Abstract A normalized mortar was severely heated at different temperatures up to 600 °C that led to a strong material degradation linked to its loss of water and to the Portlandite decomposition. These heating were followed by pure water rehydration as these operations have proven to be efficient as regards the recovery in the transfer properties. The present study is based on the main material's poromechanical property measurements with gas as the pressurized porous fluid. They are useful to indicate, after heating, the strong increase of the mortar's skeleton compressibility and of its expansion due to internal pressure. These phenomena are due to heating micro-cracking, pore widening and to a material fractioning highlighted with the increase in its Biot's coefficient. Unambiguously, rehydration led to a visible recovery of the mortar's poromechanical properties that is linked to newly formed hydrates.

中文翻译：

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剧烈加热和再水化对砂浆孔隙力学性能的影响

摘要 正火砂浆在高达 600 °C 的不同温度下被严重加热，导致材料严重降解，这与其失水和波特兰石分解有关。这些加热之后是纯水再水合，因为这些操作已证明就转移特性的恢复而言是有效的。本研究基于以气体作为加压多孔流体的主要材料的多孔力学性能测量。它们可用于指示加热后砂浆骨架可压缩性及其由于内部压力而膨胀的强烈增加。这些现象是由于加热微裂纹、孔变宽以及材料分馏导致其 Biot 系数增加而突出。毫不含糊，