'Microbial mortar'- restoration of degraded marble structures with microbially induced carbonate precipitation

James M. Minto, Qian Tan, Rebecca J. Lunn, Gráinne El Mountassir, Hongxian Guo, Xiaohui Cheng

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)
33 Downloads (Pure)

Abstract

To evaluate a restoration strategy for highly degraded marble structures, microbially induced carbonate precipitation (MICP) has been employed to reduce porosity and permeability in a column filled with coarse crushed marble. A 3D X-ray tomography scan revealed the spatial variation in porosity throughout the column and tracer breakthrough curves, recorded at intervals during treatment, enabled derivation of core-scale fluid transport properties and their alteration by precipitating carbonate. Micro-continuum scale flow modelling based on the X-ray data indicated that treatment led to changes in the pore network structure with flow increasingly focused into a smaller number of faster flowing open channels.
Original languageEnglish
Pages (from-to)44-54
Number of pages11
JournalConstruction and Building Materials
Volume180
Early online date2 Jun 2018
DOIs
Publication statusPublished - 20 Aug 2018

Keywords

  • microbially induced carbonate precipitation
  • marble restoration
  • X-ray CT
  • micro-continuum flow modelling

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