20.500.12556/DiRROS-15824 Residual compressive behavior of self-compacting concrete after high temperature exposure - influence of binder materials This paper presents an experimental investigation of the compressive behavior of highstrength self-compacting concrete exposed to temperatures up to 600 C. Ten different concrete compositions were tested, in which part of the cement (by weight) was replaced by three different mineral additives (5–15% metakaolin, 20–40% fly ash and 5–15% limestone). The stress–strain curves, compressive strength, modulus of elasticity and strain at peak stress were evaluated from uniaxial compression tests. Scanning electron microscope micrographs were also taken to evaluate the damage caused by the high temperatures. A sharp decrease in mechanical properties and an increase in peak strain were observed already after 200 C for all mixes tested. The different mineral additives used in this study affected the variations of residual compressive strength by 24% and peak strain by 38%, while the variations of residual modulus elasticity were 14%. Comparing the obtained results with the recommendations for compressive strength given in regulatory code EN 1992-1-2 for high strength concrete, it can be concluded that the strength loss observed in EN 1992-1-2 at temperatures up to 400 C is too conservative. The Popovics model for the relationship between stress and strain provided a good approximation for the experimentally determined stress–strain curves at different temperatures. self-compacting concrete mineral additives high temperatures residual mechanical properties open access samorazlivni beton mineralni dodatki visoke temperature zaostale mehanske lastnosti true false true Molecular Diversity Preservation International Angleški jezik Slovenski jezik © 2022 by the authors. Licensee MDPI, Basel, Switzerland Neznano 2022-11-22 10:08:42 2023-04-28 08:51:25 2023-04-29 03:36:37 0000-00-00 00:00:00 2022 0 0 Nasl. z nasl. zaslona; Opis vira z dne 18. 3. 2022; Št. članka 2222; str. 1-24 iss. 6 Vol. 15 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-03-17 620.1/2 1996-1944 10.3390/ma15062222 101518595 https://www.mdpi.com/1996-1944/15/6/2222 1 e2a19695-6a3c-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20932 RAZ_Jelcic_Rukavina_Marija_2022.pdf RAZ_Jelcic_Rukavina_Marija_2022.pdf 1 E9B05A5EB6A862ADDA808D1BF3B0FC50 a5aa98908d7ed55b10c02152a5def1a9402e9b8afb3262cfeadb2ce9d9052710 dbd46a07-81ee-11ed-a484-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21163 Zavod za gradbeništvo Slovenije 0 0 0