Electronic Theses and Dissertation

Jalan sebagai prasarana transportasi darat diharapkan mampu untuk memberi kenyamanan dan keamanan bagi pengguna jalan. Namun, beberapa ruas jalan di kawasan pantai barat Provinsi Aceh mengalami permasalahan kerusakan jalan. Air laut menjadi salah satu penyebabnya, salah satu upaya yang dapat dilakukan untuk menanggulangi permasalahan tersebut yaitu dengan meningkatkan mutu campuran aspal dengan melakukan modifikasi. Modifikasi dapat dilakukan dengan menggunakan suatu bahan tambah, diantaranya yaitu limbah plastik berjenis Low Density Polyethylene (LDPE) yang dijadikan pensubstitusi pada aspal AC – WC. Adapun penelitian ini bertujuan untuk mengetahui karakteristik Marshall dan durabilitas pada campuran laston lapis aus (AC – WC) dengan penambahan limbah LDPE 3%, 6%, dan 9% yang disertai variasi durasi rendaman air laut selama 30 menit, 24 jam, dan 48 jam. Metode yang digunakan dalam penelitian ini adalah kajian eksperimental yang dilakukan di Laboratorium Jalan Raya, Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala selama bulan Juli - November 2021 yang dimulai dengan uji sifat fisis material, analisa saringan, mix design, pembuatan benda uji sebanyak 87 buah, serta uji Marshall dan durabilitas. Durabilitas suatu campuran aspal dapat dilihat dari nilai IRS (Index Retained Stability). Dari hasil penelitian didapatkan nilai stabilitas substitusi limbah LDPE terbaik yaitu pada substitusi 6% dengan perendaman air biasa selama 30 menit 1335,17 kg; perendaman 24 jam 1292,28 kg; dan perendaman 48 jam 1226,73 kg yang memiliki nilai IRS 96,79% pada perendaman 24 jam dan 91,88% pada perendaman 48 jam. Pada perendaman air laut selama 30 menit 1185,66 kg; perendaman 24 jam 1091,78 kg; dan perendaman 48 jam 1068,72 kg yang memiliki nilai IRS 92,08% pada perendaman 24 jam dan 90,14% pada perendaman 48 jam. Hasil tersebut memenuhi Spesifikasi Umum Bina Marga 2018 Revisi 2 (2020) yaitu ≥ 90%, sehingga dapat disimpulkan bahwa substitusi limbah LDPE dapat mengurangi kerusakan aspal akibat air laut.

Kata kunci : Low Density Polyethylene (LDPE), Air Laut, Laston Lapis Aus (AC – WC), Karakteristik Marshall dan Durabilitas.

Roads as land transportation infrastructure are expected to be able to provide comfort and safety for road users. However, several roads in the west coast of Aceh Province are experiencing road damage problems. Seawater is one of the causes, one of the efforts that can be made to overcome these problems is to improve the quality of the asphalt mixture by making modifications. Modifications can be made by using an added material, including plastic waste of the type Low Density Polyethylene (LDPE) which is used as a substitute for AC - WC asphalt. The purpose of this study was to determine the Marshall characteristics and durability of a mixture asphalt concrete wearing course (AC – WC) with the addition of 3%, 6%, and 9% LDPE waste accompanied by variations in the duration of seawater immersion for 30 minutes, 24 hours, and 48 hours. The method used in this research is an experimental study conducted at the Highway Laboratory, Department of Civil Engineering, Faculty of Engineering, Syiah Kuala University during July - November 2021 which begins with testing the physical properties of the material, sieve analysis, mix design, making as 87 pieces of test objects, as well as Marshall test and durability. The durability of an asphalt mixture can be seen from the IRS (Retained Stability Index) value. From the results of the research, it was found that the stability value of the best LDPE waste substitution was at the substitution of 6% with plain water immersion for 30 minutes 1335,17 kg; immersion for 24 hours 1292,28 kg; and immersion for 48 hours 1226,73 kg which has an IRS value of 96,79% at 24-hours immersion and 91,88% at 48-hours immersion. In seawater immersion for 30 minutes 1185,66 kg; immersion for 24 hours 1091,78 kg; and immersion for 48 hours 1068,72 kg which has an IRS value of 92,08% at 24-hours immersion and 90,14% at 48-hours immersion. These results meet the General Specifications of Bina Marga 2018 Revision 2 (2020) which is ≥ 90%, so it can be concluded that the substitution of LDPE waste can reduce asphalt damage due to seawater. Keywords : Low Density Polyethylene (LDPE), Seawater, Asphalt Concrete Wearing Course (AC – WC), Marshall Characteristics and Durability.