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Syafruddin Syafruddin
PS T. Sipil FT Unlam
Engineering

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Pengaruh Preloading terhadap Kuat Geser Undrain Syafruddin Syafruddin
INFO-TEKNIK Vol 9, No 2 (2008): INFOTEKNIK VOL. 9 NO. 2 2008
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v9i2.1752

Abstract

Clay is kind of soil with fine grained that has low bearing capacity. Preloading cause change to water content and void ratio, result consolidation process. Consolidation on the clay cause big problem to the construction, that's why improvement characteristic of the clay is needed.The objective of this study is to know how much increasing undrain shear strength (Cu) to the clay consolidation degree as a part of effort to improvement the soil.  In this experiment, Consolidation Test is preformed, the preloading to object test with consolidation degree at 10%, 20%, 30%, 40%, 50%, 70%, and 90%, and Unconfined Compression Test (UCT) as the last test on this experiment.The result of this study is a undrain shear strength equation (∆Cu)= -2.10-10U5-2.108U4+7.10-8U3+1.10-5U2+0,0015U-0,0008 for Penggalaman’s clay soil, as a reference to clay soil improvement.
Hubungan Teoritis Antara Berat Isi Kering dan Kadar Air untuk Menentukan Kepadatan Relatif Syafruddin Syafruddin
INFO-TEKNIK Vol 8, No 2 (2007): INFOTEKNIK VOL. 8 NO. 2 2007
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v8i2.1735

Abstract

Soil stabilization can be done with a few way, by increasing soil density or compaction. Compactable soil can increase soil strength and bearing capacity to working payload.Laterite soils as embankment soil that stabilized with compacting method, influenced by water content, dry unit weight and compacting dissociation energy. To know theoretical connection between water contents,  dry unit weight, degree of saturation  and energy of compaction is done in laboratory with method Standard Proctor and Modified Proctor to know optimum water content zone at some Sr and determines minimum energy that needed to gets relative density of 90% ( RC 90%) so that economic compacting can be reached.From result of this research, it is gotten that optimum water content resided at Sr 75% and there is no compacting curve cuts Sr 100% ( ZAV).By using theoretical connection between dry unit weight , water content, Sr and compacting energy, it can determine the water content zone and minimum energy that needed to reachs relative density of 90% ( RC 90%).
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