Mexico-based design practice MANUFACTURA has developed Corncretl, a bio-based building material intended as a lower emissions alternative to conventional concrete. Corncretl blends dried corn residues, recycled nejayote (a calcium-rich wastewater byproduct from traditional corn processing), limestone, and other mineral aggregates into a composite that can be deposited with robotic 3D printing systems for construction applications, tells 3D Printing Industry Blog.
Conventional concrete relies heavily on Portland cement, whose production is energy-intensive and accounts for a large share of global CO₂ emissions. By contrast, Corncretl uses lime-based chemistry and locally sourced organic materials, which reduce embodied carbon by up to about 70% compared with standard concrete mixes, according to MANUFACTURA.
The formulation uses agricultural waste from Mexico’s corn-processing industry that would otherwise be discarded and combines it with mineral binders and aggregates. The mixture supports 3D printing without traditional formwork when paired with a continuous-feed extruder and robotic arm. This setup enables precise deposition of material, geometric flexibility, and reduced construction waste.
Beyond lower emissions, Corncretl exhibits functional benefits linked to its lime base. Lime hardens at ambient temperatures and consumes less energy in production than Portland cement, contributing further to emissions reductions. The material’s chemistry also supports natural moisture regulation and self-healing of minor surface cracks as unreacted lime recrystallizes over time.
Prototypes printed with Corncretl have included modular walls and structural elements in test settings. Using agricultural residues not only cycles waste into building stock but also aligns with circular material strategies in construction. By localizing raw material sources and reducing reliance on carbon-heavy cement, MANUFACTURA’s approach points to a scalable, low-impact fabrication path that combines heritage processes with digital fabrication technologies.
Corncretl’s development adds to growing interest in sustainable construction materials that reduce greenhouse gas emissions while maintaining performance, particularly in additive manufacturing workflows where material efficiency and environmental outcomes are critical considerations.