Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 180, Issue -, Pages 44-54Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2018.05.200
Keywords
Microbially induced carbonate precipitation; Marble restoration; X-ray CT; Micro-continuum flow modelling
Categories
Funding
- European Commission via the Marie Curie IRSES project GREAT 'Geotechnical and geological Responses to climate change: Exchanging Approaches and Technologies on a world-wide scale' [FP7-PEOPLE-2013-IRSES-612665]
- Engineering and Physical Sciences Research Council (EPSRC) Bright IDEAS award: The Big Pitch [EP/M016854/1]
- EPSRC [EP/M016854/1] Funding Source: UKRI
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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. (C) 2018 The Authors. Published by Elsevier Ltd.
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