3D concrete printing methods and system

A system for creating a concrete member comprising:

• a container for receiving a cementitious mix;
• a cementitious mix delivery device;
• a concrete member creating device connected to the container, the concrete member creating device defining a space between a first side plate and a second side plate, wherein the space is configured to receive the cementitious mix, wherein the space is at least partially defined by a first width and a second width adjacent the first width, and wherein the second width is narrower than the first width to squeeze the cementitious mixture as the concrete member creating device moves along a travel path;
• and
• a delivery pipe connected to the container and the concrete member creating device, the delivery pipe communicating the cementitious mix from the container into the space defined by the concrete member creating device;
• wherein the container and concrete member creating device are configured to move together in successive passes along the travel path at sequentially increasing heights as the cementitious mixture is delivered into the space defined by the concrete member creating device to create a concrete member of a desired height and length,
• wherein the first side plate defines a delivery opening communicatively coupled with the delivery pipe, and the second side plate is spaced from the first side plate along an axis transverse to the travel path, the first side plate extending along a first plane transverse to the axis, and the second side plate extending along a second plane transverse to the axis.