泡沫沥青冷再生基层路面结构力学性能分析

Analysis of Mechanical Performance of Cold Recycled Pavement with Foamed Asphalt

摘要:

通过ANSYS有限元法对泡沫沥青再生混合料用于不同路面结构的力学特性进行对比分析，得知泡沫沥青再生基层在不同路面结构组合下、在不同养生过程中的应力应变都有所不同.研究得出：泡沫沥青再生基层厚度不宜小于15 cm；泡沫沥青再生路面随着时间的推移，路面强度将不断增强；采用复合基层（柔性材料加半刚性材料）能明显增强路面的承载能力.

关键词:泡沫沥青; 冷再生; 有限元; 力学性能

Abstract:

Based on a comparative study and an anlysis of the mechanical performance of the foamed asphalt recycled mixture for different road structures with ANSYS finiteelement method, a conclusion is drawn that the stress and strain of the foamed asphalt recycled base are different under different road combinations at different curing periods. Results show that the thickness of the foamed asphalt recycled base should not be less than 15 cm;the foamed asphalt pavement is strengthening with time.Composite base (Flexible materials + Semirigid materials) can increase the carrying capacity of the road significantly. The conclusion of the paper contributes a great to the guiding structure design of foamed asphalt recycled pavement.

Key words:foamed asphalt; cold recycling; finite element; mechanical performance