Use of Microorganism to Improve the Strength of Cement Mortar

The primary objective of this study was to discern the effect of addition of the anaerobic microorganism on the compressive strength of cement-sand mortar. Researchers examined a method of strength improvement of cement-sand mortar by the microbiologically induced mineral precipitation. A thermophilic anaerobic microorganism was used in various cell concentrations with the mixing water. Results of this study revealed that a 25% increase in 28 day compressive strength of cement mortar was achieved with the addition of 10 super 5 cell/milliliters of mixing water. The strength improvement was caused by growth of filler material within the pores of the cement-sand matrix as exhibited by scanning electron microscopy. The modification in pore size distribution, and total pore volume of cement-sand mortar due to such growth, was also observed. For comparison, E. coli microorganisms were also used in the cement mortar, but there was no observable improvement in strength.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Authors:
  • Ghosh, P
  • Mandal, S
  • Chattopadhyay, B D
  • Pal, S
• Publication Date: 2005-10

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 1980-1983
• Serial:
  • Cement and Concrete Research
  • Volume: 35
  • Issue Number: 10
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Cement mortars; Compressive strength; Fillers (Materials); Improvements; Microorganisms; Microstructure; Pore size distribution
• Uncontrolled Terms: Cemented sand; Scanning electron microscopy
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01011020
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 23 2005 11:03PM