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All Journal Irfani Journal of Innovation and Technology
Nashiruddin
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Evaluation of Swelling – Shrinkage of Soil Stabilized with Cement and Spent Bleaching Earth Nashiruddin
Jurnal Inovasi Teknologi Vol 5 No 1 (2024): April
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

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Abstract

This research aims to investigate the effect of using Spent Bleaching Earth (SBE) as a soil stabilizer in cement-stabilized soil. The study employs a 5% Portland Composite Cement (PCC) ratio based on the dry soil weight, with SBE as a stabilizing agent at ratios of 5%, 10%, 15%, and 20% of the Portland Composite Cement weight. Curing periods of 0 days, 7 days, and 14 days are used, with a focus on the expansion and shrinkage characteristics. The best results were obtained in a mixture with a 10% SBE variation as a soil stabilizer, under a 14-day curing period, with a plasticity index of 14.149%, Expansion (CBR Soaked) of 1.178, Expansion Pressure of 1,706 kg/cm2, and free expansion index of 13.333%. Test results indicate that mixtures with various amounts of SBE as a soil stabilizer in cement-treated soil and different curing periods can reduce soil expansion, as evidenced by decreasing values of plasticity index, Expansion (CBR Soaked), expansion pressure, and free expansion index. Therefore, it can be concluded that SBE as a soil stabilizer, along with prolonged curing, can reduce the soil's expansion and shrinkage characteristics.
PERAN KEPEMIMPINAN TRANSFORMASIONAL DIGITAL KEPALA SEKOLAH DALAM MENCIPTAKAN BUDAYA INOVASI PENDIDIKAN ERA 4.0 Dudun Ubaedullah; Nashiruddin; Rokimin; Taufik
Irfani Vol. 21 No. 3 (2025): Irfani (e-Journal)
Publisher : LP2M IAIN Sultan Amai Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30603/irfani.v21i3.6836

Abstract

This study aims to explore the role of school principals in integrating technology into teaching and learning, the challenges encountered in the process, and the competencies required for principals to lead digital transformation. A qualitative method with a case study approach was employed in several schools in Indonesia. Data were collected through in-depth interviews with principals, teachers, and students, as well as document analysis related to school technology policies. The findings indicate that principals with a clear vision and adequate technological competence are able to foster the successful integration of technology in instruction. Key challenges include teachers’ resistance to change, limited resources and infrastructure, and the lack of ongoing professional development for teachers. Principals who address these barriers by providing sufficient support, continuous training, and cultivating a culture of innovation can accelerate schools’ digital transformation. Moreover, principals’ technological competencies play an important role in motivating and facilitating teachers to integrate technology. The study offers recommendations for principals to adopt transformational leadership and to place greater emphasis on teacher professional development and the enhancement of technological infrastructure. It is hoped that this research provides insights for education policymakers and school leaders to strengthen technology implementation in schools.
Co-Authors Dudun Ubaedullah Rokimin Taufik