20.500.12556/DiRROS-16463 Influence of the size and type of pores on brick resistance to freeze-thaw cycles This paper estimates the frost resistance of bricks using the ratio of compressive strength before freezing to compressive strength after freezing to describe the damage degree of bricks being exposed to freeze-thaw cycles. In an effort to find the ratio that clearly distinguishes resistant bricks from non-resistant bricks, the authors attempted to establish the correlation between the ratio and Maage factor as a recognized model for assessing brick resistance. To clarify the degree of damage of individual bricks, the pore size distribution has been investigated by means of mercury porosimetry. Additionally, micro computed X-ray tomography (micro-CT) has been employed to define the influence of the type of pores (open or closed) and their connectivity on the frost resistance of bricks. According to the results, it can be concluded that there is a good correlation between the Maage factor and the ratio of pre- to post-freeze-thaw cycle compressive strengths, and that the latter ratio strongly correlates with the percentage of large pores (≥3 mm) in the brick. If such a correlation could be confirmed in a larger sample, then the ratio of pre- to post-freeze-thaw cycle compressive strengths could be used as a new method for assessing brick resistance to freeze-thaw cycles and it would be possible to determine the minimum percentage of large pores required to ensure the overall resistance of brick to freeze-thaw conditions. The complexity of the problem is, however, evidenced by the fact that no clear connection between the type (open versus closed) or connectivity of pores and the frost resistance of bricks could be revealed by micro-CT. clay masonry units porosity freeze-thaw resistance opečni zidaki poroznost odpornost na zmrzovanje true false true Molecular Diversity Preservation International Angleški jezik Slovenski jezik © 2020 by the authors. Licensee MDPI, Basel, Switzerland. Neznano 2023-04-25 08:23:11 2023-08-17 08:55:05 2023-08-18 03:36:02 0000-00-00 00:00:00 2020 0 0 Nasl. z nasl. zaslona; Opis vira z dne 31. 8. 2020; Št. članka 3717; str. 1-12 iss. 17 Vol. 13 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-08-22 620.1/2 1996-1944 10.3390/ma13173717 26659075 https://www.mdpi.com/1996-1944/13/17/3717 Odprti dostop 1 e5bbec72-e320-11ed-a314-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22174 RAZ_Netinger_Grubesa_Ivanka_2020.pdf RAZ_Netinger_Grubesa_Ivanka_2020.pdf 1 6DD73430E0874132810FD6E0D5A01225 bebc690a7170cd051a5629bb8346dbe0dc1dc4087de4a16bf2b8ebd0e4ab4295 067de9dd-e323-11ed-a314-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22175 RAZ_Netinger_Grubesa_Ivanka_2020.pdf RAZ_Netinger_Grubesa_Ivanka_2020.pdf 1 1E08F64A193E26A9851EA66137F90926 dbcde55ffc009760d4c9c6758ff7148bf7f57dad452a2cb900cc861a8e2eae64 0eafff5d-e323-11ed-a314-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22176 Zavod za gradbeništvo Slovenije 0 0 0