Electrical conductivity to determine maturity and activation energy in concretes

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• 作者：Michelle R. Nokken
• 关键词：Maturity ; Activation energy ; Electrical conductivity
• 刊名：Materials and Structures
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：49
• 期：6
• 页码：2209-2221
• 全文大小：721 KB
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• 作者单位：Michelle R. Nokken (1)
  
  1. Building, Civil and Environmental Engineering, Concordia University, Montreal, QC, H3G1M8, Canada
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873
• 卷排序：49

文摘

The concepts of maturity and activation energy have been primarily used for prediction of compressive strength. Less frequently, these principles have been used for investigation of the temperature–time relationship of other properties. In this research, electrical conductivity was monitored over time for the period of 1–28 days for 10 concrete mixtures. It was found that the typical relationship that holds for compressive strength in relation to the maturity does not hold for conductivity. In addition, activation energy was determined by the Arrhenius relationship using four methods of calculating the rate constant. Values calculated for activation energy varied considerably depending on the method used with the exponential rate constant giving the lowest values. Comparing results to published literature, the linear hyperbolic method most often cited gives similar values of activation energy in this research to those published for either hydration or strength. Keywords Maturity Activation energy Electrical conductivity