Study on uniaxial impact compressive characteristics of permeable asphalt concrete

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (4) : 195-199.

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Study on uniaxial impact compressive characteristics of permeable asphalt concrete

WU Jin-rong, MA Qin-yong

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Abstract

In order to investigate the dynamic characteristics of permeable asphalt concrete, 74mm steel Split Hopkinson pressure bar apparatus has been used to conduct uniaxial impact compressive test in various strain rates for permeable asphalt concrete with polyester fiber content of 0 and 0.3%. The research shows that there is a significant strain rate effect in permeable asphalt concrete and the specimen compression ratio grows with strain rate increasing. The specimen compression ratio of permeable asphalt concrete with polyester fiber is about 1.2 times as large as that without polyester fiber. Dynamic stress-strain curve of permeable asphalt concrete includes 3 stages, elastic deformation stage, plastic deformation stage and failure stage. From the failure mode of permeable asphalt concrete, it can be seen that the aggregate fracture is the main reason for permeable asphalt concrete failure. Polyester fiber in permeable asphalt concrete can delay cracks appearing and spreading and improve dynamic compressive strength. The largest strength increasing amplification can reach 45.1%.

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permeable asphalt concrete / SHPB / polyester fiber / strain rate / impact compressive strength

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WU Jin-rong;MA Qin-yong. Study on uniaxial impact compressive characteristics of permeable asphalt concrete [J]. Journal of Vibration and Shock, 2015, 34(4): 195-199