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首页> 外文学位 >Impact of curing time and curing stress on the mechanical behavior of cement-improved and cement-fiber-improved soft soil.
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Impact of curing time and curing stress on the mechanical behavior of cement-improved and cement-fiber-improved soft soil.

机译：养护时间和养护应力对水泥改良和水泥纤维改良软土力学性能的影响。

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摘要

In order to improve the engineering properties of soft soils, materials, such as cement and fiber, can be introduced to the soil mass. Currently, design criterion for a cement-soil mixture requires only the measurement of unconfined compressive strength. This simple measurement may not be adequate to describe the behavior that results from differing field loading conditions. A series of consolidation tests and unconfined compression tests were conducted with special attention being paid to the effects of curing time and vertical curing stress. It is shown that the introduction of cement into soft soils results in decreased compressibility and increased unconfined compressive strength when compared to unimproved soils. Also, the unconfined compressive strength of the cement-soil mixture increases with curing time and with vertical confining stress. The existence of fiber in the cement-soil mixture can significantly improve its ductility in the post-peak strength zone without significantly changing the unconfined compressive strength. The stiffness of the mixture can be increases when the mixture is cured under vertical confining stress, compared with the mixture without curing stress. Strength gain over curing time is modeled and a general unconfined compressive strength prediction equation is developed.
机译：为了改善软土的工程特性，可以将水泥和纤维等材料引入土壤中。当前，水泥-土壤混合物的设计标准仅需要测量无限制的抗压强度。这种简单的测量可能不足以描述由不同的现场负载条件导致的性能。进行了一系列固结测试和无边压缩测试，并特别注意了固化时间和垂直固化应力的影响。结果表明，与未经改良的土壤相比，向软土中引入水泥会降低可压缩性并增加无侧限抗压强度。而且，水泥土混合物的无限制抗压强度随着固化时间和垂直围压的增加而增加。水泥-土壤混合物中纤维的存在可以显着提高其在峰后强度区域的延展性，而不会显着改变无侧限抗压强度。与没有固化应力的混合物相比，在垂直限制应力下固化混合物时，可以提高混合物的刚度。对随着固化时间的强度增加进行建模，并建立通用的无限制抗压强度预测方程。

著录项

  • 作者

    Starcher, Ryan.;

  • 作者单位

    University of South Carolina.;

  • 授予单位 University of South Carolina.;
  • 学科 Engineering Civil.
  • 学位 M.S.
  • 年度 2013
  • 页码 66 p.
  • 总页数 66
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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