Electronic Theses and Dissertation

Jalan Raya merupakan salah satu infastruktur yang berfungsi sebagai sarana distribusi barang maupun jasa. Penambahan karet remah (crumb rubber) kedalam campuran aspal bisa meningkatkan elastisitas, ketahanan terhadap deformasi permanen dan stabilitas campuran, sehingga mampu memperpanjang umur layanan perkerasan. Penggunaan abu sekam padi dalam modifikasi aspal memberikan efek positif terhadap peningkatan kualitas campuran. Tujuan penelitian adalah menganalisis kinerja aspal modifikasi pada karet remah (crumb rubber) dan abu sekam padi pada campuran AC-WC terhadap karakteristik marshall serta menentukan komposisi terbaik yang memenuhi Spesifikasi Umum Bina Marga 2018 Revisi 2 (2020). Tahap awal penelitian adalah menentukan kadar aspal optimum (KAO) yang diperoleh dalam rentang 5,03%, 5,37%, dan 5,71%. Seluruh nilai KAO tersebut digunakan dalam pengujian dengan variasi kadar crumb rubber sebesar 3%, 5%, 7%, dan 9%. Hasil pengujian marshall menunjukkan bahwa pada kombinasi kadar 5,71% dengan substitusi karet remah 9% memberikan hasil terbaik. Selanjutnya crumb rubber terbaik di uji dengan abu sekam padi sebesar 3%, 5%, 7%, dan 9% terhadap karakteristik Marshall, dan diperoleh hasil terbaiknya 5% abu sekam padi. Seluruh parameter Marshall memenuhi Spesifikasi Umum Bina Marga 2018 Revisi 2 (2020). Hasil uji durabilitas menunjukkan nilai Index of Retained Strength (IRS) sebesar 92,57% telah memenuhi syarat AASHTO (≥75%) dan Bina Marga (≥90%).

Highways are a key infrastructure component that serves as a means of distributing goods and services. The addition of crumb rubber to asphalt mixtures can improve elasticity, resistance to permanent deformation, and mixture stability, thereby extending the service life of the pavement. The use of rice husk ash in asphalt modification has a positive effect on improving mixture quality. The objective of this study is to analyze the performance of asphalt modified with crumb rubber and rice husk ash in AC-WC mixtures regarding Marshall characteristics and to determine the optimal composition that meets the 2018 General Specifications for Road Construction, Revision 2 (2020). The initial stage of the study was to determine the Optimum Asphalt Content (OAC), which was obtained within the range of 5.03%, 5.37%, and 5.71%. All OAC values were used in testing with variations in crumb rubber content of 3%, 5%, 7%, and 9%. Marshall test results indicate that the combination of a 5.71% content with 9% crumb rubber substitution yields the best results. Subsequently, the optimal crumb rubber was tested with rice husk ash at levels of 3%, 5%, 7%, and 9% regarding Marshall characteristics, with the best result obtained at 5% rice husk ash. All Marshall parameters met the 2018 General Specifications of the Ministry of Public Works and Public Housing, Revision 2 (2020). Durability test results showed an Index of Retained Strength (IRS) value of 92.57%, which met the requirements of AASHTO (≥75%) and the Ministry of Public Works and Public Housing (≥90%).