REMEDIATION OF CONCRETE USING MICRO-ORGANISMS

This paper describes an innovative biotechnology-utilizing, microbiologically-induced mineral precipitation for concrete remediation. Calcite precipitation induced by Bacillus pasteurii was studied in 2 types of portland cement mortar (PCM) specimens: 1 prepared from mixing with micro-organisms, and the other with simulated cracks filled with microbial mixtures. Study results show that there was a significant increase in compressive strength of the PCM cubes containing lower concentrations of live cels. Compressive strengths of the cubes containing live or dead cell mass, however, decreased as cell concentrations and curing time increased, suggesting the interference of mortar integrity by biomass. Cracks filled with bacteria and sand demonstrated a significant increase in compressive strength and stiffness values when compared with those without cells.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Ramachandran, S K
  • Ramakrishnan, V
  • Bang, S S
• Publication Date: 2001-1

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 3-9
• Serial:
  • ACI Materials Journal
  • Volume: 98
  • Issue Number: 1
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Calcites; Compressive strength; Concrete curing; Concrete tests; Cracking of concrete pavements; Microorganisms; Portland cement concrete; Stiffness
• Uncontrolled Terms: Concrete remediation
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00807533
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 14 2001 12:00AM