scholarly journals PENGARUH PENAMBAHAN PASIR TERHADAP TINGKAT KEPADATAN DAN DAYA DUKUNG TANAH LEMPUNG BERLANAU (STUDI KASUS : JALAN BANJARPARAKAN – MENGANTI)

2022 ◽  
Vol 3 (1) ◽  
Author(s):  
Fauzia Nur Amrulloh ◽  
Amris Azizi
Keyword(s):  
California Bearing Ratio

Daya dukung tanah merupakan hal yang sangat perlu diperhatikan dalam perencanaan pekerjaan konstruksi bangunan maupun jalan. Hal ini dikarenakan tanah berfungsi sebagai media penahan beban dari konstruksi yang ada di atasnya. Stabilisasi menggunakan bahan tambah pasir merupakan salah satu cara untuk memperbaiki daya duukung tanah. Dalam penelitian ini tanah yang distabilisasi adalah jenis tanah lempung berlanau yang berasal dari ruas Jalan Banjarparakan–Menganti pada sta 0+175 sampai 0+225, Kecamatan Rawalo, Kabupaten Banyumas–Provinsi Jawa Tengah. Penelitian ini dilakukan dengan menggunakan campuran pasir dengan variasi campuran 10%, 15%, 20%, dan 25%. Uji dilakukan untuk mendapatkan nilai CBR (California Bearing Ratio), berat jenis, batas– batas Attereberg sampel tanah. Hasil uji diperoleh kadar air optimum 36,1% dengan kepadatan kering maksimum 1,29 gr/cm3 dan nilai daya dukung tanah sebesar 8,20% untuk sampel tanah tanpa penambahan pasir. Untuk sampel tanah dengan campuran pasir 10% diperoleh nilai kadar air optimum 34,5% dengan kepadatan kering maksimum 1,33 gr/cm3 dan nilai daya dukung tanah sebesar 10%. Untuk sampel tanah dengan campuran pasir 15% diperoleh nilai kadar air optimum 32,6% dengan kepadatan kering maksimum 1,35 gr/cm3 dan nilai daya dukung tanah sebesar 11,1%. Untuk sampel tanah dengan campuran pasir 20% diperoleh nilai nilai kadar air optimum 30,1% dengan kepadatan kering maksimum 1,37 gr/cm3 dan nilai daya dukung tanah sebesar 12,3%. Untuk sampel tanah dengan campuran pasir 25% diperoleh nilai nilai kadar air optimum 28,05% dengan kepadatan kering maksimum 1,39 gr/cm3 dan nilai daya dukung tanah sebesar 12,7%.

Efficient computational techniques for predicting the California bearing ratio of soil in soaked conditions

2021 ◽  
pp. 106239
Author(s):  
Abidhan Bardhan ◽  
Candan Gokceoglu ◽  
Avijit Burman ◽  
Pijush Samui ◽  
Panagiotis G. Asteris
Keyword(s):  
California Bearing Ratio ◽  
Computational Techniques

ELM-based adaptive neuro swarm intelligence techniques for predicting the California bearing ratio of soils in soaked conditions

2021 ◽  
pp. 107595
Author(s):  
Abidhan Bardhan ◽  
Pijush Samui ◽  
Kuntal Ghosh ◽  
Amir H. Gandomi ◽  
Siddhartha Bhattacharyya
Keyword(s):  
Swarm Intelligence ◽  
California Bearing Ratio

scholarly journals Effects of Palm Kernel Shell Ash on Lime-Stabilized Lateritic Soil

2017 ◽  
Vol 25 (3) ◽  
pp. 1-7 ◽  
Author(s):  
Emeka Segun Nnochiri ◽  
Olumide M. Ogundipe ◽  
Opeyemi E. Oluwatuyi
Keyword(s):  
Palm Kernel ◽  
Soil Samples ◽  
California Bearing Ratio ◽  
Lateritic Soil ◽  
Optimum Amount ◽  
Lime Stabilization ◽  
Palm Kernel Shell

Abstract The research investigated the effects of palm kernel shell ash (PKSA) on lime-stabilized lateritic soil. Preliminary tests were performed on three soil samples, i.e., L1, L2 and L3 for identification; the results showed that L1 was A-7-6, L2 was A-7-6, and L3 was A-7-6. The optimum amount of lime for each of the soil samples was achieved. The optimum amount for L1 was 10%, for L2, 8% and for L3, 10%; at these values they recorded the lowest plasticity indexes. The further addition of PKSA was performed by varying the amount of PKSA and lime added to each of the soil samples. The addition of 4% PKSA+ 6% lime, the addition of 4% PKSA + 4% lime, and the addition of 4% PKSA + 6% lime increased the California Bearing Ratio (CBR) to the highest values for L1, L2 and L3 from 8.20%. It was concluded that PKSA can be a suitable complement for lime stabilization in lateritic soil.

scholarly journals Multivariate Assessment of California Bearing Ratio with Contrasted Geotechnical Properties of Soils in Ilorin-Lokoja Highway

2021 ◽  
Author(s):  
Attah Fakeye ◽  
Olusegun Ige ◽  
Olufemi Ogunsanwo
Keyword(s):  
Road Construction ◽  
Principal Component ◽  
Hierarchical Cluster ◽  
Coarse Sand ◽  
Plasticity Index ◽  
California Bearing Ratio ◽  
Coefficient Of Determination ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Free Swell

California Bearing Ratio (CBR) is an important parameter used in designing pavement layers in road construction but testing this parameter requires time, labor, and huge cost. The study therefore applies multivariate approach to evaluate CBR based on contrasted geotechnical parameters along Ilorin-Lokoja highway. The results obtained showed that the migmatite-gneiss-derived soils are slightly more fines (< 0.075 mm; 7.4–59.6%), more plastic (PI; 1.6–39%), and have low strength (MDD = 1.8 mg/m3; CBR = 29.0%) than the metasediments (11–57.7%, 2.0–30%, 1.6 mg/m3, 23.6%) and older granite soils (8.2–32.7%, 2.6–13.4%, 1.7 mg/m3, 27.8%), respectively. The principal component analysis (PCA) revealed three major components (eigenvalues >1) which accounted for 83.8% of the total variance at the rate of 33.4, 14.7, and 11.4%. Major contributing variables for the components were fines (R = 0.87), plasticity index (R = 0.7), and coarse sand (R = 0.67%). Spatial distribution of these groups established interplay of sediment-gradation and moisture-connection evident in hierarchical cluster analysis that revealed patterns of homogeneity and soil relationships. Regression analysis established five models from predictor variables such as fines, activity, free swell, liquid and plastic limits, weighted plasticity index, optimum moisture content, and maximum dry density with the coefficient of determination (R2 = 0.33) and root mean square error (RMSE) of 7.80.

scholarly journals Mejoramiento de subrasantes de tipo arcilloso mediante la adición de escoria de acero

2020 ◽  
Vol 11 (1) ◽  
pp. 185-196
Author(s):  
Miguel Ángel Ospina-García ◽  
Saieth Baudilio Chaves-Pabón ◽  
Luis Miguel Jiménez-Sicachá
Keyword(s):  
California Bearing Ratio

El presente trabajo evalúa el comportamiento de mezclas de suelo arcilloso mediante la adición de esco-ria de acero, comparando con los criterios de calidad para ser una subrasante vial. El comportamiento de la mezcla de escoria de acería con arcilla caolinita, se estableció con una matriz de dosificación de au-mento gradual, en porcentajes de: 25, 50 y 75%, a través del tamiz N°4. Los resultados indican que la escoria de acería funciona en materiales cohesivos, reduciendo la plasticidad hasta un 0%, y aumentan-do el valor del California Bearing Ratio, CBR, en un 378.92%. Se concluye que la escoria de acero, es un excelente complemento para mejorar las propiedades físicas y mecánicas de una subrasante de arcilla caolinita. En una primera aproximación, la dosificación más recomendada es de un 25%, debido a que la disminución en la resistencia a la compresión e índice de plasticidad no fue tan alta como en las otras dosificaciones, pero si aumenta el índice CBR y la densidad.

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