The interface between asphalt binder and mineral aggregate directly affects the service life of pavement because the defects and stress concentration occur more easily there. The interaction between asphalt binder and...The interface between asphalt binder and mineral aggregate directly affects the service life of pavement because the defects and stress concentration occur more easily there. The interaction between asphalt binder and mineral aggregate is the main cause of forming the interface. This paper presents an extensive review on the test technologies and analysis methods of interfacial interaction, including molecular dynamics simulation, phase field approach, absorption tests, rheological methods and macro mechanical tests. All of the studies conducted on this topic clearly indicated that the interfacial interaction between asphalt binder and mineral aggregate is a physical-chemical process, and can be qualitatively characterized by microscopical technique （such as SEM and AFM）, and also can be quantitatively evaluated by rheological methods and interfacial mechanical tests. Molecular dynamics simulation and phase field approach were also demonstrated to be effective methods to study the interfacial behavior and its mechanism.展开更多
文摘The interface between asphalt binder and mineral aggregate directly affects the service life of pavement because the defects and stress concentration occur more easily there. The interaction between asphalt binder and mineral aggregate is the main cause of forming the interface. This paper presents an extensive review on the test technologies and analysis methods of interfacial interaction, including molecular dynamics simulation, phase field approach, absorption tests, rheological methods and macro mechanical tests. All of the studies conducted on this topic clearly indicated that the interfacial interaction between asphalt binder and mineral aggregate is a physical-chemical process, and can be qualitatively characterized by microscopical technique （such as SEM and AFM）, and also can be quantitatively evaluated by rheological methods and interfacial mechanical tests. Molecular dynamics simulation and phase field approach were also demonstrated to be effective methods to study the interfacial behavior and its mechanism.
文摘以环渤海湾海洋工程混凝土结构耐久性作为研究对象,根据多年来积累的实验室、海洋暴露站和工程实测数据,采用ChaDuraLife V1.0混凝土结构寿命预测模型与计算机软件,分析不同矿物掺合料掺量、水胶比对海洋混凝土结构服役寿命的影响规律.结果表明:降低水胶比,提高粉煤灰掺量和磨细矿渣掺量都能有效延长海洋混凝土结构的预期服役寿命.以环渤海湾海洋浪溅区混凝土结构为例,最长服役寿命所对应的海洋混凝土配合比最优参数是:粉煤灰和磨细矿渣掺量分别为20%、40%,水胶比为0.30,混凝土结构满足100、200、500 a寿命所需最小保护层厚度分别为60、75、120 mm.
