摘要
以季冻区道路的半刚性基层为背景，对石灰稳定土和二灰稳定土的最佳干密度、无侧限抗压强度和冻胀量进行了研究。经过试验得出季冻区石灰稳定土基层中石灰剂量为14％～16％时强度相对较大，是抑制冻胀发育的最佳石灰剂量；影响二灰土强度的首要因素是二灰用量，季冻区二灰稳定土基层的合理二灰含量约为30％，二灰比1：2（石灰：粉煤灰：土=10：20：70）为季冻区二灰土最佳配合比，该配合比强度大，抑制冻胀发育效果较好。
Based on semi-rigid base in seasonal frozen roads, this paper carries out research on the optimum dry density, unconfined compressive strength and frost heave of lime stabilized soil and lime-flyash stabilized soil. It gets the result that lime stabilized soil base will have a stronger strength with lime content of 14% - 16% in seasonal frozen region, which is the optimum lime proportion to restrain the development of frost heaving. The primary factor that influences the strength of lime-flyash soil is the proportion of lime-flyash. The reasonable lime-flyash content in lime-flyash stabilized soil base is about 30% in seasonal frozen region; lime- flyash ratio of 1 ： 2 （lime ： flyash ： soil = 10 ： 20 ： 70） is the optimum mixing proportion for lime-flyash soil in seasonal frozen region, with stronger strength and better effect for restraining frost heaving.
出处
《路基工程》
2010年第2期46-48,共3页
Subgrade Engineering
基金
863国家高科技研究发展计划项目(2007AA11Z114)
关键词
石灰土
二灰土
配合比
最佳干密度
无侧限抗压强度
冻胀量
lime soil
lime-flyash soil
mixing proportion
optimum dry density
unconfined compressive strength
heaving value of frozen soil
