Characterization of concrete affected by delayed ettringite formation using the stiffness damage test
Characterization of concrete affected by delayed ettringite formation using the stiffness damage test
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使用刚度损伤试验表征受延迟钙矾石形成影响的混凝土
DOI：
10.1016/j.conbuildmat.2017.12.012
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发表时间：
2018
影响因子：
7.4
通讯作者：
K. Folliard
中科院分区：
文献类型：
--
作者：
Eric R. Giannini;L. Sanchez;Atolo Tuinukuafe;K. Folliard
与用于评估受膨胀反应影响的混凝土的常规力学试验相比，刚性损伤试验(SDT)可以提供更多的信息。一种分析SDT数据的新方法，包括计算刚性损伤和塑性损伤指数(SDI和PDI)，成功地表征了碱-硅酸反应(ASR)影响混凝土的膨胀。这项研究是首次使用SDI和PDI来表征延迟钙矾石形成(DEF)对混凝土的影响。SDI和PDI参数在0.40%以下与膨胀几乎呈线性关系。方差分析证实了SDI和PDI参数的统计意义，它们提供了标准弹性模数测试无法提供的信息。
The stiffness damage test (SDT) may provide more information than conventional mechanical tests used to assess concrete affected by expansive reactions. A new approach to analyzing SDT data involving the calculation of stiffness damage and plastic damage indices (SDI and PDI) has successfully characterized the expansion of concrete affected by alkali-silica reaction (ASR). This study is the first to implement SDI and PDI to characterize concrete affected by delayed ettringite formation (DEF). The SDI and PDI parameters have a nearly linear relationship to expansions under 0.40%. ANOVA confirms the statistical significance of the SDI and PDI parameters and that they provide information not available from standard elastic modulus tests.