| 摘要: |
| 以水泥稳定碎石基层施工期和运营期在荷载作用下不发生疲劳破坏所需材料最小强度为准则，研究了水泥稳定碎石力学强度特性、疲劳特性及施工期与运营期水泥稳定碎石基层荷载响应，提出了抗疲劳断裂的水泥稳定碎石强度标准.结果表明：为防止基层在 |
| 关键词: 道路工程 水泥稳定碎石 振动法 抗疲劳断裂 强度标准 |
| DOI：10.3969/j.issn.1007 9629.2013.02.017 |
| 分类号: |
| 基金项目:中央高校基本科研业务费专项资金资助项目（CHD2011ZY007）；教育部新世纪优秀人才支持计划项目(NCET 08 0749) |
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| Strength Standard of Anti Fatigue Fracture Cement Stabilized MacadamBased on Vibration Testing Method |
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LI Di1, JIANG Ying jun1, REN Jiao long2
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1.Key Laboratory for Special Area Highway Engineering of Ministry of Education, Changan University, Xian710064, China;2.School of Transportation, Southeast University, Nanjing 210096, China
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| Abstract: |
| Cement stabilized limestone macadam is taken as object, researches on the mechanical strength characteristics and fatigue property, the load response of cement stabilized macadam during the construction and operation period are conducted. The standard of strength for fatigue fracture of the cement stabilized macadam was proposed. The researches show that in order to prevent the ultimate damage caused by construction vehicle load, the construction of next structure layer should be conducted until the curing age of cement stabilized limestone macadam is no less than 7d, and the splitting strength is no less than 0.55MPa; to prevent the fatigue damage under repeated load effect of the construction and operation vehicle during the designed usage, the 7d splitting strength should be no less than 0.70MPa. In order to facilitate application, in consideration of the relationship between compressive strength and splitting strength, it is proposed that the 7d compressive strength of cement stabilized limestone macadam should be no less than 7.0MPa. |
| Key words: road engineering cement stabilized macadam vibration testing method(VTM) anti fatigue fracture strength standard |
