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Research on the Application of Emulsion Asphalt Semi-Rigid Materials in the Road Pavement Structure

Author: WangNing
Tutor: YangXiWu；XiaoWen
School: Chongqing Jiaotong University
Course: Traffic and Transportation Engineering
Keywords: emulsified asphalt semi-rigid materials unconfined compression strength coefficient of drying shrinkage coefficient of temperature shrinkage comprehensive economic benefit
CLC: U414
Type: Master's thesis
Year: 2008
Downloads: 30
Quote: 0
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Abstract


Based on series of indoor tests including unconfined compression test,indirect stretching test, water stability test, freezing stability and abrasion test, the paper discusses the mechanical performance of the semi-rigid base materials mixed with different content of emulsified asphalt of which the shrinkage properties are alse researsed.After adding the emulsified asphalt to the fly-ash cement stabilized soil and the cement stabilized soil, their unconfined compressive strength and indirect tensile strength has reduced, but it still meets the regulatory requirements. When the emulsified asphalt is between 2% and 4%, the emulsified asphalt-cement powder-fly-ash stabilized powder meets the technical and regulatory requirements of highways and first-level roads’base. The case is the same, when the emulsified asphalt is 2%. Meanwhile, the compressive resilient modulus of both the fly-ash cement stabilized soil and the cement stabilized soil is smaller than that of the semi-rigid material of the same age period.The water stability and freezing stability of Fly-ash cement stabilized soil are better than that of cement stabilized soil by adding emulsified asphalt.When the content is 2%,the freezing resistance and abrasive resistance are the optimum.Emulsified asphalt can reduce the deformation of drying shrinkage and temperature shrinkage effectively.Coefficient of shrinkage of emulsified asphalt treated Fly-ash cement stabilized soil and emulsified asphalt treated cement stabilized soil is less than that of emulsified asphalt treated lime stabilized soil obviously. In the same way,the former two materials have the similar rule between its drying shrinkage and temperature shrinkage.The economic analysis indicates that the semi-rigid base mixed with emulsified asphalt has a eximious social benefit and economic benefit. Especially in the areas which are lack of high-quality granules,it is very economic and reasonable to make use of the semi-rigid base mixed with emulsified asphalt. So it may popularize.

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CLC: > Transportation > Road transport > Road works > Road construction materials
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