• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC'2009-China) >TIME DEPENDENCY OF CHLORIDE MIGRATION COEFFICIENT IN SELF-COMPACTING CONCRETE
【24h】

TIME DEPENDENCY OF CHLORIDE MIGRATION COEFFICIENT IN SELF-COMPACTING CONCRETE

机译：自填充混凝土中氯离子迁移系数的时间依赖性

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

The chloride diffusion coefficient of concrete is strongly decreasing in time. Neglecting this aspect in the modelling of the diffusion process will overestimate the chloride penetration depth and thus lead to an uneconomic design.In order to get an accurate insight in this decreasing process, 16 self-compacting concrete mixes were made. Four types of cement (portland cement and blast furnace slag cement),three types of filler (fly ash and two types of limestone filler with a different grading curve) and two types of coarse aggregate are used and the influence of the amount of powder and the amount of water is studied. The chloride migration coefficient was experimentally determined with the non-steady state migration test, developed by Tang et al. and described in NT BUILD 492, and making use of an electrical field. This migration coefficient was determined at different concrete ages, up to 5 year. From the migration tests, the diffusion coefficients were deduced. The decrease in time of the diffusion coefficients is studied and modelled. Both the experimental and modelling results will be presented and discussed in the paper.
机译：随着时间的推移，混凝土的氯离子扩散系数会大大降低。在扩散过程的建模中忽略此方面会过高地估计氯化物的渗透深度，从而导致设计不经济。为了准确了解这一递减过程，共制作了16种自密实混凝土混合物。使用四种类型的水泥（波特兰水泥和高炉矿渣水泥），三种类型的填料（粉煤灰和两种具有不同分级曲线的石灰石填料）和两种类型的粗骨料，以及粉体和粉量的影响研究了水的量。氯化物的迁移系数是由Tang等人开发的非稳态迁移试验通过实验确定的。并在NT BUILD 492中进行了描述，并利用了电场。该迁移系数是在不超过5年的不同混凝土年龄下确定的。从迁移测试中，推导了扩散系数。对扩散系数的时间减少进行了研究和建模。本文将介绍和讨论实验结果和建模结果。

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