| 二灰碎石抵抗冻融破坏作用的研究 |
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| 引用本文： | 韩琪,董希斌,孙凌.二灰碎石抵抗冻融破坏作用的研究[J].森林工程,2007,23(5):45-47. |
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| 作者姓名： | 韩琪 董希斌 孙凌 |
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| 作者单位： | 1. 东北林业大学,哈尔滨,150040
2. 黑龙江工程学院,哈尔滨,150050 |
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| 基金项目： | 黑龙江省交通厅萤点科技项目 |
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| 摘 要： | 针对黑龙江省寒冷的气候特点,对已建公路二灰碎石半刚性基层的使用状况进行调查,分析破坏的原因,并与研究成果进行比较。利用低温实验室模拟自然环境进行冻融循环试验,确定二灰碎石在一定的冻融循环作用下的强度衰减系数,为冻融循环作用下的基层设计提供有一定可靠度的基层强度设计值,保证基层在使用周期内具有一定的冻融耐久性,从而可以提高道路使用质量和延长道路使用寿命,降低维护费用。
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| 关 键 词： | 二灰碎石 抗冻性 冻融循环 |
| 文章编号： | 1001-005X（2007）05-0045-03 |
| 收稿时间： | 2007-05-22 |
| 修稿时间： | 2007年5月22日 |
Study of Lime -fly Ash Macadam Against Freezing and Thawing Damage |
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| Han Qi,Dong Xibing,Sun Ling.Study of Lime -fly Ash Macadam Against Freezing and Thawing Damage[J].Forest Engineering,2007,23(5):45-47. |
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| Authors: | Han Qi Dong Xibing Sun Ling |
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| Institution: | Northeast Forestry University, Harbin 150040;Heilongjiang Institute of Technology, Harbin 150050 |
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| Abstract: | According to climate characteristics in Heilongjiang Province,the using state of lime-fly ash macadam as base layer in existing highway was investigated,and the failure reason was analyzed and compared with researched result in this paper.Freeze-thaw cycle test by using low-temperature laboratory was carried out to simulate natural environment,the strength attenuation coefficient under the certain freeze-thaw cycles of lime-fly ash macadam was identified.To guarantee certain freeze-thaw durability of base layer within normal using period,the reliable base layer strength designing number was provided.These outcomes can enhance road using performance,prolong road using life and decrease cost of maintenance fee to a certain extent. |
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| Keywords: | lime-fly ash macadam frost resistance freeze-thaw cycle |
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