanto à absorção de água, o aditivo não proporcionou alteração relevante nessa propriedade, porém ofereceu maior estabilidade aos corpos de prova para a dosagem 1/150. Por fim, os ensaios de ISC indicaram que aditivo não ofereceu bons resultados para a elevação da capacidade de suporte do solo em condições submersas, se comparado ao solo sem aditivo.

scholarly journals PERUBAHAN KARAKTERISTIK FISIK DAN KUAT GESER TANAH LEMPUNG KABUPATEN PROBOLINGGO YANG DISTABILISASI MENGGUNAKAN CAMPURAN KAPUR DAN GARAM DAPUR (NaCl)

BANGUNAN ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 37
Author(s):  
Lutfi Indah Apriyani ◽  
I Wayan Jirna ◽  
Eko Setyawan
Keyword(s):  
Classification System ◽  
Direct Shear Test ◽  
Shear Test ◽  
American Association ◽  
Soil Classification ◽  
Direct Shear ◽  
State Highway

Abstrak:Pada beberapa daerah memiliki kondisi tanah yang kurang baik, dapat dilihat dari perubahan volume dan potensi pengembangan yang tinggi. Hasil penelitian pendahuluan terhadap tanah Desa Tamansari Kecamatan Dringu Kabupaten Probolinggo diketahui nilai IP = 37,802 persen dan persentase tanah lolos ayakan no. 200 sebanyak 53,440 persen. Berdasarkan klasifikasi sistem American Association of State Highway and Transportation Official (AASHTO), tanah tersebut termasuk dalam kelompok A–7–5(18) merupakan tanah berlempung yang tergolong tanah kurang baik/ buruk untuk dijadikan tanah dasar. Sedangkan menurut sistem Unified Soil Classification System (USCS), tanah tersebut termasuk dalam kelompok OH yaitu lempung organik dengan plastisitas sedang sampai tinggi. Penelitian ini bertujuan untuk (1) mengetahui perubahan yang terjadi pada karakteristik fisik dan (2) perubahan kuat geser tanah lempung yang distabilisasi menggunakan kapur dan garam dapur. Pada penelitian ini menggunakan metode eksperimental. Persentase penambahan campuran kapur dan garam dapur yaitu 0 persen kapur dan 0 persen garam dapur; 10 persen kapur dan 25 persen garam dapur; 15 persen kapur dan 20 persen garam dapur; 20 persen kapur dan 15 persen garam dapur; dan 25 persen kapur dan 10 persen garam dapur. Pengujian yang dilakukan yaitu untuk peninjauan tentang karakteristik fisik tanah yaitu uji LL, PL, dan SL, sedangkan peninjauan kuat geser tanah dilakukan uji geser langsung (direct shear test). Dari hasil penelitian yang diperoleh menunjukkan tanah mengalami perubahan perbaikan karakteristik fisik dan kuat geser tanah (τf) setelah distabilisisai dengan kapur dan garam dapur. Perubahan tanah yang paling baik terjadi pada penambahan kapur 10 persen dan garam dapur 25 persen. Nilai IP tanah asli sebesar 37,802 persen, setelah distabilisasi dengan penambahan tersebut turun menjadi 5,682 persen. Sedangkan nilai kuat geser tanah asli sebesar 0,222 kg/cm2, setelah distabilisasi dengan campuran tersebut naik menjadi 0,462 kg/cm2Kata-kata kunci: Tanah lempung, kuat geser, Stabilisasi, Kapur, Garam Dapur (NaCl) 

scholarly journals Peningkatan Nilai CBR Tanah Dasar (Sub Grade) dengan Penambahan Kapur dan Abu Sekam Padi

2019 ◽  
Vol 14 (2) ◽  
pp. 24
Author(s):  
Liliwarti -
Keyword(s):  
Bearing Capacity ◽  
Rice Husk ◽  
Soil Stabilization ◽  
Rice Husk Ash ◽  
Road Construction ◽  
Traffic Load ◽  
Rigid Pavement ◽  
The Road ◽  
Road Pavement ◽  
On The Road

The subgrade is very important on road construction, because its functions for support the traffic loads. The subgrade is not able to bearing capacity the traffic load , can cause damage such as cracks, settlement,and deformation on the flexible pavement or rigid pavement. to solve in this problems, it is necessary to improve the mechanical properties of subgrade for increasing soil bearing capacity and reducing the swelling potential. The Sicincin ring road - Lubuk Alung, Padang Pariaman district which has deformed, settlement and cracks on the road pavement, caused by poor bearing capacity of the subgrade. To solve these problems, it is necessary to have the soil improvements (stabilization) for subgrade In this paper soil stabilization is done by mixing soil with lime and rice husk ash (variations in lime content of 5%, 8%, 11%, 14% and 17%) and rice husk ash (constant 2.5%) .The compaction test and CBR test is carried for each variation. The results in this study obtained the most optimal percentage of lime + rice husk ash is 11%, CBR design is 25%, and swelling value of 0.13%. CBR value of subgrade without lime and rice husk ash obtained CBR = 2.3%. So that there is a significantly increase in CBR value if using lime and rice husk ash as stabilization material for subgrade. These results can be used by experts to choose effective stabilization methods.

scholarly journals Regional Geotechnical Mapping Employing Kriging on Electronic Geodatabase

2020 ◽  
Vol 10 (21) ◽  
pp. 7625
Author(s):  
Muhammad Usman Arshid ◽  
M. A. Kamal
Keyword(s):  
Bearing Capacity ◽  
Soil Classification ◽  
Geostatistical Analysis ◽  
Kriging Interpolation ◽  
Geospatial Information ◽  
State Highway ◽  
Capacity Evaluation ◽  
Geotechnical Investigations ◽  
Allowable Bearing Capacity ◽  
Spatial Analyst

A regional geotechnical map was developed by employing kriging using spatial and s geostatistical analysis tools. Many studies have been carried out in the field of topography, digital elevation modeling, agriculture, geological, crop, and precipitation mapping. However, no significant contribution to the development of geotechnical mapping has been made. For the appraisal of a geotechnical map, extensive field explorations were carried out throughout the geotechnically diversified plateau spread over an area of approximately 23,000 km2. In total, 450 soil samples were collected from 75 data stations to determine requisite index properties and soil classification for the subsequent allowable bearing capacity evaluation. The formatted test results, along with associated geospatial information, were uploaded to ArcMap, which created an initial input electronic database. The kriging technique of geostatistical analysis was determined to be more feasible for generating a geotechnical map. The developed map represents the distribution of soil in the region as per the engineering classification system, allowable bearing capacity, and American Association of State Highway and Transportation Officials (AASHTO) subgrade rating for 1.5-, 3.0-, and 4.5-m depths. The accuracy of the maps generated using kriging interpolation technique under spatial analyst tools was verified by comparing the values in the generated surface with the actual values measured at randomly selected validation points. The database was primarily created for the appraisal of geotechnical maps and can also be used for preliminary geotechnical investigations, which saves the cost of soil investigations. In addition, this approach allows establishing useful correlations among the geotechnical properties of soil.

scholarly journals Impact of the Kunming–Bangkok Highway on Land Use Changes along the Route between Laos and Thailand

Land ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 991
Author(s):  
Fangyu Zheng ◽  
Jiuming Huang ◽  
Zhiming Feng ◽  
Chiwei Xiao
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Sustainable Use ◽  
Road Construction ◽  
Buffer Zone ◽  
Scientific Basis ◽  
The Road ◽  
Cross Border ◽  
Before And After ◽  
The Impact

Road construction fragments the landscape, reduces connectivity, and drives land use changes. To our knowledge, little is known about the scope and intensity of the effects of cross-border roads on changes in land use. Here, with the land use data products provided by the US Agency for International Development’s SERVIR Mekong project, using the GIS-based spatial analysis to quantitatively analyze and compare the effects of the cross-border road on land use changes within a 30 km buffer area along the Kunming–Bangkok Highway between Laos and Thailand. The results show the following: The greater the distance was from the highway, the smaller were the overall changes in land use within the buffer zone. A comparison of the situation before and after the road was opened in 2013 revealed significant differences in the most influential land use types of agricultural expansion, i.e., from 47.07% to 52.07% (the buffer zone was 1 km). In particular, 57.32% (1381.93 ha) and 40.08% (966.46 ha) of the land occupied by forests had been converted into land for plantation and agriculture, respectively, from 2013 to 2018. The scope of the impact of the operational route on the dynamics of land use was inconsistent. The largest impact before the road became operational was within 4 km of the buffer zone (0.26 to 0.24). Once the road had been opened, the range of its impact was beyond 10 km (0.63 to 0.57). The work here can provide a scientific basis for regional transportation planning and the sustainable use of land resources.

scholarly journals ANALYSIS OF LATERITE SOIL WITH PORTLAND CEMENT MIXED VARIATIONS AND THE EFFECT ON THE CBR UNSOAKED

2021 ◽  
Vol 5 (2) ◽  
pp. 60-73
Author(s):  
Ahmad Ravi ◽  
Hurul 'Ain ◽  
Betti Ses Eka Polonia ◽  
M. Hanif Faisal
Keyword(s):  
Bearing Capacity ◽  
Soil Stabilization ◽  
Road Construction ◽  
Chemical Compounds ◽  
Soil Improvement ◽  
Expansive Clay ◽  
Traffic Loads ◽  
Construction Loads ◽  
Strength And Durability ◽  
Test Result

Ketapang and Kayong Utara Regency have road construction that often suffers damage before the planned life age caused by the behavior of expansive clay. The subgrade is a fundamental structure in building road construction because the subgrade will support traffic loads or construction loads. The strength and durability of the pavement structure road will depend on the properties and bearing capacity of the subgrade. Practically soil stabilization is a reinforcement engineering against foundation or subgrade by using mixed materials. Therefore, different soil improvement variations are needed. Based on the test result, the CBR value of Sukadana initially gets a 2.95% point. The CBR value for the 6% and 10 % mixture, respectively, gets 17.14% and 25.02%. The CBR value of Sungai Melayu Rayak originally get 4.65% point. Then, for the 6% and 10% mixture, the CBR values increased by 13.78% and 18%. The value of the bearing capacity of the highway soil construction can be know from the results of CBR testing on each variation. The CBR also can measure the strength of the soil. The addition of cement to the earth tends to increase the bearing capacity of the ground. It is because cement can function as a binder between soil particles with chemical compounds contained in cement.

scholarly journals Evaluation of soil replacement and cement grout injection in soil settlement

2021 ◽  
Vol 1 (2) ◽  
pp. 72-79
Author(s):  
Arief Andriansyah ◽  
Lusmeilia Afriani ◽  
Dyah Indriana Kusumastuti ◽  
Endro P. Wahono
Keyword(s):  
Bearing Capacity ◽  
Soil Stabilization ◽  
Soil Classification ◽  
Cement Grout ◽  
Sieve Analysis ◽  
Grout Injection ◽  
Toll Road ◽  
Dynamic Cone Penetrometer ◽  
Road Project ◽  
Soil Settlement

This paper discusses the process of original soil stabilization in Trans Sumatra Bakauheni-Terbanggi Besar Toll Road Project Package 2 Sidomulyo-Kotabaru. The soil replacement process was conducted at approximately 24 kilometres along the toll’s main road. The original soil bearing capacity analysis stage was by performing a Dynamic Cone Penetrometer (DCP) and Sondir test to analyze the deep of hard soil. A soil replacement was carried out to replace the original soil with soil that has appropriate specification. the piling up process was conducted in stages, which has Sandstone in such of the layer. The research done about the landfill sample was retaken and collected at 68 points. The stockpile soil samples collection was then followed by the analysis which was conducted in the laboratory to find the soil bearing capacity. There are 4 types of bearing capacity parameters analyzed, namely specific gravity, water content, aggregate analysis (Sieve Analysis), and consistency limit (Atterberg Limit). Referring to it, then there was the classification of soil types according to AASHTO M145 & Casagrande Soil Classification System. A point that has settlement after soil replacement is STA 52+000. So, there need to add soil stabilization, that is cement grout injection. Researchers analyzed the soil settlement by interpretation method. Results showed that soil replacement and cement grout injection could decrease a soil settlement by about 15.07 cm to become 0.93 cm.

scholarly journals Bearing capacity improvement of soft soil subgrade layer with Bio Stabilized Bacillus Subtilis

2018 ◽  
Vol 181 ◽  
pp. 01001
Author(s):  
Hasriana ◽  
Lawalenna Samang ◽  
Tri Harianto ◽  
M.Natsir Djide
Keyword(s):  
Bacillus Subtilis ◽  
Bearing Capacity ◽  
Soft Soil ◽  
Physical And Mechanical Properties ◽  
Road Construction ◽  
Untreated Soil ◽  
The Road ◽  
Maximum Value ◽  
Capacity Improvement ◽  
Dry Soil

The problem that is often faced in a road construction is a soil subgrade (soft soil). If the subgrade has a low bearing capacity, causing the soil to decrease greatly, so the road construction will quickly be damaged. Method to overcome the problem is bio stabilization with bacteria utilization. The purpose of this research is to know the bearing capacity improvement of soft soil as subgrade layer with bacteria solution of bacillus subtilis. Tests include soil physical and mechanical properties, compaction parameters and CBR tests. This test is based on ASTM for each test. Variations in addition of bacterial solution were 2%, 4%, 6%, 8% and 10% of dry soil weight with 7 days curing time. The results showed that the maximum value of CBR of soft soil was found at 39% on 6% bacterial solution. Increased CBR value from 2.8% to 39% or 13 times than untreated soil. This shows the use of bacterial concentration solution on soft soil significantly increases the bearing capacity.

Soil Stabilization for the Building of Unpaved Runways

2013 ◽  
Vol 723 ◽  
pp. 1060-1067
Author(s):  
Antonello Germinario ◽  
Antonella Schibani
Keyword(s):  
Bearing Capacity ◽  
Calcium Oxide ◽  
Laboratory Tests ◽  
Soil Stabilization ◽  
Soil Classification ◽  
California Bearing Ratio ◽  
Average Value ◽  
Planning Phase

This paper analyzes the bearing capacity of an unpaved runway built in Grazzanise military airport. Structural issues were studied during the planning phase. After carrying out tests required for soil classification, laboratory tests were carried out on different chemical stabilizers available on the market. Four test areas were created at the airport with the aim of finding the best solution in terms of bearing capacity and costs. These analyses showed that the best solution for soil stabilization was recycled ground pozzolan and calcium oxide and tests showed that this materials have a good CBR (California Bearing Ratio) average value.

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