Importance of End Surface Preparation when Testing High Strength Concrete Cylinders

When testing high strength concrete, end preparation of the cylinders is one of the most important variables influencing the compressive strength results. As the strength increases, concrete becomes increasingly brittle and more susceptible to testing-related variables. Other variables include specimen geometry and size, age, moisture content, moisture distribution, loading rate, and testing machine parameters. This article focuses on end surface preparation when testing high strength concrete cylinders. End preparation may consist of bonded caps, unbonded caps, or ground ends. The authors summarize the results of comparative tests using these different methods. Topics include capping material thickness, capping material strength, bonded caps versus unbonded caps. The article concludes with a brief summary of the existing standards for end preparation. Portions of the article are excerpted from "High-Strength Concrete" by Michael A Calderone, published by Taylor & Francis, 2009.


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  • Accession Number: 01144623
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 10 2009 10:43AM