PENGARUH PERUBAHAN KADAR AIR TANAH AKIBAT SIKLUS BASAH-KERING TERHADAP PARAMETER KEKUATAN DAN PENGEMBANGAN TANAH LEMPUNG
| Main Authors: | , DHANUR WICAKSONO, , Ir. Agus Darmawan Adi, M.Sc., Ph.D. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2014
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/130138/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=70553 |
Daftar Isi:
- Clay has a great sensitivity to changes in soil moisture content, expands when the moisture content rise, and shrink when the moisture content down. This study, conducted to determine the effect of changes in soil moisture content on the strength and swell of clay, especially on clay soil on the surface. In order to simulate the changes in the moisture content of the soil surface in the field, then clays treated with wet-dry cycle. Wet-dry cycle, done by wetting the soil to the saturated conditions, and then the soil dried at a temperature of � 60 ° C. Once the soil reaches the dry conditions, then the soil is saturated again to form a cycle. The clay particles structure of the soil which have undergone treatment of wet-dry cycle, known by the scanning electron microscope (SEM) test. Then, for the strength parameters and the swell parameters of clay, obtained from the unconfined compression test and the one-dimensional swell test of ASTM. Clays in this study have high plasticity and can be categorized as expansive soil, as well as the most dominant mineral in the clay is montmorillonite. The composition of the clay particles with wet-dry cycle treatment, regularly shaped but not too dense. The strength of clays by wet-dry cycle treatment is higher ± 13 kPa than the strength of compacted clays, but the strength of clays and the treatment of wet-dry cycle can not be correlated. For the swelling potential and swelling pressures, the compacted clays give a greater value than the clay with wet-dry cycle treatment, the differences in value are ± 1,0 % at the swelling potential and ± 17,5 kPa at the swelling pressures. Keywords: clay, soil strength, soil swell, SEM