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Pore structure change and physico-mechanical properties deterioration of sandstone suffering freeze-thaw actions
•The pore structure of sandstone under freeze-thaw was investigated by MIP test and quantified by a tri-modal exponential function.•The evolution of the characteristic pore radii corresponding to nanopores, micropores and macropores and their volumetric fractions under freeze-thaw were obtained.•The...
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Published in: | Construction & building materials 2022-05, Vol.330, p.127200, Article 127200 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | •The pore structure of sandstone under freeze-thaw was investigated by MIP test and quantified by a tri-modal exponential function.•The evolution of the characteristic pore radii corresponding to nanopores, micropores and macropores and their volumetric fractions under freeze-thaw were obtained.•The relationship between the change of fractal dimension and strength loss under freeze-thaw was built.•Growth of macropores was found to be responsible for the freeze-thaw damage of sandstones.•The microscopic and macroscopic freeze-thaw damage mechanism of the sandstones were comprehensively revealed.
Although the strength loss of natural stone materials was widely investigated in the previous decades, the change law of pore structure characteristic and their correction with the strength loss under freeze-thaw was not completely understood. In this study, the pore structure change of red sandstone under freeze-thaw was continuously monitored by MIP (mercury intrusion porosimetry). The pore size distribution was characterized by a developed tri-modal exponential function. The characteristic pore radii in this function corresponding to nanopores (d |
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ISSN: | 0950-0618 1879-0526 |
DOI: | 10.1016/j.conbuildmat.2022.127200 |