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Estimation Model of Asphalt Content for SAMPAVE Stress Absorbing Layer Mixture

Author: TongQin
Tutor: ChenHuaZuo
School: Chang'an University
Course: Road and Railway Engineering
Keywords: Stress-absorbing layer Asphalt content Prediction model Fractal Theory The specific surface area Asphalt film thickness
CLC: U414
Type: Master's thesis
Year: 2011
Downloads: 44
Quote: 0
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Abstract


Triggered to prevent or delay the Old Cement Pavement asphalt surface , new pavement semi- rigid base or rigid base temperature shrinkage , shrinkage cracks due to late the road early reflections cracks , the research group developed SAMPAVE stress -absorbing layer. The functional layer is formulated into a special modified asphalt and the specific mineral aggregate level , the asphalt content of up to 9% , the formation of the Rich asphalt sand - asphalt mixture . The SAMPAVE stress -absorbing layer mix design method is different from other types of mixes , Marshall law and Superpave method to mix design there are some defects , Mixture Design Method for SAMPAVE stress -absorbing layer is required to get rid of the traditional thinking , another way to reasonably determine the asphalt content of its large scale applications is of great significance . The paper compares the fractal theory , factor method specific surface area , surface area index , methods of isolation membrane four specific surface area theory method is characterized by the establishment of a model based the fractal theory SAMPAVE stress absorption layer mixes specific surface area . And comparison of the three measured than the surface area ( nitrogen adsorption method , particle size analysis , Bertrand breathable law ) , found that the nitrogen adsorption test mineral aggregate is more appropriate to the specific surface area , and fractal theory model calculated and measured values ??is closer to . And analysis of film thickness of asphalt mixture performance , comprehensive stress-absorbing layer of a mixture of various performance indicators , determine a reasonable three-dimensional stress-absorbing layer mixes film thickness of 12 to 13 μm . By determining the total surface area of mineral admixture , consider the optimum asphalt film thickness effective asphalt content and mineral aggregate amount of absorbed asphalt mix asphalt content estimates derived SAMPAVE stress-absorbing layer . The proposed model of the Green blue high-speed and high-speed paved Wuhuang stress absorption layer sections of engineering data checking , and found that the prediction model with better reliability and applicability .

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