Electronic Theses and Dissertation

Berdasarkan data Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) tahun 2023 suhu rata-rata di Indonesia mengalami kenaikan dan oleh sebab itu kerusakan dini pada jalan beraspal umumnya akibat dari beban lalu lintas dan suhu di permukaan jalan. Pemanfaatan bahan aditif berupa limbah plastik High Density Polyethylene (HDPE) sebagai modifikasi aspal merupakan inovasi yang dilakukan untuk meningkatkan titik lembek aspal dan kualitas campuran. Penelitian ini bertujuan untuk mengetahui kadar aspal optimum dengan penggunaan metode yang berbeda dan kinerja campuran laston AC-WC dengan substitusi limbah HDPE sebagai bahan campuran aspal modifikasi serta reologi aspal. Tahap awal penelitian ini dengan melakukan pemeriksaan sifat-sifat fisis aspal, aspal modifikasi dan agregat, selanjutnya dilakukan pembuatan benda uji untuk penentuan kadar aspal optimum (KAO). Setelah nilai KAO didapatkan selanjutnya dilakukan pembuatan benda uji substitusi HDPE dengan variasi sebesar 9%, 10%, dan 11% yang diuji melalui tes Marshall. Dari hasil penelitian ini diperoleh KAO yaitu 5,91% untuk metode Departemen Pekerjaan Umum (2008) dan Asphalt Institute sebesar 5,72%. Evaluasi karakteristik Marshall pada campuran aspal beton AC-WC (Asphalt Concrete – Wearing Course) dengan variasi persentase HDPE 9%, 10%, dan 11% menunjukkan bahwa stabilitas tertinggi menurut metode Departemen Pekerjaan Umum (2008) dicapai pada substitusi HDPE 11% sebesar 2414,61 kg, sedangkan menurut metode Asphalt Institute, stabilitas tertinggi dicapai pada substitusi HDPE 9% sebesar 1746,52 kg. Substitusi HDPE meningkatkan density dan VFA(Void Filled by Asphalt), serta menurunkan VIM(Void in Mix), VMA(Void in Mineral Aggregate), dan flow. Metode Departemen Pekerjaan Umum (2008) menunjukkan substitusi HDPE 11% sebagai yang terbaik, sedangkan metode Asphalt Institute menunjukkan substitusi HDPE 9% sebagai yang terbaik, dengan durabilitas masing-masing 95,69% dan 91,81%.

Kata Kunci : Laston, Plastik High Density Polyethylene (HDPE), Departemen Pekerjaan Umum(2008), Asphalt Institute, Marshall

Based on data from the Meteorology, Climatology and Geophysics Agency (MCGA) in 2023 the average temperature in Indonesia has increased and therefore early damage to paved roads is generally the result of traffic loads and temperatures on the road surface. The utilization of additives in the form of High Density Polyethylene (HDPE) plastic waste as asphalt modification is an innovation made to increase the softening point of asphalt and mixture quality. This research aims to determine the optimum asphalt content by using different methods and the performance of AC-WC laston mixtures with HDPE waste substitution as a modified asphalt mixture material and asphalt rheology. The initial stage of this research is by examining the physical properties of asphalt, modified asphalt and aggregate, then making test objects to determine the optimum asphalt content (OAC). After the OAC value was obtained, the HDPE substitution test specimens with variations of 9%, 10%, and 11% were tested through the Marshall test. From the results of this study, OAC was obtained, namely 5.91% for the Department of Public Works (2008) method and the Asphalt Institute of 5.72%. Evaluation of Marshall characteristics of AC-WC (Asphalt Concrete - Wearing Course) asphalt concrete mixtures with variations in the percentage of HDPE 9%, 10%, and 11% showed that the highest stability according to the Department of Public Works (2008) method was achieved at 11% HDPE substitution of 2414.61 kg, while according to the Asphalt Institute method, the highest stability was achieved at 9% HDPE substitution of 1746.52 kg. HDPE substitution increases density and VFA (Void Filled by Asphalt), and decreases VIM (Void in Mix), VMA (Void in Mineral Aggregate), and flow. The Department of Public Works (2008) method showed 11% HDPE substitution as the best, while the Asphalt Institute method showed 9% HDPE substitution as the best, with durability of 95.69% and 91.81%, respectively. Keywords : Asphalt concrete layer, High Density Polyethylene (HDPE) Plastic, Department of Public Works (2008), Asphalt Institute, Marshall.