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All Journal Jurnal Ilmiah Teknik Sipil Transukma
M Ikhwan Yani
Universitas Palangka Raya
Civil Engineering, Building, Construction & Architecture

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KORELASI NILAI HASIL UJI KUAT TEKAN BEBAS DENGAN NILAI CALIFORNIA BEARING RATIO (CBR) TANAH LEMPUNG: CORRELATION OF THE VALUE OF UNCONFINED COMPRESSIVE STRENGTH WITH CALIFORNIA BEARING RATION (CBR) VALUE OF CLAY SOIL Aditia Putra Pratama Situmorang; Okrobianus Hendri; M Ikhwan Yani
Jurnal Ilmiah Teknik Sipil TRANSUKMA Vol. 4 No. 1 (2021): Jurnal Penelitian TRANSUKMA
Publisher : Program Studi Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.12 KB)

Abstract

Daerah Katingan Kalimantan Tengah dilihat dari Atlas Peta Sebaran Tanah Lunak di Indonesia umumnya didominasi dengan tanah lempung lunak yang memiliki daya dukung umumnya rendah sehingga dapat berpotensi menimbulkan kendala dalam pekerjaan konstruksi berupa perosokan (settlement). Oleh sebab itu pada penelitian ini dilakukan studi mengenai korelasi antara nilai CBR (California Bearing Ratio) dan Kuat Tekan Bebas Tanah Lempung di Daerah Kampung Banjar Kecamatan Kasongan Kabupaten Katingan. Pengujian ini dilakukan untuk mengetahui karakteristik fisik dan dan mekanis tanah asli. Data yang didapatkan kemudian dilakukan analisis data dengan mencari hubungan satu sama lain (korelasi) menggunakan regresi linear atau dengan menggunakan regresi yang paling sesuai untuk mendapatkan hubungan antar parameter yang berguna untuk memperkirakan nilai CBR laboratorium dan Kuat Tekan Bebas. Berdasarkan pengujian yang telah dilakukan didapatkan nilai kuat tekan bebas pada 5 titik di daerah Kampung Banjar Kecamatan Kasongan Kabupaten Katingan yakni 0,580 kg/cm2; 0,485 kg/cm2; 0,518 kg/cm2; 0,550 kg/cm2; 0,548 kg/cm2. Sedangkan nilai %CBR pada masing-masing titik yakni 3,08%; 3,02%; 4,05%; 5,01%; dan 6,30%. Dari nilai tersebut didapatkan korelasi antara nilai kuat tekan bebas dan California Bearing Ratio (CBR) menggunakan persamaan regresi liner yakni %CBR = 1,872 qu + 2,0102.   The Katingan area, Central Kalimantan, as seen from the Atlas of Soft Soil Distribution Map in Indonesia is generally dominated by soft clay soils which have generally low bearing capacity so that they can potentially cause obstacles in construction work in the form of settlements. Therefore, in this study, a study was conducted on the correlation between the value of CBR (California Bearing Ratio) and the unconfined Compressive Strength of Clay in the Banjar Village, Kasongan District, Katingan Regency. This test was conducted to determine the physical and mechanical characteristics of the original soil. The data obtained are then analyzed by looking for relationships with each other (correlation) using linear regression or by using the most appropriate regression to obtain relationships between parameters that are useful for estimating laboratory CBR and unconfined compressive strength. Based on the tests that have been carried out, the value of the unconfined compressive strength at 5 points in the Banjar Village, Kasongan District, Katingan Regency is 0.580 kg/cm2, 0.485 kg/cm2, 0.518 kg/cm2, 0.550 kg/cm2, 0,548 kg/cm2. While the %CBR values ​​at each point are 3,08%, 3,02%, 4,05%, 5,01%, dan 6,30%. From this value, the correlation between the value of unconfined compressive strength and the California Bearing Ratio (CBR) was obtained using a linear regression equation is %CBR = 1,872 qu + 2,0102.
PENGARUH PENAMBAHAN POTONGAN BAN BERSERAT NILON DAN SEMEN PORTLADN TERHADAP NILAI CBR TANAH LEMPUNG: THE EFFECT OF ADDITIONAL CUTTING OF NYLON FIBER TIRES AND PORTLAND CEMENT ON CBR VALUE OF CLAY SOIL Dede oktaris milano Dede; Fatma Sarie; M Ikhwan Yani
Jurnal Ilmiah Teknik Sipil TRANSUKMA Vol. 4 No. 1 (2021): Jurnal Penelitian TRANSUKMA
Publisher : Program Studi Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (387.977 KB)

Abstract

 Berdasarkan hasil survei lapangan di Desa Tewang Rangkang, Kecamatan Pulau Malan, Kabupaten Katingan kondisi jalan didaerah tersebut didominasi oleh tanah lunak. Tanah lunak sangat berpengaruh didalam pada pembangunan kontruksi pondasi jalan dan konstruksi pondasi bangunan. Penelitian ini bertujuan untuk menganalisis hasil stabilisasi tanah dengan penambahan potongan ban berserat nilon dan semen portland dengan variasi penambahan campuran 5% semen portland dan 5%; 7,5%; 10%; 12%; 15% untuk potongan ban berserat nilon dengan masa pemeraman 7 Hari. Hasil pengujian sifat fisik tanah asli diperoleh nilai, kadar air (w) = 44,12%; berat isi =1,30 g/cm3; berat jenis(Gs) = 2,70; LL = 41,00; PL =24,04; IP =16,96; SL =15,89. Menurut sistem USCS dari hasil pemeriksaan batas cair (LL) dan indeks plastisitas (PI) didapat bahwa diklasifikasikan sebagai tanah berlempung dalam kelompok A-7-5 (8). Hasil  pengujian sifat mekanik tanah asli menunjukan bahwa nilai CBR tanah asli 2,09%; berat isi kering  = 1,572%; kadar air optimum (OMC) = 19,82%. Campuran potongan ban berserat nilon dan semen portland berdampak pada peningkatan nilai CBR. Penambahan variasi campuran 5% semen portland dan 5%; 7%; 10%; 12,5%; 15% menghasilkan nilai CBR rencana yang meningkat sebesar 2,90%; 4,90%; 4,08%; 3,40%; 2,20%; 2,15% di pemeraman 7 hari. Nilai CBR terbesar terjadi pada penambahan semen portland 5% dan 5% potongan ban berserat nilon, pada pemeraman 7 hari yaitu sebesar 5,30%, CBR meningkat 154,55% dari nilai CBR tanah asli.   Based on the results of a field survey in Tewang Rangkang Village, Pulau Malan District, Katingan Regency, the road conditions in the area are dominated by soft soil. Soft soil is very influential in the construction of road foundations and construction of building foundations. This study aims to analyze the results of soil stabilization with the addition of pieces of nylon fiber tires and portland cement with variations in the addition of a mixture of 5% portland cement and 5%; 7.5%; 10%; 12%; 15% for nylon fiber tires with a curing period of 7 days. The results of testing the physical properties of the original soil obtained values, water content (w) = 44.12%; fill weight = 1.30 g/cm3; specific gravity (Gs) = 2.70; LL = 41.00; PL = 24.04; IP = 16.96; SL = 15.89. According to the USCS system, the results of the examination of the liquid limit (LL) and the plasticity index (PI) were found to be classified as loamy soils in group A-7-5 (8). The results of testing the mechanical properties of the original soil showed that the CBR value of the original soil was 2.09%; dry weight (γdmax) = 1.572%; optimum water content (OMC) = 19.82%. The mixture of nylon fiber tires and portland cement has an impact on increasing the CBR value. The addition of a mixture variation of 5% portland cement and 5%; 7%; 10%; 12.5%; 15% resulted in an increased plan CBR value of 2.90%; 4.90%; 4.08%; 3.40%; 2.20%; 2.15% at 7 days curing. The largest CBR value occurred in the addition of 5% portland cement and 5% nylon fiber tire pieces, at 7 days curing which was 5.30%, the CBR increased by 154.55% from the original soil CBR value.
Co-Authors Aditia Putra Pratama Situmorang Dede oktaris milano Dede Okrobianus Hendri