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pp.1-9
Construction guidelines for porous asphalt have been revised to satisfy a porosity of at least 16% according to quality standards. Porous asphalt is widely used for pavements on highways and major urban roads, providing advantages such as improving drainage, preventing hydroplaning, and reducing road noise through a porous structure. It suppresses hydroplaning on the road surface, improves skid resistance during rainfall, shortens vehicle braking distance because rainwater does not accumulate, secures nighttime visibility, and prevents accidents. Porous asphalt reduces the noise surrounding a road to approximately 3–5 dB by absorbing the air vibration caused by the air compression of tires driving on the road with high porosity. For these reasons, it is applied to roads near residential areas and sound insulation sections in urban areas. However, porous asphalt is also accompanied by structural weaknesses. Owing to the characteristics of porous asphalt, the adhesion between aggregates is weakened due to the mixing characteristics of open-graded aggregate skeleton with low fine aggregate content, resulting in various problems such as a decrease in the stability of the mixture, binder draindown, cracks, raveling, and the decrease in durability due to moisture penetration. If the load in the pores is not dispersed or the binder flows downward, structural destruction is promoted, leading to a reduction ins long-term pavement life. Porous asphalt mixtures have large voids and weak interaggregate bonding strength, which reduces the stability of the mixture. Because the binder draindown and durability decreases owing to moisture penetration, reinforcement of the mixture is necessary to ensure long-term performance. Currently, most of the fibers used in porous asphalt are natural fibers, such as cellulose and synthetic fibers; however, there is a limit to securing the structural stability of the mixture within the pores. In this study, a new fiber was developed based on CALPET to compensate for the limitations of existing fiber reinforcements, and its applicability was reviewed by comparing and analyzing the physical characteristics of the porous asphalt mixture. The mixing of CALPET resulted in a 7% reduction in cantabro loss compared to cellulose fibers, and a statistically significant improvement in dynamic stability test results by inorganic components of CALPET.
1. 서론
1.1. 개요
1.2. 문헌조사
2. 실험방법
2.1. 실험에 사용한 재료
2.2. 배수성 아스팔트 배합설계 및 섬유 적용 방식
2.3. 배수성 아스팔트 배합설계
3. 결과 및 고찰
3.1. 섬유첨가제 종류 및 함량별 공극률 측정 결과
3.2. 섬유첨가제 종류 및 함량별 드레인다운 시험 결과
3.3. 섬유첨가제 종류 및 함량별 칸타브로 및 투수계수시험 결과
3.4. 섬유첨가제 종류 및 함량별 인장강도비(TSR)시험 결과
3.5. 섬유첨가제 종류 및 함량별 동적안정도 시험 결과
4. 결론
감사의 글
REFERENCES
