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<p>This work seeks to establish a correlation between calcium oxychloride (CAOXY) formation and subsequent damage in concrete specimens exposed to varying solution storage regimes.</p><p>Across the body of literature on CAOXY impact, inconsistencies in research methods and procedures cause potential differences in observations, results, and conclusions. When conducting laboratory research to produce results relatable to the in-service experience of concrete infrastructure, inconsistencies need to be identified, investigated, and eliminated. In this work, concrete flexural beam specimens were subjected to varying storage solution regimes, that included renewing the solution every 45&#xa0;days, every 90&#xa0;days, and leaving the solution static for 180&#xa0;days for several sets of flexural beam specimens. The results were evaluated for determination of whether static or dynamic solution renewal resulted in varying CAOXY development or deterioration. A significant effect of solution renewal on damage was not observed, most likely due to the cracks in the samples leading to high ingress regardless of solution renewal. Incorporating guidance on solution renewal procedures for laboratory testing of concrete specimens subjected to calcium chloride solution into standardized testing protocols is critical.</p>

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Impact of varying solution renewal regimes on calcium oxychloride damage in concrete mixtures

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • Joey Parker,
  • Casey Jones,
  • Prannoy Suraneni,
  • W. Micah Hale

摘要

This work seeks to establish a correlation between calcium oxychloride (CAOXY) formation and subsequent damage in concrete specimens exposed to varying solution storage regimes.

Across the body of literature on CAOXY impact, inconsistencies in research methods and procedures cause potential differences in observations, results, and conclusions. When conducting laboratory research to produce results relatable to the in-service experience of concrete infrastructure, inconsistencies need to be identified, investigated, and eliminated. In this work, concrete flexural beam specimens were subjected to varying storage solution regimes, that included renewing the solution every 45 days, every 90 days, and leaving the solution static for 180 days for several sets of flexural beam specimens. The results were evaluated for determination of whether static or dynamic solution renewal resulted in varying CAOXY development or deterioration. A significant effect of solution renewal on damage was not observed, most likely due to the cracks in the samples leading to high ingress regardless of solution renewal. Incorporating guidance on solution renewal procedures for laboratory testing of concrete specimens subjected to calcium chloride solution into standardized testing protocols is critical.