Influences of print paths on void structure and moisture penetration resistivity of 3D printed mortal

Abstract

In this study, to reveal the influences of print paths on the mass transport resistance of 3D printed mortals, several tests related to mass transfer resistance were conducted using specimens printed by different print paths. The results of this study show that differences due to the print path are observed in the shape and location of void structure, moisture loss, and moisture penetration resistivity. The differences in mass transfer resistance caused by print paths may be due to changes in the location of continuous voids formed at the intersection of the vertical and horizontal interface of the filaments. In addition, the relationships between cumulative void volume and water absorption and between cumulative void volume and water penetration depth were analyzed, and changes in these relationships due to the print paths were observed. Based on the results of this study, a print path that does not arrange continuous voids, formed at the intersection of the vertical and horizontal interface of the filaments, in the same direction as the water penetration may be effective in ensuring mass transfer resistance of 3D printed mortal.