Evaluation of water penetration of 3D printed concrete wall

Abstract

ABSTRACT

3D concrete printing construction is an additive manufacturing technique, in which, a structure is built by adding concrete layer by layer under CAD software control. 3D printing techonology is used to print amazing concrete walls which are exposed to environment, then water penetration resistance becomes one of the most important properties to 3D concrete wall. This paper presented a evaluation of water penetration of 3D concrete wall by ASTM E514. In this test, concrete walls whose dimensions of 1100x1600 mm (width and height) were printed and wet cured up to 7 days before testing. Results showed that water penetrated through at interface between 2 printed concrete layers, whereas water did not penetrate through each concrete layer, therefore, it is necessary to apply water proof layer to 3D concrete wall in case that this concrete wall is an external wall.

Key words: Concrete, 3D printing, water penetration