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All Journal J-Sil (Jurnal Teknik Sipil dan Lingkungan) Journal Industrial Servicess Journal of the Civil Engineering Forum Civil Engineering Dimension Publikasi Riset Orientasi Teknik Sipil (Proteksi) J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Tri Sudibyo
Institut Pertanian Bogor
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Journal : Civil Engineering Dimension

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Improving Shear Strength Parameters of Sandy Soil using Enzyme-Mediated Calcite Precipitation Technique Heriansyah Putra; Hideaki Yasuhara; Naoki Kinoshita; Erizal .; Tri Sudibyo
Civil Engineering Dimension Vol. 20 No. 2 (2018): SEPTEMBER 2018
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.18 KB) | DOI: 10.9744/ced.20.2.91-95

Abstract

Several methods have been established for their various potential applications as soil improvement technique, and recently the application of grouting technique using biological process have been proposed. This study discussed the applicability of enzyme-mediated calcite precipitation (EMCP) in improving the shear strength parameters of sandy soil.  In this study, soil specimens were prepared and treated with the grouting solutions composed of urea, calcium chloride, magnesium sulfate and enzyme of urease. Evolutions in the cohesion and internal friction angle of the improved soil were examined through the direct shear tests. The presence of the precipitated materials, comprising 4.1 percent of the soil mass of the treated sand, generated a cohesion of 53 kPa. However, contrary to the improvement of cohesion, the friction angle is relatively constant. It indicated that the application of the EMCP technique has no significant impact on the friction angle
Improvement of Shear Strength of Clay Shale Soil using Polymer-Calcite Precipitation (PCP) as Soil Stabilization Technique Ramadhan, Fathur; Fauzan, Muhammad; Putra, Heriansyah; Sudibyo, Tri
Civil Engineering Dimension Vol. 27 No. 2 (2025): SEPTEMBER 2025
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.27.2.214-222

Abstract

Clay shale is an expansive soil owing to its shrinkage and expansion, leading to geotechnical issues, such as loss of strength. This study explored the effectiveness of the Polymer–Calcite Precipitation (PCP) method in improving clay shale's shear strength. This study evaluated the optimum Polyvinyl Alcohol (PVA) concentration for enhancing the shear strength and identifying the residual shear strength of the treated soil. Various tests were conducted to determine the soil properties and assess soil improvement using direct shear tests. The results indicate that adding PVA increases the cohesion value of saturated clay shale and maintains its residual strength close to its peak strength value, with the optimum concentration of 4% PVA boosting cohesion from 4.47 kPa to 32.83 kPa. In conclusion, the PCP method effectively enhances the shear strength of clay shale and offers a potential solution for soil stabilization.
Co-Authors Ahmad Fatoni Apriadi, Apriadi Apriliyanto, Rangga Ardiansyah, Rahmat Chusnul Arif Dhia Kamal Irfan Dwi Bangkit Prakoso Dzaky Syifaurrahman Erizal , Erizal . Erizal Erizal Fitri Rohmah Widayanti Hideaki Yasuhara Imam Muthohar Irfan, Dhia Kamal Khuswatun Chasanah Khuswatun Chasanah, Khuswatun Listiana, Novi Mentari, Sekar Muhamad Adlijil Ikram Muhammad fauzan Muhammad Fauzan Naoki Kinoshita Nidea Novitasari Novi Listiana Novitasari, Nidea Prakoso, Dwi Bangkit Purnama, Satya Adi Purwo Mahardi Putra, Heriansyah Rahmat Ardiansyah Ramadhan, Fathur Ramadhanis, Zainab Rangga Apriliyanto Rantelino, Owen Satya Adi Purnama Simanjorang, Bernando Agung Saputra Sutoyo Sutoyo Sutoyo Sutoyo Suwarto, Fardzanela Syifaurrahman, Dzaky Vincent Vincent, Vincent