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| 摘要: |
| 通过测量不同SO3含量下水泥粉煤灰稳定碎石的28 d劈裂强度、28 d抗压回弹模量、胀缩性能以及干缩抗裂指数,分析了SO3含量对水泥粉煤灰稳定碎石力学与抗干缩开裂性能的影响.结果表明:在粉煤灰掺量为10%(质量分数)的情况下,当SO3含量为5.8%(质量分数)时,其能显著改善水泥粉煤灰稳定碎石的力学与抗干缩开裂性能,但当SO3含量为8.8%时,会使该材料的结构破坏、力学性能恶化.另外,对微膨胀补偿基层干缩的作用机理以及SO3在水泥粉煤灰结合料中的作用机理进行了探讨. |
| 关键词: 基层 干缩开裂 水泥粉煤灰稳定碎石 SO3含量 微膨胀 |
| DOI： |
| 分类号:U414.1 |
| 基金项目:西部交通建设科技项目? |
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| Influence of SO_3 on Mechanical Performance and Dry Shrinkage Cracking Resistance of Cement-Fly Ash Stabilized Crushed-Stones |
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CHEN Xiao ZHOU Ming-kai SHEN Wei-guo
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| Abstract: |
| The cement-fly ash stabilized crushed-stones were prepared with different SO_3 contents and their 28 d splitting strength,28 d compressive resilient modulus, expansion-shrinkage and dry shrinkage anti-cracking coefficients were studied. On this base,the influence of SO_3 content on mechanical performance and dry shrinkage cracking resistance of the materials was investigated.It is proved that when SO_3 content is 5.8%(by mass), the mechanical performance and dry shrinkage cracking resistance of cement-fly a... |
| Key words: pavement base dry shrinkage cement-fly ash stabilized crushed-stones SO_3 content micro-expansion |
