PURPOSES: The objective of this study is to determine the milling temperature that minimizes the binder-induced damage to the aggregate; this is achieved by evaluating the temperature dependence of the viscosity of the asphalt binder, with the aim of developing an effective heating process for warm in-place recycling. METHODS : The validity of the indoor test was confirmed by conducting an internal heating test based on the on-site heating test. In addition, the adhesive power of the binder was measured at various temperatures (30℃, 40℃, 50℃, 60℃, 70℃) via three types of measuring methods. RESULTS: The surface temperature spectrum of field test was slight different with that of laboratory test. But, the spectra of inner temperature between the field and the laboratory was almost similar. Also, the adhesion of the asphalt binder was measured from 30℃ to 70℃. The adhesion of the binder was significantly decreased from 60℃. Contrary to other temperature, the adhesion was slightly changed from 60℃ to 70℃. Also the inner temperature between two different heating methods was shown similar temperature spectra. CONCLUSIONS: The pavement heating temperature spectrum of hot in place recycling method was simulated by a laboratory test. Based on this study, the optimum temperature was 60℃~70℃ for reducing aggregate damage during milling process. The susceptibility heating method developed in this study can be maintained the optimum inner temperature range.

현장가열재생공법은 이미 미국과 캐나다와 같은 선진국에서 아스팔트도로의 친환경 유지보수공법으로 서 적용되고 있는 공법이다. 이 공법은 아스팔트를 현장에서 100% 재활용함으로써 하나의 공정으로 작업 이 완료되어 경제적으로나 친환경적으로 큰 관심을 받는 공법이다. 하지만 국내에서는 장비의 큰 규모와 아스팔트 표면의 가열로 인한 다량의 유증기 발생 및 가열장비의 온도 불 균일로 인한 도로포장의 품질저 하 문제와 장비의 노후화로 사용성이 떨어지고 있다. 본 연구에서는 현장가열중온재생공법 장비개발에 필 요한 히팅 시스템을 개발하기 위해 다양한 가열 방식을 변수로 하여 아스팔트 시편의 외부 및 내부온도 스펙트럼을 측정하여 분석해 보고자 한다.