PMID- 31979024 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 1996-1944 (Print) IS - 1996-1944 (Electronic) IS - 1996-1944 (Linking) VI - 13 IP - 3 DP - 2020 Jan 22 TI - Physical and Mechanical Properties of HighStrength Concrete Modified with Supplementary Cementitious Materials after Exposure to Elevated Temperature up to 1000 degrees C. LID - 10.3390/ma13030532 [doi] LID - 532 AB - This paper presents the experimental fi ndings of a study on the influence of combining usage of supplementary cementitious materials (SCMs) on the performance of highstrength concrete (HSC) subjected to elevated temperatures. In this study, four types of HSC formulations were prepared: HSC made from cement and fly ash (FA), HSC made from cement and ultrafine fly ash (UFFA), HSC made from cement and UFFAmetakaolin (MK), and HSC made from cement and FAUFFAMK. Mechanical and physical properties of HSC subjected to high temperatures (400, 600, 800, and 1000 degrees C) were studied. Furthermore, the relation between residual compressive strength and physical properties (loss mass, water absorption, and porosity) of HSC was developed. Results showed that the combined usage of SCMs had limited influence on the earlyage strength of HSC, while the 28d strength had been significantly affected. At 1000 degrees C, the residual compressive strength retained 18.7 MPa and 23.9 MPa for concretes containing 30% UFFA5% MK and 10% FA20% UFFA5% MK, respectively. The specimen containing FAUFFAMK showed the best physical properties when the temperature raised above 600 degrees C. Combined usage of SCMs (10% FA20% UFFA5% MK) showed the lowest mass loss (9.2%), water absorption (10.9%) and porosity (28.6%) at 1000 degrees C. There was a strongly correlated relation between residual strength and physical properties of HSC exposed to elevated temperatures. FAU - Zhou, Jianwei AU - Zhou J AD - Building Materials Science Academy of China West Construction Group Co., Ltd, 610213 Chengdu, China. AD - School of Materials Science and Engineering, Xi'an University of Architecture and Technology, 710055 Xi'an, China. FAU - Lu, Dong AU - Lu D AD - School of Materials Science and Engineering, Chang'an University, 710064 Xi'an, China. AD - School of Civil Engineering, Harbin Institute of Technology, 150000 Harbin, China. FAU - Yang, Yuxuan AU - Yang Y AD - School of Materials Science and Engineering, Xi'an University of Architecture and Technology, 710055 Xi'an, China. FAU - Gong, Yue AU - Gong Y AD - School of Materials Science and Engineering, Chang'an University, 710064 Xi'an, China. FAU - Ma, Xudong AU - Ma X AD - School of Materials Science and Engineering, Xi'an University of Architecture and Technology, 710055 Xi'an, China. FAU - Yu, Baoying AU - Yu B AD - Building Materials Science Academy of China West Construction Group Co., Ltd, 610213 Chengdu, China. FAU - Yan, Baobao AU - Yan B AD - School of Materials Science and Engineering, Chang'an University, 710064 Xi'an, China. LA - eng GR - ZJXJ-2019-15/undefined undefined/ PT - Journal Article DEP - 20200122 PL - Switzerland TA - Materials (Basel) JT - Materials (Basel, Switzerland) JID - 101555929 PMC - PMC7040831 OTO - NOTNLM OT - elevated temperature OT - highstrength concrete OT - physical properties OT - relation OT - supplementary cementitious materials COIS- The authors declare no conflict of interest. EDAT- 2020/01/26 06:00 MHDA- 2020/01/26 06:01 PMCR- 2020/01/22 CRDT- 2020/01/26 06:00 PHST- 2019/12/25 00:00 [received] PHST- 2020/01/10 00:00 [revised] PHST- 2020/01/18 00:00 [accepted] PHST- 2020/01/26 06:00 [entrez] PHST- 2020/01/26 06:00 [pubmed] PHST- 2020/01/26 06:01 [medline] PHST- 2020/01/22 00:00 [pmc-release] AID - ma13030532 [pii] AID - materials-13-00532 [pii] AID - 10.3390/ma13030532 [doi] PST - epublish SO - Materials (Basel). 2020 Jan 22;13(3):532. doi: 10.3390/ma13030532.