Evaluation of different techniques for the diagnosis & prognosis of Internal Swelling Reaction (ISR) mechanisms in concrete
Evaluation of different techniques for the diagnosis & prognosis of Internal Swelling Reaction (ISR) mechanisms in concrete
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评估不同诊断技术
DOI：
10.1016/j.conbuildmat.2017.09.047
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发表时间：
2017
影响因子：
7.4
通讯作者：
F. Toutlemonde
中科院分区：
文献类型：
--
作者：
R. Martin;L. Sanchez;B. Fournier;F. Toutlemonde
受内部膨胀反应（ISR）影响的老化混凝土结构可能很难管理。在过去的几年里，开发了几种工具来提供混凝土结构的诊断和预后评估，特别是那些受碱-集料反应（AAR）影响的混凝土结构。在这些工具中，刚度损伤试验（SDT），损伤等级指数（DRI）和残余膨胀（RE）似乎是有前途的。然而，在评估AAR以外的不同机制时，现有工具的全面性和互补性几乎没有得到验证，这大大减少了它们用于工程目的。本文介绍了一个混凝土结构构件的整体状况评估耦合AAR和延迟钙矾石形成（DEF）通过使用上述技术。结果表明，这三个程序是同样能够提供当前的损坏程度（即定量诊断），使混凝土膨胀达到日期的估计。最后，虽然理论上不同，测试程序似乎有某种互补的特点，并可能一起使用在ISR的进展，损害的产生和未来的预后的理解。
Aging concrete structures affected by Internal Swelling Reactions (ISR) may be quite difficult to manage. Over the past years, several tools were developed to provide diagnostic and prognostic assessment of concrete structures, especially those affected by Alkali-Aggregate Reaction (AAR). Among those tools, the Stiffness Damage Test (SDT), Damage Rating Index (DRI) and Residual Expansion (RE) seem to be promising. However, the comprehensive and complementary character of the prior tools in assessing different mechanisms other than AAR was barely verified, which significantly reduces their use for engineering purposes. This paper presents the overall condition assessment of a concrete structural member affected by coupled AAR and Delayed Ettringite Formation (DEF) through the use of the above techniques. Results show that the three procedures were similarly capable of providing the current damage degree (i.e. quantitative diagnosis), enabling the estimation of the concrete expansion attained to date. Finally, although theoretically different, the test procedures seem to have a somehow complementary character, and could potentially be used together in the understanding of ISR progress, damage generation and future prognosis.