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Bambang Pardoyo
Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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Journal : TEKNIK

 1 
Perbaikan Tanah Lempung Ekspansif Menggunakan Soda Api (NaOH) Pardoyo, Bambang; Wardani, Sri Prabandiyani Retno; Partono, Windu
TEKNIK Vol 39, No 1 (2018): (July 2018)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (485.683 KB) | DOI: 10.14710/teknik.v39i1.14945

Abstract

An expansive clay is soil material that is composed of various minerals include kaolinite, montmorillonite and illite group. Mineral montmorilinite have the sensitivity to the effects of the water is very easy to swell and shrink. High and low levels of swelling and shrinkage (shrinkage) expansive clay is determined by the high and low content of montmorillonite on expansive clay granules. Because of these properties are very high content of montmorillonite often cause problems in the building. This study uses a solution of Soda Api (NaOH) as a stabilizer through the compaction process Modified Proctor on (OMC + 7,5%)  Proctor standard by the number of collisions each - each is 10 x, 25x and 56x, and the amount of additional water on weight soil  dry , with variations in increments of  water by 95% : 5% NaOH, water by 90%: 10% NaOH and water by 85% : 15% NaOH. This research was conducted testing - testing in the laboratory include: Index properties, Swelling Pressure, Swelling Potential and CBR with curing and no curing. Results - results in these tests show that the value of the property index showed an increase, Test UCS showed an decrease, Test CBR by soaking at the age of 7 days with a mixture of caustic soda 10% showed the best results, while the pressure test expands and Test Potential expands decreased significant.
Analisis Uji Geser Tanah Merah Residual dengan Metode Slurry di Kabupaten Semarang Pardoyo, Bambang; Wirawan, Briota Akhbar; Huda, Khoirul
TEKNIK In Press
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v42i1.33261

Abstract

Residual soil is found in most areas with mountainous, hilly, and undulating topography. This soil is marked by red or brown color. This study aims to determine the physical and mechanical properties of soil in the original soil and residual soil conditions using the slurry method. Research objects were taken from residual red soil of The East Ungaran District, Bergas District, and Bawen District. Analysis of the physical and mechanical properties test shows that the soil sample is a type of clay with kaolinite constituent minerals and moderate swelling ability, and direct shear testing from locations L1, L2, and L3 obtained residual peak shear angles using the slurry method of 29,249 °; 31,341 °; 31,964 ° and constant residual shear angle value of 8,082 °; 8,138 °; 7,294 °, the value of the original soil shear angle has a value of 32.82 °; 31.44 °; 31.98. The higher the value of the plasticity index, the higher the value of the free swell. The relationship between the plasticity index and the value of the residual peak shear angle shows that the results of the peak shear angle and the plasticity index are still within the scope of standard deviation. The value of the constant residual shear angle with the slurry method is much smaller than the test result graph.
Co-Authors Arif Hidayat Carita, Nensi Danang Dwi Admojo, Danang Dwi Elsimanata Putro Gunasro, Andreas Himawan Indarto Hussein, Muhammad Fahri Indrastono Indrastono Indrastono, Indrastono Ita Puji L, Ita Khoirul Huda Kresno Wikan Sadono muhrozi muhrozi, muhrozi Mulyanto, Arya Budi Nuprayogi, Rizqi Nur Fahria R, Nur Prastiwi, Yulita Arni Raditya, Michael Alfa Rafiando, Rafiando Rizqullah, Mochammad Kemal Saputra, Nugraha Eka Sari, Undayani Siti Hardiyati Sri Prabandiyani Retno Sari Sri Prabandiyani Retno Wardani Sri Prabandiyani RW, Sri Ulayya, Inandhiya Ayu Undayani Cita Sari Wahyu Rahmat Ramadhan Widodo, Tanur Windu Partono Wirawan, Briota Akhbar Yulita Arni Priastiwi Zainuddin, Zainuddin