• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of soil science >Structural Development of Clay Soil with the Amendment of Coal Combustion By-product FGD Gypsum in Lusatia Germany
【24h】

Structural Development of Clay Soil with the Amendment of Coal Combustion By-product FGD Gypsum in Lusatia Germany

机译：卢萨西亚德国煤燃烧副产物烟气脱硫石膏改良粘土的结构发育

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The objective of this study is to investigate the development of clay soil structure with the amendment of Flue Gas Desulphurization (FGD) gypsum as a substitute for lime in Lusatia, Germany. Development of the clayey soil structure has been evaluated using parameters shear stress and penetration resistance. The sand-clay mixtures (65% sand-35% clay) representatives to the field conditions were subjected to undergo 1, 5, 10 and 20 drainage cycles (swelling and shrinking processes). Shear lines were established based on 12 load stages using box shear machine. Penetration resistance has been accomplished using modified penetrometer. Shear lines distinguished a new structure development with good crystal growth after 10 drainage cycles with FGD gypsum, where as with lime the clayey soil was rather lubricative. Penetration resistance decreased from 30 to 5 MPa with FGD gypsum amendment where as with lime amendment it reduced to 10 MPa only. From water retention characteristics it could be observed that samples were well drained indicating reduction in water holding capacity of clay due to amelioration achieved by FGD gypsum. Observations showed that FGD gypsum is more effective in amelioration compared to lime.
机译：本研究的目的是研究烟气脱硫石膏（FGD）的替代石膏在德国卢萨西亚的替代方法，从而研究粘土结构的发展。黏土结构的发展已使用参数剪切应力和抗穿透性进行了评估。代表田间条件的沙土混合物（65％沙土，35％粘土）经历了1、5、10和20次排水循环（膨胀和收缩过程）。使用箱式剪切机基于12个载荷阶段建立剪切线。使用改进的渗透计已经实现了抗渗透性。剪切线以FGD石膏经过10个排水循环后表现出具有良好晶体生长的新结构发展，其中石灰质的粘土具有相当的润滑性。 FGD石膏改良剂的抗渗透性从30 MPa降低至5 MPa，而石灰改良剂的抗渗透性仅降低至10 MPa。从保水特性，可以观察到样品排水良好，表明由于FGD石膏的改善而降低了粘土的持水能力。观察结果表明，与石灰相比，烟气脱硫石膏的改善效果更好。

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