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Open AccessArticle

Performance Evaluation of Recycled Asphalt Pavement Materials and Cold Recycling Mixtures Designed with Vibratory Compaction Method

1
School of Civil Engineering and Architecture, Chongqing Vocational Institute of Engineering, Chongqing 402260, China
2
School of Highway, Chang’an University, Xi’an 710001, Shaanxi, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(15), 3167; https://doi.org/10.3390/app9153167
Received: 3 July 2019 / Revised: 29 July 2019 / Accepted: 1 August 2019 / Published: 4 August 2019
(This article belongs to the Special Issue Sustainable Re-Utilization of Waste Materials)
In this paper, the basic composition and performance evaluation of the recycled asphalt pavement (RAP) materials were firstly analyzed, and two methods were proposed to evaluate strength characteristics of RAP materials, including a triaxial method for the residual strength and the mortar cementing method for the strength of RAP lump. Then, the cold recycling technology was applied on RAP materials with emulsified asphalt by using vibratory compaction and heavy-duty compaction methods (Proctor compaction method), and the results showed that the maximum dry density obtained by heavy-duty compaction was closer to the actual situation. Finally, the effects of wetting water, emulsified asphalt dosage and curing conditions on the performance of the specimens were investigated. It was found that when the emulsified asphalt was mixed uniformly, whether or not to add the wetting water have almost no effect on the strength of the molded specimens. When the matrix asphalt content of the emulsified asphalt was 30%~60%, the water could be directly added to the cold recycling mixture. The intensity of accelerated curing for two days at 40 °C was approximately equal to that of natural curing for three days, while that of accelerated curing for three days at 40 °C was approximately equal to that of natural curing for seven days, which provided a basis for the short-term laboratory test. View Full-Text
Keywords: RAP; material; performance; evaluation; strength; compaction RAP; material; performance; evaluation; strength; compaction
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MDPI and ACS Style

Pi, Y.; Li, Z.; Pi, Y.; Huang, Z.; Li, G. Performance Evaluation of Recycled Asphalt Pavement Materials and Cold Recycling Mixtures Designed with Vibratory Compaction Method. Appl. Sci. 2019, 9, 3167. https://doi.org/10.3390/app9153167

AMA Style

Pi Y, Li Z, Pi Y, Huang Z, Li G. Performance Evaluation of Recycled Asphalt Pavement Materials and Cold Recycling Mixtures Designed with Vibratory Compaction Method. Applied Sciences. 2019; 9(15):3167. https://doi.org/10.3390/app9153167

Chicago/Turabian Style

Pi, Yuhui; Li, Zhe; Pi, Yingxing; Huang, Zhe; Li, Guangcan. 2019. "Performance Evaluation of Recycled Asphalt Pavement Materials and Cold Recycling Mixtures Designed with Vibratory Compaction Method" Appl. Sci. 9, no. 15: 3167. https://doi.org/10.3390/app9153167

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