Electronic Theses and Dissertation

Pemanfaatan limbah plastik polypropylene sebagai alternatif dalam konstruksi jalan merupakan salah satu upaya untuk mengurangi pencemaran lingkungan sekaligus meningkatkan kinerja perkerasan jalan. limbah polypropylene yang digunakan dalam penelitian ini berupa wadah makanan jenis thinwall. penelitian ini bertujuan untuk menganalisis pengaruh penambahan polypropylene terhadap karakteristik campuran laston lapis aus berdasarkan parameter marshall serta menentukan kadar polypropylene yang menghasilkan kinerja campuran terbaik. penentuan kadar aspal optimum (kao) dilakukan dengan metode overlapping dan diperoleh nilai sebesar 5,4%. variasi kadar polypropylene yang digunakan adalah 6%, 9%, 12%, 15%, dan 18% terhadap berat aspal. proses pencampuran dilakukan dengan metode basah (wet process), yaitu melelehkan polypropylene bersama aspal hingga homogen sebelum dicampur dengan agregat. pengujian marshall dilakukan untuk memperoleh parameter stabilitas, flow, density, vim, vma, vfb, dan mq. hasil pengujian sifat fisis aspal modifikasi menunjukkan bahwa nilai titik lembek meningkat pada seluruh variasi, dengan nilai tertinggi mencapai 100°c pada kadar pp 15% dan 18%, sedangkan berat jenis cenderung menurun. parameter penetrasi tidak memenuhi spesifikasi pada seluruh variasi, dengan nilai terendah 0, sementara daktilitas hanya memenuhi pada kadar pp 6% sebesar 74,3 cm. pada pengujian marshall, beberapa parameter belum memenuhi spesifikasi bina marga 2020, yaitu vim pada kadar pp 15% serta flow pada kadar pp 6% dan 9%. namun, parameter kepadatan, vma, vfb, stabilitas, dan mq memenuhi spesifikasi pada seluruh variasi. nilai stabilitas meningkat hingga mencapai 2255 kg pada kadar pp 15%, sedangkan nilai mq tertinggi sebesar 655,950 kg/mm diperoleh pada kadar pp 12%. secara umum, peningkatan kadar polypropylene menyebabkan perubahan parameter marshall yang fluktuatif. berdasarkan keseluruhan parameter, kadar pp 12% menghasilkan kinerja campuran paling optimal karena seluruh parameter memenuhi spesifikasi bina marga 2020.

The utilization of polypropylene (PP) plastic waste as an alternative material in road construction is one of the efforts to reduce environmental pollution while improving pavement performance. The polypropylene waste used in this study was in the form of thinwall food containers. This research aims to analyze the effect of polypropylene addition on the characteristics of asphalt concrete wearing course (AC-WC) mixtures based on Marshall parameters and to determine the optimum polypropylene content that produces the best mixture performance. The optimum asphalt content (OAC) was determined using the overlapping method, resulting in a value of 5.4%. The variation of polypropylene content used was 6%, 9%, 12%, 15%, and 18% by weight of asphalt. The mixing process was carried out using the wet process method, in which polypropylene was melted together with asphalt until homogeneous before being mixed with aggregates. Marshall testing was conducted to obtain parameters including stability, flow, density, VIM, VMA, VFB, and MQ. The results of the physical properties test of modified asphalt showed that the softening point increased for all variations, with the highest value reaching 100°C at 15% and 18% PP content, while the specific gravity tended to decrease. The penetration parameter did not meet the specifications for all variations, with the lowest value reaching 0, whereas ductility only met the specification at 6% PP with a value of 74.3 cm. In the Marshall test, several parameters did not meet the 2020 Bina Marga Specifications, namely VIM at 15% PP and flow at 6% and 9% PP. However, density, VMA, VFB, stability, and MQ met the specifications for all variations. Stability increased with higher polypropylene content, reaching a maximum value of 2255 kg at 15% PP, while the highest Marshall Quotient (MQ) value of 655.950 kg/mm was obtained at 12% PP. In general, increasing polypropylene content caused fluctuating changes in Marshall parameters. Based on the overall evaluation, the addition of 12% polypropylene at 5.4% asphalt content produced the most optimal mixture performance, as all parameters satisfied the 2020 Bina Marga Specifications.