As an important inorganic material, geopolymer has been widely used for ceramics and sustainable cement in concrete. Sodium aluminosilicate hydrate (N-A-S-H) gel known as the zeolite precursor gel has the most critical impact on the performance of geopolymer. The nano/micromechanical properties of N-A-S-H have been investigated in several studies, but the resutls are always inconsistent. A novel “compromise approach” using Maximum Likelihood Estimation (MLE) for deconvolution of nanoindentation data is introduced to fundamentally further understand this issue in this study. Correlation and difference of different statistical techniques are compared to clarify the rationality of this method. Multiple characterization techniques including microstructure observation at micro -and nano-scale, element analysis, and crystal identification are applied to reveal the mechanisms. The results indicate that the elastic modulus and hardness of the N-A-S-H gel in geopolymer under different silica modulus and curing conditions vary in a small range from 10.50 to 14.30 GPa and from 0.40 to 0.57 GPa, respectively. When applying statistical nanoindentation in geopolymer, two kinds of spurious phases, mixed phases and sub-phases are unavoidable. For the MLE method adopted, the errors generated from analytical technique were estimated to be only 0.68 and 0.13 GPa for elastic modulus and hardness, respectively.

作为一种重要的无机材料，地质聚合物已广泛用于陶瓷和混凝土中的可持续水泥。水合铝硅酸钠（NASH）凝胶被称为沸石前体凝胶，对地质聚合物的性能影响最大。NASH的纳米/微机械性能已在数项研究中进行了研究，但结果始终不一致。引入了一种新颖的“折衷方法”，该方法使用最大似然估计（MLE）对纳米压痕数据进行反卷积，以从根本上进一步了解本研究中的这一问题。比较了不同统计技术的相关性和差异性，以阐明该方法的合理性。多种表征技术，包括微观和纳米级的微观结构观察，元素分析，通过晶体鉴定来揭示其机理。结果表明，在不同的二氧化硅模量和固化条件下，地质聚合物中NASH凝胶的弹性模量和硬度分别在10.50至14.30 GPa和0.40至0.57 GPa的较小范围内变化。当在地质聚合物中应用统计纳米压痕时，不可避免地会出现两种杂散相，即混合相和子相。对于采用的MLE方法，分析技术产生的误差的弹性模量和硬度分别估计仅为0.68和0.13 GPa。当在地质聚合物中应用统计纳米压痕时，不可避免地会出现两种杂散相：混合相和子相。对于采用的MLE方法，分析技术产生的误差的弹性模量和硬度分别估计仅为0.68和0.13 GPa。当在地质聚合物中应用统计纳米压痕时，不可避免地会出现两种杂散相：混合相和子相。对于采用的MLE方法，分析技术产生的误差的弹性模量和硬度分别估计仅为0.68和0.13 GPa。