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Preparation and Properties of TLA Modified Asphalt

Author: ZhangHengLong
Tutor: YuJianYing
School: Wuhan University of Technology
Course: Materials Science
Keywords: Trinidad Lake Asphalt Asphalt Rheological properties Aging properties An atomic force microscope
CLC: U414
Type: Master's thesis
Year: 2010
Downloads: 152
Quote: 4
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Abstract


Asphalt' dissertation">Trinidad Lake Asphalt (TLA) modified asphalt with its good road performance at home and abroad have been widely used in airport runways, bridge deck pavement, highway. TLA modified asphalt, however, mainly focused on the physical properties of the pitch and the Mixture Performance For less TLA modified asphalt rheological properties and the aging performance. In addition, the modification mechanism TLA modified asphalt is rarely involved. In this paper, the TLA matrix asphalt (TZ-70 and SK-90) of the different types of physical properties, rheological properties and aging properties, and the use of Fourier transform infrared spectroscopy (FT-IR) and atomic force microscopy (AFM) TLA modified asphalt mechanism. The results show that: the TLA could increase the softening point of the two substrates, increasing its viscosity, reduce the ductility and penetration. TLA modified softening point and viscosity increment of TZ-70 was significantly higher than SK-90, and increases as the content increased of TLA. Compared with SK-90, TLA and TZ-70 asphalt better compatibility. This indicates that the TLA TZ-70 performance improvement is more apparent, and both showed good compatibility. TLA significant effect on the rheological properties of the asphalt. Add TLA asphalt complex modulus increases, the phase angle decreases, asphalt rutting factor increases accordingly. Studies have shown that for every 10% increase in TLA dosage, modified bitumen can improve a PG high temperature grade significantly improved high temperature stability and resistance to rutting of the asphalt. TLA also significantly improve the role of the aging properties of asphalt. Compared to the base asphalt, TLA modified bitumen film oven aging, the the pressure aging tank aging and a significant decrease in the ratio and the change in viscosity index of a softening point after UV aging, residue penetrometry significantly increased ratio of TLA can effectively improve aging asphalt heat oxygen and ultraviolet aging properties. Infrared spectroscopy studies have shown that the: TLA added to asphalt does not produce new absorption peak, TLA physical modification of asphalt. The atomic force microscope (AFM) observation: compared to the base asphalt, TLA modified asphalt topography is more smooth, \Since the asphalt \systems. In addition, AFM also reflect the dispersed phase showed obvious Guo.Association TLA modified asphalt, so that the rigidity of the system is improved, a significant increase in the softening point and viscosity of the modified asphalt.

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