US Army Corps of Engineers Awards $3.2M for 3D Printing Ultra High Performance Concrete

Share this Article

Florida International University (FIU) was awarded a $3.2 million grant by the Army Corps of Engineers for research related to use of Ultra High Performance Concrete (UHPC) for additive construction (AC) applications. UHPC is a term used for any cement mixture that is composed of especially tiny particles and possesses a number of specific advantages over more widely-used concretes, in particular, improved compressive strength.

According to the US Department of Transportation (DOT), UHPC has been commercially available in the US since 2000. Despite its many advantages over other cementitious mixtures — which, in addition to greater strength, include superior workability and low water content — the higher cost of UHPC has likely stunted its potential for broader adoption.

3D printed barracks built by ICON in partnership with the Department of Defense. Image courtesy of ICON

On the other hand, FIU professor of civil engineering Atorod Azizinamini, who is also the director of Infrastructure Research and Innovation at the school’s Office of Research and Economic Development, estimates that a cubic yard of UHPC now sells “at less than 10 percent” what it cost when it first hit the market. Moreover, the material’s combination of high durability and low permeability make it clear why it’s drawn the attention of the Army Corps of Engineers as well as that of a coastal state like Florida.

In an FIU press release about the Army Corps of Engineers grant, the co-principal investigator of the grant, Professor Kingsley Lau, of FIU’s Department of Civil and Environmental Engineering, explained, “The idea of having really high-quality concrete is that you increase the time it takes for chloride in water to penetrate the concrete and reach the steel.” Two members of the US House of Representatives from Florida, Mario Diaz-Balart and Debbie Wasserman Schulz, gave the grant bipartisan support. Diaz-Balart touted the project’s enhancement of the US’s “defense readiness”, while Wasserman Schulz said it would “…help ensure our coastal installations are more resilient.”

The “resilient” part, of course, is where AC comes in. The technology of construction 3D printing itself has only recently started to be taken seriously. Thus, relatedly, there still isn’t much research yet into AC applications for UHPC. Nevertheless, there does seem to be evidence that UHPC may be far better-suited for AC than conventional, commercially-available concrete.

Image courtesy of FIU

For one thing, the lower viscosity of UHPC compared to conventional cementitious mixtures could simply make it an inherently more viable option for construction printing. For another, depending on the reliability and consistency of the platform used to dispense the material, using UHPC may facilitate builds that are less susceptible to cracking and deformation — one of the main problems that builders utilizing AC systems are currently faced with.

From the inverse perspective, the advantages of UHPC could also be maximized by using AC techniques. As the professors involved in the project note in the press release, the strength of UHPC already allows for less material to be used by comparison with traditional concrete, which translates to a lower carbon footprint. One of the primary selling points of AC is that it’s far less wasteful than legacy construction, meaning that the combination of hardware and materials here could truly accentuate the best attributes of both.

Finally, this project is an ideal window into the manner in which global governments, and especially, the governments of the NATO allies and their partners, seem to be planning to deal with climate change. As I noted a couple of months ago in my post about the Biden administration’s National Strategy on Advanced Manufacturing, western militaries seem to be building up their IR4.0 capabilities specifically to deal with the century of ecological crises that the planet has in front of it.

Even economic resilience is environmental resilience, first and foremost. However untenable the industrial solutions that are being put on the table may look in their present form, the rationale for global policymakers is to build up the capacity for as many resiliency tools as possible — like the ability to defend coastlines against flooding with robot builders using impermeable concrete. When the emergencies happen, tools like those will be mobilized into action, and the ones that work best will form the basis for whatever economy remains in the aftermath.

3DPrint.com and SmarTech Analysis are hosting Additive Manufacturing Strategies in New York City on February 7-9, 2023. Register for the event here to learn from and network with the most exciting companies and individuals in AM.

Share this Article


Recent News

3D Printing News Briefs, July 13, 2024: Metal 3D Printer, AFWERX Award, & More

3D Printing Markets Grows 8% Year over Year



Categories

3D Design

3D Printed Art

3D Printed Food

3D Printed Guns


You May Also Like

Vision Miner Acquires its 3D Printer Supplier AddWise

Vision Miner, a provider of industrial 3D printing solutions, has announced the acquisition of AddWise, a manufacturer of 3D printers and related products, in a deal valued that the companies...

“Auto Repair Needs 3D Printing” – Harold Sears Weighs in on Auto Additive’s Launch

Despite the automotive sector’s long-time adoption of additive manufacturing (AM), the use of the technology for end parts in consumer vehicles is only just now beginning to take off. And,...

Featured

Formlabs Buys Nascent SLS 3D Printer Competitor Micronics

Formlabs, maker of accessible yet professional 3D printers, has acquired Micronics, which recently debuted with a claim of making a $2,999 3D printer. I, for one, was pretty incredulous about...

The Producers: HP’s President of 3D Printing Savi Baveja Explains How the Company is Addressing Scalability

HP (NSYE: HPQ) and the additive manufacturing (AM) industry in the US need each other. In the long run, I believe that what’s good for one will be good for...