PURPOSES : The objective of this study is to evaluate the applicability of the pitch, which is produced during SDA petroleum upgrading process, as a pavement paving material. In order for the purpose, the physical and chemical properties of the pitch are analyzed, and then the various plasticizers are applied in the pitch. METHODS: Two types of pitch are selected from oil refinery companies, which are owned the SDA petroleum upgrading process. Also, two types of asphalt binders, PG 64-22 and PG 58-22, are employed to compare with the pitch because these two types of asphalt binders are currently used as paving materials. For the chemical property of the pitch, the composition of SARA (Saturate, Aromatic, Resin, Asphaltene), the elementary composition, and the functional group are analyzed. For the physical property of the pitch, the basic material property tests, such as penetration test, softening point test, flash point test, ductility test, and rotational viscometer test, are performed. Also, the DSR (Dynamic Shear Rheometer) test and the BBR (Bending Beam Rheometer) test are conducted using asphalt binder specimens obtained by both short term aging (Rolling Thin Film Oven, RTFO) and long term aging (Pressure Aging Vessel, PAV) processes. The rheological property of each pitch type is evaluated as a function of temperatures and loading cycles. PG 64-22 asphalt binder is used as a control material. RESULTS AND CONCLUSIONS: The Pitch may not be suitable for the pavement paving material without modifications, but the pitch can be used as alternatives of modified addictive or asphalt. If low molecular component, such as saturate and aromatic components, are added in the pitch based on the development of various plasticizers, it has a strong possibility for the pitch to be used as a alternative. However, in order to verify the performance property of the pitch, further research is needed.

현재 8천만 배럴/일 수준인 전세계의 원유 소비량은 2015년까지 매년 평균 1.7 % 정도의 증가율을 보이 면서 2020년경에는 1억 배럴/일에 도달할 것으로 예상되며, 지역별로 구분하면 아시와 지역의 소비 증가율 이 다른 지역을 크게 앞지르면서 2015년 쯤에는 전세계 원유 소비량의 30 % 정도를 아시아 지역에서 소비 할 것으로 전망되고 있다. 전세계적인 원유의 중질화 추세에 대비하여 선진국에서는 저가 중질유분을 저비 용/고효율의 환경친화적인 방식으로 경질화하여 다양한 용도로 효과적으로 활용하기 위한 새로운 경질화 기술을 활발히 개발중있으며, 국내에서도 정부의 적극적인 에너지 다변화 및 해외자원 확보 노력에 부응하 는 방안으로 일반 원유에 비하여 매장량이 훨씬 풍부한 초중질유 광구를 확보하고 이로부터 양질의 합성원 유와 고부가의 화학원료/재료를 생산하기 위한 새로운 개념의 차세대 경질화 공정에 대한 국내기술의 개발 을 진행하고 있다. 이와 같이 저가 중질유분의 고도 정제 과정에서 발생하는 이러한 경질화 부산물은 기존 의 역청 재료와 다른 화학적 성분과 함께 고점도의 물리적 특성 등으로 인해 작업성 및 시공성이 제한적이 라 건설재료로 활용하는데 어려움이 있다. 본 연구에서는 이런한 부산물을 건설재료로 활용하기 위한 연구 를 수행하였으며, 부산물의 기본적인 물리적 특성을 분석하였다

PURPOSES : The objective of this study is to evaluate the applicability of the pitch, which is produced during SDA petroleum upgrading process, as a pavement paving material. In order for the purpose, the physical and chemical properties of the pitch are analyzed, and then the various plasticizers are applied in the pitch. METHODS: Two types of pitch are selected from oil refinery companies, which are owned the SDA petroleum upgrading process. Also, two types of asphalt binders, PG 64-22 and PG 58-22, are employed to compare with the pitch because these two types of asphalt binders are currently used as paving materials. For the chemical property of the pitch, the composition of SARA (Saturate, Aromatic, Resin, Asphaltene), the elementary composition, and the functional group are analyzed. For the physical property of the pitch, the basic material property tests, such as penetration test, softening point test, flash point test, ductility test, and rotational viscometer test, are performed. Also, the DSR (Dynamic Shear Rheometer) test and the BBR (Bending Beam Rheometer) test are conducted using asphalt binder specimens obtained by both short term aging (Rolling Thin Film Oven, RTFO) and long term aging (Pressure Aging Vessel, PAV) processes. The rheological property of each pitch type is evaluated as a function of temperatures and loading cycles. PG 64-22 asphalt binder is used as a control material. RESULTS AND CONCLUSIONS: The Pitch may not be suitable for the pavement paving material without modifications, but the pitch can be used as alternatives of modified addictive or asphalt. If low molecular component, such as saturate and aromatic components, are added in the pitch based on the development of various plasticizers, it has a strong possibility for the pitch to be used as a alternative. However, in order to verify the performance property of the pitch, further research is needed.