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    Investigation of the Shear Behavior between Layers of Foamed Asphalt Cold-Recycled Pavement

    Source: Journal of Materials in Civil Engineering:;2021:;Volume ( 033 ):;issue: 004::page 04021050-1
    Author:
    Lei Fan
    ,
    Junyan Yi
    ,
    Yan Feng
    ,
    Decheng Feng
    DOI: 10.1061/(ASCE)MT.1943-5533.0003659
    Publisher: ASCE
    Abstract: Foamed asphalt cold-recycled mixtures have been increasingly used in China. However, the interlayer shear performance between the foamed asphalt cold-recycled layer and its top and bottom layers is still not clear. In this study, we explored factors affecting the interlayer shear performance of foamed asphalt cold-recycled layers (FACRL). Regarding the interlayer performance between the foamed asphalt cold-recycled layer and cement-treated base (CTB), the optimal content of the prime coat asphalt was 0.8  kg/m2, and the prime coat asphalt was recommended to be applied on the surface of the base as soon as the base was paved. Styrene-butadiene-styrene (SBS)-rubber modified asphalt with a content of 2.3  kg/m2 and aggregates with a size range of 4.74–9.5  mm was recommended for use in the seal coats. The aggregates used in the seal coat were recommended to be premixed with a 0.3% asphalt binder to improve the adhesion and to be paved with a spreading area of 65%. Regarding the interlayer performance between the foamed asphalt cold-recycled layer and top hot-mix asphalt (HMA), the interlayer shear strength and fracture energy increased and then decreased with the added tack coat asphalt. The shear strength and fracture energy of the interlayer at 50°C was only 20% and 8% of that at 25°C, respectively. The optimum usage percent of the tack coat binder is 0.4  kg/m2.
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      Investigation of the Shear Behavior between Layers of Foamed Asphalt Cold-Recycled Pavement

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4269967
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    • Journal of Materials in Civil Engineering

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    contributor authorLei Fan
    contributor authorJunyan Yi
    contributor authorYan Feng
    contributor authorDecheng Feng
    date accessioned2022-01-31T23:34:21Z
    date available2022-01-31T23:34:21Z
    date issued4/1/2021
    identifier other%28ASCE%29MT.1943-5533.0003659.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4269967
    description abstractFoamed asphalt cold-recycled mixtures have been increasingly used in China. However, the interlayer shear performance between the foamed asphalt cold-recycled layer and its top and bottom layers is still not clear. In this study, we explored factors affecting the interlayer shear performance of foamed asphalt cold-recycled layers (FACRL). Regarding the interlayer performance between the foamed asphalt cold-recycled layer and cement-treated base (CTB), the optimal content of the prime coat asphalt was 0.8  kg/m2, and the prime coat asphalt was recommended to be applied on the surface of the base as soon as the base was paved. Styrene-butadiene-styrene (SBS)-rubber modified asphalt with a content of 2.3  kg/m2 and aggregates with a size range of 4.74–9.5  mm was recommended for use in the seal coats. The aggregates used in the seal coat were recommended to be premixed with a 0.3% asphalt binder to improve the adhesion and to be paved with a spreading area of 65%. Regarding the interlayer performance between the foamed asphalt cold-recycled layer and top hot-mix asphalt (HMA), the interlayer shear strength and fracture energy increased and then decreased with the added tack coat asphalt. The shear strength and fracture energy of the interlayer at 50°C was only 20% and 8% of that at 25°C, respectively. The optimum usage percent of the tack coat binder is 0.4  kg/m2.
    publisherASCE
    titleInvestigation of the Shear Behavior between Layers of Foamed Asphalt Cold-Recycled Pavement
    typeJournal Paper
    journal volume33
    journal issue4
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0003659
    journal fristpage04021050-1
    journal lastpage04021050-13
    page13
    treeJournal of Materials in Civil Engineering:;2021:;Volume ( 033 ):;issue: 004
    contenttypeFulltext
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