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Yan Juansyah
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Analisa Karakteristik Tanah Timbunan Ditinjau dari Hubungan Gradasi Butiran Tanah dengan Nilai CBR Rendaman dan Tanpa Rendaman Yan Juansyah
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 20, No 1 (2016): Edisi April 2016
Publisher : UNIVERSITAS LAMPUNG

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Abstract

The California bearing ratio (CBR) is a penetration test for evaluation of the mechanical strength of natural soil, subgrades and basecourses carriageway construction. The basic site test is per- formed by measuring the pressure required to penetrate soil or aggregate with a standard area. The measured pressure is then divided by the pressure required to achieve an equal penetration on a standard crushed rock material. The CBR test is described in ASTM Standards D1883-05 (for laboratory-prepared samples). CBR-value is used as an index of soil strength and bearing capac- ity. This value is broadly used and applied in design of the base and the sub-base material for pavement. CBR-test was conducted to characterize the strength and the bearing capacity of the nine studied soils from with nine place diference. experiments conducted in the laboratory of soil mechanics Malahayati university. The soil test done is physical, standard proctor and CBR Unsoaked. CBR value obtained was 9.33 % minimum value and a maximum value of 19%. CBR- values need to be interpreted in the context of the general relationship between the CBR values and the gradation of the soils. It can used in pavement or road and other applications.
Pengaruh Fraksi Pasir Dalam Campuran Tanah Lempung Terhadap Nilai CBR dan Indeks Plastisitas Untuk Meningkatkan Daya Dukung Tanah Dasar Lusmeilia Afriani; Yan Juansyah
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 20, No 1 (2016): Edisi April 2016
Publisher : UNIVERSITAS LAMPUNG

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Abstract

CBR-value is used as an index of soil strength and bearing capacity. This value is broadly used and applied in design of the base and the sub-base material for pavement. Sand –stabilized soils are often used for the construction of these pavement layers and also for embankments. CBR-value is a familiar indicator test used to evaluate the strength of soils for these applications. CBR-test was conducted to characterize the strength and the bearing capacity of the studied soils and their mixtures with sand. CBR-values of the diference soils, compacted at optimum water content, Atterbeg limit are given in this report. All the specimens were prepared using a standard proctor test. The results of the research will be made in the form of a graph on the relationship between the value of CBR to the liquid limit., LL, maximum dry density. The results also will display the graphic relationship between the plasticity index with content of sand fraction and clay fraction. The test results show that the Atterberg limits that a percentage of the original soil and addition of sand. ff (loose soil). The results showed that Relationships LL CBR value and the fraction of sand fraction that the lower the value of LL will increase the value CBRnya. The results showed that the content of the sand can increase the value CBRn. CBR value is highest at 71.11% sand content.
Co-Authors Lusmeilia Afriani