Specifications include, but are not limited to: Provide a robotic additive construction (AC) printing system with an integrated mixing system for sponsored research use in the area of concrete 3D printing. The desired system will utilize a 6-axis robot arm AC printer which operates on a linear rail and includes an integrated concrete mixing system which has the capability for the start/stop functions and print flow rates to be controlled through robotic programming. Print materials used with the equipment should be flexible, non-proprietary, and able to be locally sourced. EQUIPMENT TECHNOLOGY printer type - 6-axis robot arm AC printer which operates on a linear rail. LINEAR RAIL SIZE Approximate linear rail size: 3.4 m travel/4.5 m overall length PRINT ENVELOPE SIZE Approximate print envelope size: 9.5' tall, 6' deep along entire length of rail ROBOT TYPE AND SIZE 6-axis robot arm approximate maximum reach: 21 meters approximate maximum payload: 70kg at wrist; 30kg on arm