Abstract Concrete shrinkage and creep under variable hydric conditions are important factors for the safety and durability of concrete especially in nuclear reactor or nuclear waste storage background. A large (and long – more than 900 days) experimental campaign, conducted on two different concretes, has therefore been designed to study the strains of non loaded and loaded concretes submitted to drying and liquid water imbibition cycles. For the purposes of comparison, concrete strains and mass variations during drying only (50% RH) and/or following cycles of drying/rewetting were also recorded. This allowed the identification of desiccation shrinkage, basic creep and drying creep at 10 MPa of axial stress. Important results were found and have shown that the final mass and strain are not deeply modified by the introduction of a rewetting phase either for a loaded or a non loaded material.

中文翻译：

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干湿循环下的混凝土收缩和蠕变

摘要 变氢条件下混凝土的收缩和徐变是影响混凝土安全性和耐久性的重要因素，尤其是在核反应堆或核废料储存背景下。因此，在两种不同的混凝土上进行了一项大型（且持续时间超过 900 天）的实验活动，旨在研究经受干燥和液态水吸收循环的未加载和加载混凝土的应变。出于比较的目的，还记录了仅在干燥 (50% RH) 和/或随后的干燥/再润湿循环期间的混凝土应变和质量变化。这允许识别在 10 MPa 轴向应力下的干燥收缩、基本蠕变和干燥蠕变。