Evaluation of Layered Inorganic Nano-powder Modified Bitumen  

作　　者：HAN J WU S P CHEN M Y YU M 

机构地区：[1]Key Laboratory of Silicate Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

出　　处：《武汉理工大学学报》2010年第17期51-54,共4页Journal of Wuhan University of Technology

基　　金：supported by the 2010 WHUT Ph.D.Candidate Intermational Academic Communication Preresearch Project(Pact No.2010-JL-02)

摘　　要：Thermal oxidative and aging as an inevitable process in the practical application of road asphalt has great effect on the properties of asphalt. In this paper,the influences of short-term thermal oxidative ageing and ultraviolet radiation(UV) aging on the dynamic viscosity,penetration,softening point and rheological properties of two kinds of layered inorganic nano-powder including organo-modified montmorillonite (OMMT) and nanometer brucite (Mg(OH)2) modified asphalts were studied respectively. The rheological properties of these binders have been determined using a dynamic shear rheometer (DSR) through temperatures sweep tests.The rheological and physical analysis showed the two major influences of ageing on the properties for two kinds of layered inorganic nano-powder modified bitumens. On one hand,ageing decreased the viscous behaviors of modified binders,on the other hand,ageing improved the elastic behaviors of modified binders. The performances of binders after aging depended on the combined effect between the modifier and the bitumen. Both the two modifiers resisted the aging of bitumens and the effect of OMMT was better.Thermal oxidative and aging as an inevitable process in the practical application of road asphalt has great effect on the properties of asphalt. In this paper,the influences of short-term thermal oxidative ageing and ultraviolet radiation（UV） aging on the dynamic viscosity,penetration,softening point and rheological properties of two kinds of layered inorganic nano-powder including organo-modified montmorillonite （OMMT） and nanometer brucite （Mg（OH）2） modified asphalts were studied respectively. The rheological properties of these binders have been determined using a dynamic shear rheometer （DSR） through temperatures sweep tests.The rheological and physical analysis showed the two major influences of ageing on the properties for two kinds of layered inorganic nano-powder modified bitumens. On one hand,ageing decreased the viscous behaviors of modified binders,on the other hand,ageing improved the elastic behaviors of modified binders. The performances of binders after aging depended on the combined effect between the modifier and the bitumen. Both the two modifiers resisted the aging of bitumens and the effect of OMMT was better.

关 键 词：ageing evaluation layered inorganic nano-powder modified bitumen 

分 类 号：TU535[建筑科学—建筑技术科学]