Pratelli Chiara, Betti Giacomo, Giuffrè Tullio, Marradi Alessandro
Civil and Industrial Engineering Department, University of Pisa, 56122 Pisa, Italy.
Faculty of Engineering and Architecture, University of Enna Kore, 94100 Enna, Italy.
Materials (Basel). 2018 Apr 16;11(4):611. doi: 10.3390/ma11040611.
In the last forty, years semi-flexible pavements have been successfully employed, especially in those areas subjected to heavy and slow-moving loads. They usually comprise a wearing course of Grouted Macadam, a composite pavement material that provides significant advantages in comparison to both concrete and asphalt pavements. On the other hand, the laying process of this material is a two-stage operation, and the realization complexity leads to long realization times and high initial costs. Therefore, the use of semi-flexible pavements has been limited to some fields of application and areas. Recently, an innovative material has been developed to be used as an alternative to Grouted Macadam for semi-flexible pavement wearing course realization. This material should provide similar or even superior characteristics compared to traditional Grouted Macadam. This will reduce semi-flexible pavement construction time and avoid the need for dividing the laying process. This paper presents an experimental program involving the use of FastFWD, as an APT device, to evaluate in-situ properties and performance of this material. The achieved results regarding the validation of this new material by means of FastFWD appear promising both in terms of the material's properties and resistance to dynamic load repetitions.
在过去的四十年里，半柔性路面已得到成功应用，尤其是在那些承受重型和慢速移动荷载的区域。它们通常包括一层灌浆碎石磨耗层，这是一种复合路面材料，与混凝土路面和沥青路面相比具有显著优势。另一方面，这种材料的铺设过程是一个两阶段操作，实现的复杂性导致实现时间长且初始成本高。因此，半柔性路面的使用仅限于某些应用领域和地区。最近，一种创新材料已被开发出来，用作半柔性路面磨耗层实现中灌浆碎石的替代品。这种材料应具有与传统灌浆碎石相似甚至更优的特性。这将减少半柔性路面的施工时间，并避免将铺设过程分开的需要。本文介绍了一个实验项目，该项目使用FastFWD作为一种先进的路面测试设备，来评估这种材料的现场特性和性能。通过FastFWD对这种新材料进行验证所取得的结果，在材料性能和抗动态荷载重复作用方面似乎都很有前景。
