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Study on the Applicability of Fiber Micro-Surfacing in Gansu Region

Author: LiSuXian
Tutor: ZhengNanXiang
School: Chang'an University
Course: Materials Science
Keywords: Asphalt pavement Modified asphalt emulsion Fiber micro-surfacing Road performance
CLC: U414
Type: Master's thesis
Year: 2009
Downloads: 128
Quote: 1
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Abstract


In recent years, Gansu Province by the massive new highway construction phase to both conservation and construction stages , Gansu Province highway maintenance department has been seeking an economical and fast way to completely change the pavement maintenance excavation filled past behind conservation methods , micro-surfacing technology as one of the important technical preventive maintenance , repair roads is considered to be the current pavement rutting and many other diseases the most effective and most economical means of , especially for road maintenance funding constraints , Gansu Province , highway conservation of line length , decentralized status quo. In order to improve the durability of micro-surfacing to improve its workability and road performance , making it better for preventive maintenance, Based Gansu region's climate , the material is mainly research in micro- surfacing mixture by adding fiber, Tour Add fiber micro-surfacing performance improvement results. This paper studied the modified asphalt emulsion preparation process , the effects of different emulsifiers and different asphalt modified asphalt emulsion prepared by comparing the performance ; followed by studies of fiber micro-surfacing material selection and technical requirements, micro-surfacing mix design method , the main effects of adding fiber micro-surfacing performance. By mixing test, cohesive force test , wet wheel abrasion test , the load wheel testing, analysis results fibers added to make the mixture to increase the cohesion , viscosity increase , and the fiber mixture in improving the adhesion, anti- grindability areas have a significant improvement ; Meanwhile, the addition of fiber also increase the flexibility of the mix , and can significantly improve the micro-surfacing resistance to deformation , anti- fatigue life. This paper presents the aggregate ratio and fiber dosage of the best recipes . Finally, the fiber micro-surfacing construction steps and construction quality control, and analysis of the fiber micro-surfacing economic and social benefits . This thesis , promoting the new technology in Gansu Province trunk road maintenance in the promotion and application maintenance for saving money, reducing road maintenance speed and improve the efficiency of road maintenance is important .

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