Colombian Engineer Brings Blockchain to US Construction

Every year, the United States generates hundreds of millions of tons of construction waste, but recycling it comes with a trust problem. How do you prove that recycled concrete or steel meets safety standards and actually reduces environmental impact?

Carlos Onate thinks he has the answer. The Colombian entrepreneur developed a Digital Material Passport system that gives recycled construction materials a verified digital identity, and he's bringing it to Miami, Houston, and Los Angeles this year.

The technology works like a digital birth certificate for building materials. Each batch of recycled material gets tagged with its origin story, performance test results, and carbon footprint data. Because the information lives on a blockchain-inspired system, it can't be altered or faked.

For contractors building highways or office towers, that means instant verification. Instead of gambling on recycled materials, they can pull up certified proof that their aggregates or steel meet engineering standards before breaking ground.

Onate tested the concept in Colombia through his company, Agregados Arenas y Gravas, which has been converting demolition waste into construction-ready materials since 2022. The approach earned national recognition for environmental innovation and proved the model could work at industrial scale.

The timing couldn't be better. As billions flow into American infrastructure projects, developers face growing pressure to document sustainability claims. Green building certifications like LEED now require detailed environmental data, and investors increasingly want proof that projects minimize carbon emissions.

The construction industry has watched other sectors transform through blockchain verification. Food companies now trace produce from farm to table, and pharmaceutical firms track medications through entire supply chains. Construction materials have lagged behind, especially recycled ones.

The Ripple Effect

The implications reach beyond environmental goals. Banks and insurance companies are starting to factor climate risk into their decisions, which means projects with verified sustainable materials could become easier to finance.

Mid-sized recycling operations currently lack standardized digital systems, even as companies like Cemex integrate circular economy practices. A widely adopted certification tool could level the playing field and make recycled materials competitive with virgin products on trust, not just price.

The financial case strengthens as regulatory requirements tighten. Proving compliance digitally beats paperwork trails, and real-time verification could speed up project approvals and reduce liability concerns.

Whether American builders embrace the technology depends on how well it integrates with existing workflows. But the fundamental question is shifting from "should we recycle?" to "how do we prove what we're using?"

Onate's U.S. presentations this year will test whether an innovation born in Colombia can help American construction waste less and build better.