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All Journal INTEKNA Info-Teknik Panrita Abdi - Jurnal Pengabdian pada Masyarakat Jurnal Serambi Engineering Serambi Engineering
Yusti Yudiawati
Politeknik Negeri Banjarmasin
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Other

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Journal : Jurnal Serambi Engineering

 1 
Peningkatan Parameter Mekanis Tanah Lempung Plastisitas Tinggi sebagai Bahan Timbunan dengan Penambahan Kapur Yusti Yudiawati; Nur Fitriah
Jurnal Serambi Engineering Vol 7, No 4 (2022): Oktober 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i4.4925

Abstract

The clay plasticity can be reduced chemically using lime which contains Ca++ and Mg++ to neutralize the swelling and shrinkage properties. The test soil sample from Teluk Mesjid Village, Balangan Regency, has a 51% liquid limit, a 30.45% plastic limit and 20.55 Plastic Index, it is not specified as an embankment material. The lime percentage was based on plasticity test on soil mixed with 4%, 6% and 8% lime. Direct shear and independent compressive strength tests were carried out on the original soil samples and soil samples with addition of 6% lime resulting from standard and modified compaction as well as CBR tests for unsoaked and soaked conditions. The lime addition reduced the Plasticity Index greatly from 20.55% to 5.84% or to low plasticity category. Soil cohesion increased up to 100%. The shear angle increased was only 2-3°. The ultimate bearing capacity of the free compression test from modified compaction increased significantly up to 100%. The increase in CBR value in soaked conditions reached 59.6% to 63%. The soaked CBR value with lime addition increased from 7% to 17.4% or increased for 2.48 times.
Perbaikan Kuat Geser Pasir Bergradasi Buruk dengan Penambahan Abu Cangkang Yusti Yudiawati; Muhammad Syawaluddin
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.5973

Abstract

Based soil that does not meet technical requirements is a problem for construction executant in South Kalimantan. One of them is loose sand soil. Stabilization is carried out to improve the physical and mechanical properties of loose sand using palm shell ash waste. Sand samples were released from Bangkal village, Cempaka District, Banjarbaru. The study was conducted by adding palm shell ash to mixed variations of 0%, 5%, 10%, and 15%, to the weight of soil samples. And carried out physical and mechanical tests of the soil in the original condition and which was given a mixture of palm shell ash. The test resulted degradation in the specific gravity of the soil from 2.61 to 2.59 in 5% mixture, 2.58 in 10% mixture, and 2.56 in 15% mixture, the optimum moisture content from 15.46% to 2.08%, and the cohesion value from 0.107 kg/cm2 to 0.042 kg/cm2. It results an increase in dry fill weight from 1.47 gr/cm3 to 1.55 gr/cm3 and a shear angle value in the soil from 35.79° to 45.06°. The mixture of 15% is the optimal addition of palm shell ash that increases the shear strength of the soil.
Co-Authors Ahmad Marzuki Ahmad Norhadi Akhmad Marzuki Joni Irawan Muhammad Suhaimi Muhammad Syawaluddin Nur Fitriah Rusdiansyah