| 季冻区半刚性基层材料工程特性试验研究 |
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| 引用本文： | 李长雨,刘寒冰,魏海斌.季冻区半刚性基层材料工程特性试验研究[J].路基工程,2010,0(2):46-48. |
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| 作者姓名： | 李长雨 刘寒冰 魏海斌 |
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| 作者单位： | 1.吉林大学交通学院, 长春1 300 22 |
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| 基金项目： | 863国家高科技研究发展计划项目(2007AA11Z114) |
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| 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。
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| 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 |
| 收稿时间： | 2019-11-09 |
Experimental Study on Engineering Characteristics of Semi-rigid Base Materials in Seasonal Frozen Region |
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| Authors: | LI Chang-yu LIU Han-bing WEI Hai-bin |
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| Affiliation: | 1.School of Traffic and Transportation/a>;Jilin University/a>;Changchun 130022/a>;China/a>;2.School of Civil Engineering/a>;Changchun Institute of Technology/a>;Changchun 130012/a>;China |
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| Abstract: | 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. |
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| Keywords: | lime soil lime-flyash soil mixing proportion optimum dry density unconfined compressive strength heaving value of frozen soil |
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