Irawati, Ludfi Djakfa, Muhammad Zainul Arifin, Akhmad Sabarudin, Ilanka Cahya Dewi, Irawan Palgunadi
This study examines the effect of a hydrated lime additive on steel slag stone mastic asphalt for induction heating and induced healing appli cations. It evaluates the self-healing capabilities of hydrated lime-modified steel slag stone mas tic asphalt under tropical conditions. The three-point bending was first tested on the steel slag-stone mastic asphalt mixture mod ified with hydrated lime (1 %, 2 %, 3 %, and 4 % by mix weight). The mix's fracture, displace ment, cracking resistance, and flexibility index are evaluated. Subsequently, the fracture, dis placement, cracking resistance, flexibility index recovery, and healing ratio for damage-heal ing were investigated. The research employs induction heating, which regulates temperature according to natural tropical conditions. The healing process is compared between heating in a tropical environment and heating with addi tional temperature. The results demonstrated that adding hydrated lime to steel slag stone mastic asphalt increased fracture strength, however, this improvement was accompanied by decreased displacement, cracking resistance, and flexibil ity. The findings indicate that the healing ratio of steel slag stone mastic asphalt is enhanced by 1 % hydrated lime. Adding 1 % hydrated lime is optimal for improving fracture strength and healing ratio. The fracture strength increased by 5 % with a 1 % variation of hydrated lime. The healing ratio of the 1 % hydrated lime-mod ified stone mastic asphalt increased by 14.57 % under natural conditions compared to 0 % hydrated lime steel slag stone mastic asphalt. Furthermore, the healing ratio of steel slag mas tic asphalt with 1 % hydrated lime subjected to artificial heating increased by 22.08 % compared to stone mastic asphalt with 0 % hydrated lime under natural heating. © 2025 Authors.
Department of Civil Engineering, Universitas Muhammadiyah, Jember Karimata str., 49, East Java, Jember, 68121, Indonesia; Department of Civil Engineering, Universitas Brawijaya, Veteran str., 10-11, East Java, Malang, 65145, Indonesia; Department of Civil Engineering, Universitas Brawijaya, Veteran str., 10-11, East Java, Malang, 65145, Indonesia; Department of Civil Engineering, Universitas Brawijaya, Veteran str., 10-11, East Java, Malang, 65145, Indonesia; Research & Development, Krakatau Steel Indonesia Company, Industri str., 5, West Java, Cilegon Banten, 42435, Indonesia
