A renewable energy company developing next-generation wind turbines required an innovative solution to overcome the logistical and economic challenges of deploying turbines up to 140 meters tall. Traditional steel or precast concrete bases for these massive structures presented significant obstacles: transportation of oversized components to remote wind farm sites, high carbon footprint from steel manufacturing and long-distance hauling, excessive manual labor for on-site assembly, and supply chain constraints for large-scale steel sections. The client needed a transformative approach that would enable on-site construction of concrete pedestals up to 20 meters high using additive manufacturing technology, reducing environmental impact while improving deployment speed and cost-effectiveness.
The Details
Industry
Energy & Environment
CAPABILITIES APPLIED
The project presented unprecedented technical, logistical, and regulatory challenges requiring multidisciplinary engineering expertise:
Scale and Structural Requirements: Developing additive manufacturing equipment capable of printing concrete structures 20 meters tall and supporting 120-130 meter steel tower sections demanded structural engineering for extreme loads, seismic and wind force calculations, and material specifications ensuring decades-long durability in harsh outdoor environments.
Equipment Design and Safety Compliance: The 3D printing system required a massive steel gantry crane-like structure operating in field conditions. Structural analysis needed to ensure the printer frame met United States safety codes and localized regulations, requiring adaptation of the original design for compliance with OSHA, ANSI, and regional building standards while maintaining operational stability during the printing process.
Material Formulation and Process Development: Concrete mixtures for additive manufacturing differ significantly from traditional poured concrete. The material needed to be pumpable for continuous extrusion, set quickly enough to support subsequent layers without slumping, achieve sufficient strength for structural loading, remain workable in varying environmental conditions (temperature, humidity, wind), and utilize locally sourced aggregates and materials to reduce transportation costs and environmental impact.
Concrete Batching and Delivery Integration: The printing system required continuous material supply without interruption. Specifications for mixing equipment and batch plant operations needed to ensure consistent material properties, coordinate batch timing with print speed, prevent material hardening in delivery systems, and maintain quality control throughout multi-day printing operations.
Remote Site Deployment Challenges: Wind farm locations typically occupy remote, difficult-to-access terrain. The solution needed rapid setup and teardown capabilities for moving between turbine sites, operation in extreme weather conditions, minimal infrastructure requirements (power, water, material storage), and field serviceability without specialized facilities.
International Collaboration and Milestone Management: The program involved coordination with an international team of partners, each contributing specialized capabilities. Department of Energy funding imposed specific milestones and performance metrics requiring coordination across multiple organizations, countries, and technical disciplines while maintaining schedule adherence and budget compliance.
Re:Build supported trial builds in Denmark, including a 10-meter pedestal and a subsequent advanced version. Structural analysis of the 3D printer gantry frame ensured compliance with U.S. safety codes in preparation for domestic deployment.
Specifications were developed for mixing equipment and concrete batch plant systems, with procurement and integration into the printing platform. A testing laboratory was established to validate concrete mix designs using locally sourced materials and develop replicable quality control procedures.
Ongoing engineering and fabrication support addressed challenges as the program progressed toward full-scale 20-meter pedestal deployment, with adaptive responses to field conditions and material performance variations.
The program met Department of Energy and client objectives on schedule, advancing the technoeconomic feasibility of on-site additive manufacturing for wind energy infrastructure and demonstrating technology viability at increasing scales.
