The primary concerns of the internal structure of cementbased materials involve the distribution of pores, pore size, and the manner in which they are connected. Thoroughly understanding the distributive rules of pores and the approaches to breaking their links can contribute considerably to enhancing the durability of cement-based materials. Several methods are used to measure the pores of cement-based materials; however, they cannot determine the exact location of pores or structural links. Magnetic resonance imaging (MRI) has been widely applied in physical examinations and has matured to the level of being able to obtain 3D images of the organs of recipients without causing damage. In this study, MRI and mercury intrusion porosimetry (MIP) techniques were used to analyze the distribution of pores in mortar specimens with water-to-cement (w/c) ratios of 0.45, 0.55, and 0.65. The results indicate that MRI techniques can be used to determine the spatial distribution of pores and can obtain 3D images of pores in mortar.

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