Electronic Theses and Dissertation

Pembangunan jalan di Indonesia memerlukan material perkerasan yang tidak hanya berkualitas tinggi, tetapi juga berkelanjutan dan ramah lingkungan. Di tengah keterbatasan sumber daya agregat alam, pemanfaatan limbah industri seperti kerak boiler dari cangkang kelapa sawit menjadi alternatif yang inovatif dan potensial. Kerak boiler memiliki sifat keras dan kaku yang sesuai untuk digunakan sebagai substitusi agregat halus dalam campuran aspal beton. Penelitian ini bertujuan untuk mengevaluasi pengaruh penggunaan kerak boiler sebagai pengganti sebagian agregat halus serta pemanfaatan aspal polimer Performance Grade (PG) 70 terhadap kinerja campuran AC-BC. Pengujian dilakukan di laboratorium melalui metode Marshall dengan variasi substitusi kerak boiler sebesar 0%, 25%, 50%, 75%, dan 100%, serta penentuan kadar aspal optimum (KAO). Analisis statistik dilakukan menggunakan Response Surface Methodology (RSM) dan ANOVA. Hasil menunjukkan bahwa substitusi 25% kerak boiler dengan aspal PG-70 memberikan kinerja terbaik, dengan stabilitas maksimum 2204,75 kg pada kadar aspal 5,47% dan flow 4,37 mm. Formulasi optimal ditemukan pada kadar aspal 6,37% dengan stabilitas 2050,76 kg dan flow 3,07 mm. Nilai durabilitas mencapai 90,49%, yang memenuhi standar minimal 90% sesuai Spesifikasi Bina Marga 2018 Revisi 2 (2020). Penelitian ini membuktikan bahwa limbah industri seperti kerak boiler dapat dimanfaatkan secara efektif dalam teknologi perkerasan jalan sebagai solusi inovatif yang mendukung keberlanjutan.

Road construction in Indonesia requires pavement materials that are not only high quality, but also sustainable and environmentally friendly. Amidst limited natural aggregate resources, the use of industrial waste such as boiler slag from palm kernel shells is an innovative and promising alternative. Boiler slag has hard and rigid properties that are suitable for use as a substitute for fine aggregate in asphalt concrete mixtures. This study aims to evaluate the effect of using boiler slag as a partial replacement for fine aggregate and the use of Performance Grade (PG) 70 polymer asphalt on the performance of AC-BC mixtures. Tests were conducted in the laboratory using the Marshall method with variations in boiler slag substitution of 0%, 25%, 50%, 75%, and 100%, as well as determining the optimum asphalt content (OAC). Statistical analysis was performed using Response Surface Methodology (RSM) and ANOVA. The results showed that a 25% substitution of boiler slag with PG-70 asphalt provided the best performance, with maximum stability of 2204.75 kg at an asphalt content of 5.47% and flow of 4.37 mm. The optimal formulation was found at an asphalt content of 6.37% with stability of 2050.76 kg and flow of 3.07 mm. The durability value reached 90.49%, meeting the minimum standard of 90% according to the 2018 Revised 2 (2020) Road Construction Specifications. This study demonstrates that industrial waste such as boiler slag can be effectively utilized in road pavement technology as an innovative solution supporting sustainability.