Jurnal Graha Nusantara

PEMANFAATAN LIMBAH PLASTIK POLIPROPILENA SEBAGAI BAHAN MODIFIKASI ASPAL DALAM MENINGKATKAN KETAHANAN PERKERASAN JALAN

2026-07-15T14:32:01+00:00

The increasing volume of polypropylene (PP) plastic waste in Indonesia, unmatched by adequate recycling systems, combined with premature asphalt pavement damage caused by traffic loads and tropical climate conditions, motivated this study to examine the effect of waste PP as an asphalt modifier on pavement durability. This study employed a quantitative experimental approach using the wet-process method, in which waste PP was blended into 60/70 penetration-grade asphalt at contents ranging from 0% to 10% by weight of asphalt, followed by Marshall testing, wheel tracking testing, and immersion testing. The results showed that PP addition significantly increased Marshall stability up to an optimum content of 6% (from 850 kg to 1,250 kg), increased dynamic stability by up to 93% at 8% content, and increased the Residual Strength Index to 92% at 6% content. Beyond these levels, mixture performance declined due to reduced compatibility and increased air voids. This study concludes that waste PP has strong potential as an effective asphalt modifier for enhancing pavement durability while simultaneously offering a sustainable plastic waste management solution, with an optimum content recommended within the range of 5-7% by weight of asphalt.

Peran Kepemimpinan Dalam Meningkatkan Disiplin Kehadiran Pegawai pada Kantor Camat Padangsidimpuan Utara Kota Padangsidimpuan

2026-07-15T14:40:46+00:00

Penelitian ini bertujuan untuk menganalisis peran kepemimpinan dalam meningkatkan disiplin kehadiran pegawai di Kantor Camat Padangsidimpuan Utara Kota Padangsidimpuan. Fokus penelitian diarahkan pada bentuk-bentuk kepemimpinan yang diterapkan pimpinan, kontribusinya terhadap perilaku disiplin pegawai, serta strategi yang dapat dilakukan untuk memperkuat kedisiplinan aparatur. Penelitian menggunakan pendekatan kualitatif dengan metode deskriptif-analitis. Informan penelitian dipilih secara purposive yang terdiri atas Camat Padangsidimpuan Utara, kepala bidang, staf kepegawaian, dan pegawai pelaksana dengan jumlah keseluruhan sepuluh orang. Pengumpulan data dilakukan melalui wawancara mendalam, observasi partisipatif, dan studi dokumentasi. Analisis data menggunakan model interaktif Miles, Huberman, dan Saldaña yang meliputi pengumpulan data, kondensasi data, penyajian data, serta penarikan kesimpulan. Hasil penelitian menunjukkan bahwa kepemimpinan memiliki pengaruh yang besar terhadap pembentukan disiplin kehadiran pegawai. Peran pemimpin tampak melalui keteladanan dalam mematuhi jam kerja, pengawasan yang konsisten, komunikasi yang terbuka, pemberian motivasi, serta penerapan sanksi dan penghargaan secara proporsional. Disiplin kehadiran pegawai mengalami peningkatan ketika pimpinan aktif melakukan pengawasan langsung dan membangun hubungan kerja yang komunikatif dengan bawahan. Kendala yang masih ditemukan antara lain kurang konsistennya sebagian pegawai dalam menaati aturan serta belum optimalnya sistem pengawasan berbasis teknologi. Penelitian ini menyimpulkan bahwa kepemimpinan yang tegas, komunikatif, dan memberi contoh positif dapat mendorong terciptanya budaya disiplin kerja yang lebih baik di lingkungan organisasi pemerintah daerah.

Peran Pasar Tradisional dalam Menjaga Ketahanan Pangan Masyarakat di Tengah Inflasi

2026-07-23T22:06:56+00:00

Inflation has led to rising food prices, reducing purchasing power and threatening food security, particularly among low- and middle-income households. This study aims to analyze the role of the Poken Jongjong Traditional Market in maintaining community food security amid inflation. A qualitative research approach was employed using observation, in-depth interviews, and documentation as data collection techniques. The collected data were analyzed through data reduction, data display, and conclusion drawing. The findings indicate that the Poken Jongjong Traditional Market plays a significant role in sustaining food security by providing relatively affordable food prices, implementing flexible bargaining mechanisms, and maintaining a shorter distribution chain. Furthermore, the strong social ties between traders and consumers foster mutual trust and social solidarity, enabling communities to better cope with economic pressures during inflation. Therefore, local governments are encouraged to strengthen and revitalize traditional markets as a strategic policy to enhance food security and improve community economic resilience during periods of inflation.