A Nanoindentation Study on the Rheological Behaviour of Bituminous Binders

作     者：LIU G VAN DE VEN M WU S P YU J Y MOLENAAR A 

作者机构：Faculty of Civil Engineering and GeosciencesDelft University of TechnologyP.O. Box 50482600 GA Delftthe Netherlands Key Laboratory of Silicate Materials Science and Engineering of Ministry of EducationWuhan University of TechnologyWuhan 430070China 

出 版 物：《武汉理工大学学报》 (Journal of Wuhan University of Technology)

年 卷 期：2010年第32卷第17期

页      面：47-50页

学科分类：0810[工学-信息与通信工程] 08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主　　题：nanoindentation bitumen viscoelasticity creep 

摘      要：This paper reports the nanoindentation results of three bituminous binders,C-Fix,and standard penetration grade 40/60 bitumen and organo-montmorillonite (OMt) modified bitumen. Under a load applied by the Berkovich diamond indenter,a loading and unloading history was recorded and the load-displacement curve was analyzed as a function of time. The software can directly give an output value of the modulus for C-Fix. However the result was dependent on the loading history. Due to increasing viscoelastic behaviour,the output value of the modulus for base bitumen was always negative,even with a very short unloading time. In conclusion,the modulus calculated by the software was not suitable for the bituminous binders due to their time-dependence. The nanoindentation curve during the loading phase of bitumen could be described by the adopted creep model. The results indicated that the OMt modified bitumen showed a high creep resistance than the base bitumen due to the OMt s reinforcement.