Researchers at the University of Virginia have developed a new cement mixture for 3D printing

Researchers at the University of Virginia have made significant progress in the rapidly advancing field of 3D-printed concrete with the development of a more sustainable, printable cement composite.

This new mixture combines graphene with limestone and calcined clay cement (LC2), offering improved strength and durability while significantly reducing CO₂ emissions. This represents a promising solution to the environmental challenges of 3D printed construction.

“Our goal was to design a printable concrete that performs better and is more eco-friendly,” said Osman Ozbulut, a professor at UVA’s Department of Civil and Environmental Engineering. “The addition of graphene to LC2 cement offers a unique opportunity to lower carbon emissions while maintaining the strength and flexibility required for 3D printed construction.”

The study, led by visiting scientist Tuğba Baytak and PhD student Tawfeeq Gdeh, investigated the flow properties, mechanical performance and environmental impact of the new mixture. In collaboration with the Virginia Transportation Research Council (VTRC), Baytak and Gdeh improved the properties of the LC2 cement by adding graphene, which significantly increased its suitability for 3D printing applications.

“This kind of innovation is essential for the future of construction, and I’m proud to be part of the team driving this forward,” said Baytak.

A key component of the research was life cycle analysis (LCA), conducted by Zhangfan Jiang in collaboration with Professor Lisa Colosi Peterson. The LCA showed that the graphene-reinforced LC2 concrete can reduce greenhouse gas emissions by about 31% compared to conventional printable concretes.

“Being able to see the full environmental footprint of this new concrete was important,” explained Jiang. “It not only exhibits better mechanical performance but also has a lower environmental impact, making 3D concrete construction technology more sustainable compared to traditional 3D printing methods with higher carbon emissions.”

Working with the VTRC allowed the team to evaluate the material’s potential applications in road construction, highlighting its practical relevance.

“It’s exciting to be part of a project that addresses both the technical demands of modern construction and the urgent need for more eco-friendly materials,” said Gdeh.

The research was funded in part by the University of Virginia’s 3 Cavaliers Program and the Scientific and Technological Research Council of Turkey (TUBITAK). The findings were published in the Journal of Building Engineering and mark an important step towards more sustainable building practices through the use of innovative 3D printing technologies.