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Digital Fabrication of Biologically Cemented Spatial Structures.

Karen Antorveza Paez1, Andrea Shin Ling1, Nijat Mahamaliyev1

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|May 1, 2025
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Summary
This summary is machine-generated.

This study integrates microbially induced calcite precipitation (MICP) with 3D printing to create sustainable building materials. Researchers successfully scaled up production of biocemented structures, demonstrating a viable path for eco-friendly construction alternatives.

Keywords:
additive manufacturingbiocementationbiodesignmicrobially induced calcite precipitation (MICP)nonplanar 3D printingrobotic fabrication

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Area of Science:

  • Materials Science
  • Civil Engineering
  • Biotechnology

Background:

  • Traditional concrete production has significant environmental impacts.
  • Microbially induced calcite precipitation (MICP) offers a sustainable alternative using microbial biocementation at ambient temperatures.
  • Casting methods for MICP structures face limitations in geometry and calcification uniformity.

Purpose of the Study:

  • To integrate MICP with nonplanar granular 3D printing for enhanced biocemented structures.
  • To overcome limitations of traditional casting methods in creating complex and porous geometries.
  • To demonstrate the feasibility of large-scale 3D printing for MICP-capable structures.

Main Methods:

  • Utilized computational design, microbial techniques, and digital fabrication.
  • Employed 3D printing to create thin, porous structures with increased surface area for biocementation.
  • Investigated the calcification capabilities of Sporosarcina pasteurii in printed systems.

Main Results:

  • Successfully produced biocemented prototypes using Sporosarcina pasteurii.
  • Confirmed that increased surface exposure in printed geometries enhances microbial calcite production.
  • Demonstrated the production of MICP-capable structures exceeding 20 cm in diameter, a significant scale-up.

Conclusions:

  • The integration of MICP and 3D printing enables the creation of sustainable, biocemented construction materials.
  • Optimized geometries in 3D printing enhance the efficiency of microbial calcite precipitation.
  • This research presents a scalable approach for producing large-dimension MICP structures, advancing eco-friendly construction.