Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: MERT ATAKAN
Supervisor: KÜRŞAT YILDIZ
Open Archive Collection: AVESIS Open Access Collection
Abstract:Since the highway provides door-to-door transport, it is an irreplaceable transportation mode. Asphalt pavements are usually preferred in highway constructions. After a highway is opened to traffic, deteriorations occur in the course of time due to traffic loads, ageing and weather conditions in asphalt pavement. As a result of these deteriorations both costly maintenance necessity arises, and deteriorations put in danger the road safety. In order to solve this problem, self-healing of asphalt concrete was studied in this thesis. In the study, self-healing performance of cracks in asphalt concrete was examined via microwave heating method, by using fly ash as filler in asphalt concrete. For this purpose, at the first step microwave heating rates of fly ash and control specimens were determined by using thermal imaging camera. At the second step, specimens were damaged via three-point bending test and the damage which emerged in specimens were healed by microwave heating. Then, healing performance of healed specimens were determined by tested them again with three-point bending test. Crack size of the specimens were measured with the help of crack microscope before and after healing process. As a result, it was observed that initial damage size and microwave heating temperature are indicative factors for healing performance. It was observed that using fly ash as filler in asphalt concrete increased microwave heating rate and it was monitored that optimum healing temperature is between 75-100 °C. Although the effect of using fly ash to healing performance was limited, it is estimated that fly ash may improve healing performance in different loading case and different mixes.