• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Association of State Dam Safety Officials, Inc. 2002 Annual Conference Sep 8-11, 2002 Tampa, Florida >MODIFICATION OF EMBANKMENT CORE MATERIAL FOR EROSION RESISTANCE
【24h】

MODIFICATION OF EMBANKMENT CORE MATERIAL FOR EROSION RESISTANCE

机译：改性路基材料的抗冲蚀性能

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

1. Two base soils which appear very similar to the naked eye and basic laboratory testing may differ considerably based on their soil chemistry. The differences could not be attributed to clay mineralogy. 2. Standard gradation testing may not correctly represent soil peds. 3. Bentonite contributes very little to soil strength, lime showed an improvement of up to five times and cement showed an improvement up to 100 times. 4. Bentonite produced a more ductile material where lime and cement produced more brittle material. 5. Shrinkage behavior differed between the flowtill and outwash soils. The cement mixtures had the least volume change and appeared to stabilize the flowtill base soil. 6. The erodibility of the base soils was confirmed. The bentonite admixture provided no erosion resistance. Lime admixtures above 8% were partially to completely successful in providing erosion resistance. Cement admixtures were completely effective at concentrations greater than 4%. 7. Results of this study are only relevant to the two base soils tested. Results on other soil types will produce different results. 8. As of the submission date for this paper a followup study was underway. In that study a cement/bentonite combination admixture is being evaluated. The goal of the combination study is to find a material which has the erosion resistance of cement and the plasticity of bentonite. Additionally, a change has been made from sodium bentonite (found to be dispersive in the initial study) to calcium bentonite. The trial combinations for cement (c) and bentonite (b) in the second study will be (2%c,2%b), (2%c,4%b), (2%c,6%b), and (2%c,8%b). 9. Based on the results of the initial study, 2% cement was selected as the admixture to produce an erosion resistant core material for use on the modification of Keechelus Dam. Based on the outcome of the followup study, the admixture will likely be changed to a cement/bentonite combination. As of the writing of this paper, that outcome is not known.
机译：1.两种看起来与肉眼非常相似的基础土壤和基础实验室测试可能会因其土壤化学性质而有很大差异。差异不能归因于粘土矿物学。 2.标准等级测试可能无法正确代表土壤污染物。 3.膨润土对土壤强度的贡献很小，石灰最多可提高五倍，水泥最多可提高100倍。 4.膨润土产生的材料更具延性，而石灰和水泥产生的材料则较脆。 5.翻耕土壤和外洗土壤的收缩行为不同。水泥混合物的体积变化最小，并且似乎稳定了流动基层土壤。 6.证实了基础土壤的可蚀性。膨润土混合物没有提供抗侵蚀性。 8％以上的石灰外加剂在提供抗腐蚀方面部分成功。水泥外加剂在浓度大于4％时完全有效。 7.这项研究的结果仅与测试的两种基础土壤有关。在其他土壤类型上的结果将产生不同的结果。 8.截至本文提交之日，正在进行后续研究。在该研究中，正在评估水泥/膨润土组合掺和料。组合研究的目的是找到一种具有水泥抗侵蚀性和膨润土可塑性的材料。此外，已将膨润土钠（在最初的研究中发现是分散的）改为钙膨润土。在第二项研究中，水泥（c）和膨润土（b）的试验组合为（2％c，2％b），（2％c，4％b），（2％c，6％b）和（2％c，8％b）。 9.根据初步研究的结果，选择2％的水泥作为掺和料，以生产抗侵蚀的芯材，用于Keechelus大坝的改型。根据后续研究的结果，外加剂可能会更改为水泥/膨润土组合。截至本文撰写时，该结果尚不清楚。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号