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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
최준성 (인덕대학교 토목환경공학과)
저널정보
한국도로학회 한국도로학회논문집 한국도로학회논문집 제20권 제1호
발행연도
2018.1
수록면
69 - 76 (8page)

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초록· 키워드

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PURPOSES : This study determined the optimal usage rate of RAP (reclaimed asphalt pavement) using cold central-plant recycling (CCPR) on a road-surface layer. In addition, a mixture-aggregate gradation design and a curing method based on the proposed rate for the surface-layer mix design were proposed. METHODS : First, current research trends were investigated by analyzing the optimum moisture content, mix design, and quality standards for surface layers in Korea and abroad. To analyze the aggregate characteristics of the RAP, its aggregate-size characteristics were analyzed through the combustion asphalt content test and the aggregate sieve analysis test. Moreover, aggregate-segregation experiments were performed to examine the possibility of RAP aggregate segregation from field compaction and vehicle traffic. After confirming the RAP quality standards, coarse aggregate and fine aggregate, aggregate-gradation design and quality tests were conducted for mixtures with 40% and 50% RAP usage. The optimum moisture content of the surface-layer mixture containing RAP was tested, as was the evapotranspiration effect on the surface-layer mixture of the optimum moisture content. RESULTS : After analyzing the RAP recycled aggregate size and extraction aggregate size, 13-8mm aggregate was found to be mostly 8mm aggregate after combustion. After using surface-chipping and mixing methods to examine the possibility of RAP aggregate segregation, it was found that the mixing method contributed very little for 3.32%, and because the surface-chipping method applied compaction energy directly as the maximum assumption the separation ratio was 15.46%. However, the composite aggregate gradation did not change. Using a 40% RAP aggregate rate on the surface-layer mixture for cold central-plant recycling satisfied the Abroad quality standard. The optimum moisture content of the surface-layer mixture was found to be 7.9% using the modified Marshall compaction test. It was found that the mixture was over 90% cured after curing at $60^{\circ}C$ for two days. CONCLUSIONS : To use the cold central-plant recycling mixture on a road-surface layer, a mixture-aggregate gradation design was proposed as the RAP recycled aggregate size without considering aggregate segregation, and the RAP optimal usage rate was 40%. In addition, the modified Marshall compaction test was used to determine the optimum moisture content as a mix-design parameter, and the curing method was adapted using the method recommended by Asphalt Recycling & Reclaiming Association (ARRA).
#Cold central-plant recycling #CCPR) #Reclaimed asphalt pavement #RAP) #possibility of aggregate segregation #optimal RAP usage rate #mix design parameter

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참고문헌 (12)

참고문헌 신청
Alex, K. A. / 2013 / Evaluation of Cold In-Place and Cold Central-Plant Recycling Methods using Laboratory Testing of Field-Cored Specimens / J. of Mater. Civ. Engrg. ASCE 25(11):1712~1720 Crossref Asphalt Institute (AI) / 2001 / Asphalt Cold Mix Manual, Manual Series No. 14 (MS-14) google schola Asphalt Recycling. / 2015 / Basic Asphalt Recycling Manual, Chapter.11 google schola 최준성 / 2017 / 무시멘트 상온 재활용 아스팔트 기층의 현장 적용성을 통한 양생기간에 관한 연구 / 한국도로학회논문집 19(2):67~74 dbpia Choi, J. S. / 2017 / The Base Study on the Cold Mix Design of Surface Course using Reclaimed Asphalt Pavement :48~48 google schola

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