Electronic Theses and Dissertation

Pembangunan infrastruktur jalan memiliki peran penting dalam mendukung pertumbuhan ekonomi, sosial, dan mobilitas masyarakat. Kualitas jalan sangat dipengaruhi oleh kekuatan lapisan perkerasan, khususnya subbase course yang berfungsi menyebarkan beban lalu lintas ke subgrade, meningkatkan stabilitas, serta memperpanjang umur rencana jalan. Pemilihan material yang sesuai standar pada subbase course menjadi faktor utama dalam menjamin ketahanan konstruksi jalan. Oleh karena itu, evaluasi teknis melalui pengujian laboratorium menjadi hal yang penting sebelum material diterapkan di lapangan. Penelitian ini bertujuan untuk menganalisis karakteristik sifat fisis dan mekanis material timbunan pilihan serta mengevaluasi kelayakan material sebagai subbase course pada pekerjaan Pemeliharaan Berkala Ruas Jalan Lingkar Kota Sigli. Sampel material berasal dari Stone Crusher PT. Putra Muda Mandiri Group yang berlokasi di Desa Keude Paru, Kecamatan Bandar Baru, Kabupaten Pidie Jaya, dan diuji di Laboratorium Bidang Pengujian dan Peralatan Dinas PUPR Aceh. Data yang digunakan terdiri dari data primer dan data sekunder. Data primer diperoleh dari pengujian laboratorium meliputi analisis saringan agregat, berat jenis agregat, berat isi agregat, pemadatan dengan metode Modified Proctor, serta uji CBR unsoaked sebagai parameter utama. Data sekunder berupa standar SNI dan ASTM, dokumen Dinas PUPR Aceh, dan literatur akademik digunakan untuk mendukung analisis dan perbandingan. Hasil penelitian menunjukkan bahwa material timbunan memiliki distribusi butiran yang sesuai dengan klasifikasi AASHTO A-1-a, kadar butiran halus rendah, serta berat jenis agregat dan berat isi agregat yang memenuhi persyaratan teknis. Material timbunan memiliki daya dukung tinggi berdasarkan hasil pengujian CBR unsoaked, yaitu sebesar 85,75% pada kadar air 6%, jauh di atas nilai minimum 20% yang disyaratkan untuk subbase course. Berdasarkan hasil penelitian, dapat disimpulkan bahwa material timbunan dari Stone Crusher PT. Putra Muda Mandiri Group memiliki karakteristik sifat fisis dan mekanis yang memenuhi persyaratan sehingga layak digunakan sebagai subbase course dan dapat dijadikan acuan dalam perencanaan serta pemeliharaan jalan di wilayah terkait.

Road infrastructure development has an important role in supporting economic, social, and community mobility growth. The quality of the road is greatly influenced by the strength of the pavement layer, especially the subbase course which functions to spread the traffic load to the subgrade, increase stability, and extend the life of the road plan. The selection of materials that meet the standards on the subbase course is the main factor in ensuring the durability of road construction. Therefore, technical evaluation through laboratory testing is important before the material is applied in the field. This study aims to analyze the characteristics of the physical and mechanical properties of selected landfill materials and evaluate the feasibility of materials as a subbase course in the Periodic Maintenance of the Sigli City Ring Road Section. The material sample comes from Stone Crusher PT. Putra Muda Mandiri Group is located in Keude Lung Village, Bandar Baru District, Pidie Jaya Regency, and tested at the Laboratory for Testing and Equipment of the Aceh PUPR Office. The data used consists of primary data and secondary data. Primary data were obtained from laboratory testing including aggregate sieve analysis, aggregate specific gravity, aggregate content weight, compaction by the Modified Proctor method, and unsoaked CBR test as the main parameters. Secondary data in the form of SNI and ASTM standards, documents from the Aceh PUPR Office, and academic literature are used to support analysis and comparison. The results showed that the backfill material had a granular distribution that was in accordance with the AASHTO A-1-a classification, a low fine grain content, as well as the specific gravity of the aggregate and the weight of the aggregate contents that met the technical requirements. The backfill material has a high carrying capacity based on the results of the unsoaked CBR test, which is 85.75% at a moisture content of 6%, far above the minimum value of 20% required for the subbase course. Based on the results of the research, it can be concluded that the backfill material from PT. Putra Muda Mandiri Group has physical and mechanical characteristics that meet the requirements so that it is suitable for use as a subbase course and can be used as a reference in road planning and maintenance in related areas.