Putri, Divia Rahma (2026) Studi Eksperimental Perbaikan Sifat Fisis dan Mekanis Tanah Lempung Lunak Menggunakan Serbuk Cangkang Bekicot dan Bakteri Bacillus Subtilis (Lokasi Studi: Desa Ploso, Kecamatan Wonoayu, Kabupaten Sidoarjo). (Experimental Study on the Improvement of Physical and Mechanical Properties of Soft Clay Soil Using Giant African Snail Shell Powder and *Bacillus subtilis* Bacteria (Study Location: Ploso Village, Wonoayu District, Sidoarjo Regency)). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.
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Abstract
The rapid development of construction in Sidoarjo Regency following the Lapindo mudflow disaster has led to increased land requirements in new development areas, including Wonoayu District. However, the soil at the study site is classified as clay with high plasticity and low bearing capacity, requiring improvement before being used as a construction base. This study aims to analyze the effect of adding snail shell powder and Bacillus subtilis bacteria on the physical and mechanical properties of soft clay soil in Ploso Village, Wonoayu District, Sidoarjo Regency. The research was conducted experimentally with variations of snail shell powder of 5%, 10%, and 15%, Bacillus subtilis bacteria of 6%, and curing time of 0, 7, and 14 days. The results showed that the addition of snail shell powder and Bacillus subtilis bacteria was able to improve the physical and mechanical properties of clay soil. The optimum variation was obtained in a mixture of 15% snail shell powder and 6% Bacillus subtilis bacteria with curing for 7 days, which resulted in a water content of 15.73%, Specific Gravity of 2.639, Liquid Limit of 18.40%, Plasticity Index of 5.68%, Shrinkage Limit of 14.67%, maximum dry unit weight (γd max) of 1.536 gr/cm³, and UCS value of 0.53108 kg/cm². Based on the research results, using snail shell powder and Bacillus subtilis bacteria is effective in improving the quality of clay soil in Wonoayu District, Sidoarjo.
| Item Type: | Thesis (Undergraduate) |
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| Uncontrolled Keywords: | Bacillus subtilis, biogrouting, serbuk cangkang bekicot, stabilisasi tanah, tanah lempung, UCS. |
| Subjects: | Q Science > Q Science (General) Q Science > QR Microbiology T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction T Technology > TP Chemical technology |
| Divisions: | Fakultas Teknik > Program Studi Teknik Sipil |
| Depositing User: | 1432200113 Divia Rahma Putri |
| Date Deposited: | 18 Aug 2026 07:13 |
| Last Modified: | 18 Aug 2026 07:13 |
| URI: | http://repository.untag-sby.ac.id/id/eprint/47391 |
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