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厂拌热再生沥青混合料在含LSPM路面结构中的应用及评价
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Application and Evaluation of Asphalt Mixture by Central Plant Hot Recycling in Pavement Structure with LSPM
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    摘要:

    首先对回收沥青路面材料(RAP)进行了检测,进而设计了厂拌热再生沥青混合料AC-20与AC-25的配合比.其次,利用压力机和MTS-810测定了其不同RAP掺配比例下15 ℃和20 ℃抗压强度和抗压回弹模量,分析了变化规律并推荐取值范围.最后,针对含LSPM厂拌热再生加铺沥青路面与含LSPM厂拌热再生永久性路面,进行了结构分析与评价,论证了厂拌热再生沥青混合料作为面层结构层应用于含LSPM路面结构在技术上的可行性.研究表明,对于含LSPM厂拌热再生加铺沥青路面,设计时有必要实测厂拌热再生沥青混合料的抗压回弹模量,并验算该结构层底弯拉应力是否满足规范要求;将厂拌热再生沥青混合料应用于含LSPM的永久性路面能满足设计控制指标.

    Abstract:

    Firstly, the reclaimed asphalt pavement was detected, and further mixing proportion of asphalt mixture AC-20/AC-25 by central plant hot recycling was designed. Secondly, the compressive strength and the compressive resilience modulus of the mixture with different RAP percentages were tested with pressure machine and MTS-810 respectively at 15 and 20℃. Next, the change laws were analyzed and the value ranges were recommended. Finally, structural analysis and evaluation were carried out for overlaid asphalt pavement and perpetual pavement by central plant hot recycling with LSPM so as to demonstrate the technical feasibility of the mixture used as structural layer of surface course in pavement structure with LSPM. The studies have suggested that, for overlaid asphalt pavement by central plant hot recycling with LSPM, the compressive resilience modulus of the recycled mixture needs testing in design and the tensile stress at the bottom of recycled structural layer needs checking according to specifications. Moreover, the application of recycled mixture in perpetual pavement with LSPM can satisfy the design control indexes.

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薛彦卿, 黄晓明.厂拌热再生沥青混合料在含LSPM路面结构中的应用及评价[J].湖南大学学报:自然科学版,2011,38(10):26~33

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