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| 摘要: |
| 通过室内试验，研究了2种用于高等级公路半刚性基层材料（水泥碎石，二灰碎石）的回弹模量，强度指标，干缩和温缩特性，试验结果表明，半刚性基层材料抗压模量和弯拉模量存在差异，动态模量远远大于静态模量，材料的抗压强度，劈裂强度和弯拉强度等指标随试验方法的不同而存在显著差别，因此，应根据半刚性基层的受力状态选用对应的材料强度和模量指标。 |
| 关键词: 半刚性基层 动态模量 强度 失水收缩 温缩 试验 沥青路面 |
| DOI： |
| 分类号:U416.217 |
| 基金项目:上海市科学技术发展基金资助项目 (0 0 2 112 0 43) |
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| Experimental Study on the Performance of Semi-rigid Base Coarse Materials |
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CONG Lin GUO Zhong yin JI Yu xiong LUO Fang yan JIANG Ai feng
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| Abstract: |
| In this paper, the performances of two kinds of semi rigid base coarse materials, cement bound gravel material (CBGM) and lime fly ash concrete, applied for high class highways were tested and studied, including the strength characteristics of compression, bending and splitting, elastic dynamic and static modulus of both compression and bending. The performances of dry shrinkage and temperature shrinkage were also tested. It can be concluded from the results that there is much great difference among the three kinds of strength parameters. The dynamic and static moduli are also very different to each other. So that, which of the base material parameters to be applied in practice should be determined by the base stress conditions. |
| Key words: semi rigid base,dynamic modulus,strength,dry shrinkage,temperature shrinkage, |
