• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >The durability of concrete using concrete plant wash water.
【24h】

The durability of concrete using concrete plant wash water.

机译：混凝土的耐久性使用混凝土厂用水冲洗。

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

Hundreds of ready-mix concrete trucks are dispatched daily from ready-mix concrete plants. On average, a concrete truck has a carrying capacity ranging from 7 to 9 cubic metres of concrete, requiring about 1500 litres of water. In addition, 500 to 1300 litres of water are used to wash out the excess concrete when the truck returns. Based on these figures, it is clear that the ready-mixed concrete industry consumes large amounts of fresh water.; The purpose of this study is to determine the feasibility of using the wash water as mixing water in new concrete. The specific goal of this project is to determine the influence of the high pH and dissolved solids content of the wash water on the durability of concrete, particularly in regard to de-icing salt induced corrosion of steel reinforcement. Two types of mix designs were used in this research: a standard class N and a higher strength, structural C2 concrete. Two sets of concrete specimens were made with both mix designs: one with wash water and one with clean water. The project consists of a multi-component experimental program, beginning with wash water characterization, then pore solution and cement chemistry, followed by an evaluation of the effect of wash water on concrete workability and mechanical properties, resistance to de-icing salt scaling, and corrosion of reinforcing steel embedded in the concrete. In addition, the effect of the wash water on the effectiveness of air entraining agents (AEA) was determined using air void analysis of specimens with different AEA contents.; On the basis of the results obtained from the comparative study using wash water versus tap water, it appears that wash water can be used as mixing water for the production of concrete without compromising the durability properties related to corrosion and salt scaling performance. In addition, the mechanical and plastic properties of wash water concrete meet all standards pertaining to the use of wash water concrete and are similar to those of tap water concrete. Finally, the pore solution, thermal analyses, and water analyses of wash water and tap water showed comparable results. Overall, with regards to the tests conducted thus far, the use of wash water as mixing water in concrete poses no durability concerns.
机译：每天从预拌混凝土工厂派出数百辆预拌混凝土卡车。平均而言，一辆混凝土卡车的载重量为7至9立方米，需要约1500升水。此外，卡车返回时，还使用500至1300升水冲洗掉多余的混凝土。根据这些数字，很明显，预拌混凝土行业消耗了大量的淡水。这项研究的目的是确定在新混凝土中使用洗涤水作为混合水的可行性。该项目的具体目标是确定清洗水的高pH和溶解固体含量对混凝土耐久性的影响，尤其是在除冰盐引起的钢筋增强腐蚀方面。本研究中使用了两种类型的混合料设计：标准N级和更高强度的结构性C2混凝土。用两种混合设计制作了两组混凝土标本：一组用洗水，另一组用清水。该项目包括一个多部分的实验程序，首先是洗涤水的表征，然后是孔隙溶液和水泥化学，然后评估洗涤水对混凝土可加工性和机械性能，抗结冰盐垢的抵抗力以及埋在混凝土中的钢筋的腐蚀。另外，通过对具有不同AEA含量的样品进行气孔分析，确定了洗涤水对引气剂（AEA）有效性的影响。根据使用洗涤水与自来水进行比较研究的结果，似乎可以将洗涤水用作生产混凝土的混合水，而不会影响与腐蚀和盐分腐蚀有关的耐久性。另外，洗涤水混凝土的机械和塑性性能满足有关洗涤水混凝土使用的所有标准，并且与自来水混凝土相似。最后，孔隙水，热分析以及洗涤水和自来水的水分析显示了可比的结果。总体而言，就迄今为止进行的测试而言，在混凝土中使用洗涤水作为混合水不会引起耐久性问题。

著录项

  • 作者

    Tran, Khanh An.;

  • 作者单位

    University of Waterloo (Canada).;

  • 授予单位 University of Waterloo (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.A.Sc.
  • 年度 2007
  • 页码 157 p.
  • 总页数 157
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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