高寒地区水泥稳定碎石基层性能研究进展

Research progress on properties of cement-stabilized macadam base in alpine regions

由于具有弹性模量高、稳定性好、强度高等优点,水泥稳定碎石基层被广泛应用于高等級路西工程中,但在高寒地区低温环境下,水泥稳定碎石基层易出现开裂、冻胀等问题,对其性能造成严重影响。基于此,本文从开裂机理、抗裂性能影响因素、冻融损伤机理、抗冻性能影响因素及防治措施等角度入手,对水泥稳定碎石基层性能进行综合评价,并提出目前研究存在的不足及下一步研究重点,以期为高寒地区水泥稳定碎石基层应用与推广捉供有益参考。

Due to the advantages of high elastic modulus,good stability and high strength,cement-stabilized macadam base has been widely used in high grade pavement engineering.However,in the low temperature environment of alpine regions,cement-stabilized macadam base is prone to cracking,frost heaving and other problems,which have a serious impact on its performance.Based on this,in this paper,the crack mechanism,the influence factors of crack resistance,the freeze-thaw damage mechanism,the influence factors of frost resistance and the prevention and treatment measures were discussed.The application status of cement-stabilized macadam base was evaluated and the shortcomings of current research were putted forward,in order to provide useful reference for the research and application of cement-stabilized macadam base in alpine area.