Tauste-Martínez Raul, Hidalgo Ana Elena, García-Travé Gema, Moreno-Navarro Fernando, Rubio-Gámez María Del Carmen
E.T.S. de Ingeniería de Caminos, Canales y Puertos, University of Granada, C/Severo Ochoa S/N, 18071 Granada, Spain.
Laboratorio Nacional de Materiales y Modelos Estructurales (LANAMME), University of Costa Rica, San Jose 2060, Costa Rica.
Materials (Basel). 2022 May 5;15(9):3307. doi: 10.3390/ma15093307.
This article presents a new methodology of analysis based on a fast-running experimental procedure to characterise the mechanical response of asphalt mortars in terms of stiffness, ductility, and fatigue resistance. This was achieved using the DMA (Dynamic Mechanical Analyser) three-point bending configuration. The study was carried out by considering the employment of different types of fillers such cement and CaCO and different types of binders such as conventional asphalt binder (B35/50) or modifided polymer-modified bitumen (PMB 25/55-65). From the results of this study, the filler was found to have a greater influence on the stiffness and ductility of the asphalt material, while bitumen had a higher effect on the fatigue life of the asphalt mortar. Fatigue life was observed to increase with the use of a polymer-modified binder, while a lower degree of permanent deformation and higher bearing capacity achieved by the use of cement instead of calcium carbonate as active fillers.
本文提出了一种基于快速运行实验程序的新分析方法，以从刚度、延性和抗疲劳性方面表征沥青胶浆的力学响应。这是通过动态热机械分析仪（DMA）的三点弯曲配置实现的。该研究考虑了使用不同类型的填料（如水泥和碳酸钙）以及不同类型的粘结剂（如传统沥青粘结剂（B35/50）或改性聚合物改性沥青（PMB 25/55-65））来进行。从该研究结果发现，填料对沥青材料的刚度和延性影响更大，而沥青对沥青胶浆的疲劳寿命影响更大。观察到使用聚合物改性粘结剂时疲劳寿命会增加，而使用水泥代替碳酸钙作为活性填料可实现更低程度的永久变形和更高的承载能力。
