Mechanical properties and durability of cement-based materials are largely affected by pore structures. This paper provides an overview of several experimental techniques to characterize pore size distribution and specific surface area, with focus on pores in calcium silicate hydrates. The reviewed experimental techniques are nitrogen and water vapor sorption isotherm, proton nuclear magnetic resonance (1H-NMR) and small-angle scattering (SAS). Different pretreatment methods are compared for sorption measurements. Pore size distribution and specific surface area are analyzed using data from different methods to understand difference and consistency of these methods. It is found that pore size distribution calculated from sorption isotherm is very sensitive to adsorption model. Though specific surface areas from different techniques are quite different from each other, they are all able to detect the microstructural alteration due to long-term drying.

中文翻译：

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水泥基材料中微米级和纳米级孔隙表征的几种实验方法综述

水泥基材料的力学性能和耐久性在很大程度上受孔隙结构的影响。本文概述了几种表征孔径分布和比表面积的实验技术，重点是硅酸钙水合物中的孔隙。审查的实验技术是氮和水蒸气吸附等温线、质子核磁共振 (1H-NMR) 和小角散射 (SAS)。比较不同的预处理方法以进行吸附测量。使用来自不同方法的数据分析孔径分布和比表面积，以了解这些方法的差异和一致性。发现由吸附等温线计算的孔径分布对吸附模型非常敏感。