Tobermorite is a natural mineral found in the microstructure of special concretes, such as autoclaved concrete and oil well cement, and along with jennite has been extensively studied for their analogy to the layered atomic structure of C–S–H. By employing creep microindentation tests, which allow measuring the logarithmic creep, this work aims at further investigating the viscoelastic behavior of such C–S–H minerals at various levels of relative humidity (RH) and porosity levels.

First, samples of 1.4 nm tobermorite and jennite were synthesized at different porosities. Then, the probed material volume was brought to the hygral equilibrium at various levels of RH before carrying out a microindentation grid. Their microstructure was statistically characterized in terms of indentation modulus (M) and hardness (H), as well as the contact creep modulus (C), which was analyzed through a logarithmic contact creep compliance in time. The effects of RH and porosity on the microindentation parameters (M, H, and C) were then characterized and compared to those measured on synthetic C–S–H and cement paste which are available in the open literature. Finally, a simplified analysis showed that the creep rate is linearly dependent on RH, thus confirming the importance of the sliding of calcium silicate sheets structure on the long-term basic creep of layered C–S–H minerals.

钙铁矿是一种天然矿物，存在于特殊混凝土（例如蒸压混凝土和油井水泥）的微观结构中，并且与菱锰矿因其与C层状原子结构的类比而被广泛研究。–小号–H.通过采用允许测量对数蠕变的蠕变微压痕测试，这项工作旨在进一步研究此类C–H–H矿物在各种相对湿度（RH）和孔隙度水平下的粘弹性行为。

首先，在不同的孔隙率下合成了1.4 nm的雪铁矿和水润沸石样品。然后，在进行微压痕网格之前，将所探查的材料体积在RH的各种水平下均达到水合平衡。通过压痕模量（M）和硬度（H）以及接触蠕变模量（C）在统计学上表征了它们的微观结构，并通过对数接触蠕变及时进行了分析。然后表征了相对湿度和孔隙率对微压痕参数（M，H和C）的影响，并将其与公开文献中提供的合成C–S–H和水泥浆测得的结果进行了比较。最后，简化分析表明，蠕变速率与RH线性相关，