Influence of the pore feature on the water uptake in 3D printed concrete

The water uptake in 3D printed concrete along the printing direction is experimentally studied using X-CT combined with CsCl enhancing, molded concrete is as reference. The pore feature of the printed and molded concrete is analyzed by re-structuring X-CT images. Results show that in printed concrete quicker ingress of water is acquired, compared with molded concrete. This could be related to the elongated pores along the filament in printed concrete, while almost of all the pores in molded concrete are in spherical shape.