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

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Minto, James M. and Tan, Qian and Lunn, Rebecca J. and El Mountassir, Gráinne and Guo, Hongxian and Cheng, Xiaohui (2018) 'Microbial mortar'- restoration of degraded marble structures with microbially induced carbonate precipitation. Construction and Building Materials, 180. pp. 44-54. ISSN 0950-0618 (https://doi.org/10.1016/j.conbuildmat.2018.05.200)

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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.

ORCID iDs

Minto, James M. ORCID logoORCID: https://orcid.org/0000-0002-9414-4157, Tan, Qian, Lunn, Rebecca J. ORCID logoORCID: https://orcid.org/0000-0002-4258-9349, El Mountassir, Gráinne ORCID logoORCID: https://orcid.org/0000-0003-4213-8182, Guo, Hongxian and Cheng, Xiaohui;
CORE (COnnecting REpositories)