{"refrec":{"BRefID":391488,"RR":"<b>Kannikachalam, N.P.; Peralta, P.S.M.; Snoeck, D.; De Belie, N.; Ferrara, L.</b> (2023). Assessment of impact resistance recovery in Ultra High-Performance Concrete through stimulated autogenous self-healing in various healing environments. <i>Cement and Concrete Composites 143</i>: 105239. <a href=\"https://dx.doi.org/10.1016/j.cemconcomp.2023.105239\" target=\"_blank\">https://dx.doi.org/10.1016/j.cemconcomp.2023.105239</a>","BEntID":389235,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Cement and Concrete Composites 143</i>: 105239. <a href=\"https://dx.doi.org/10.1016/j.cemconcomp.2023.105239\" target=\"_blank\">https://dx.doi.org/10.1016/j.cemconcomp.2023.105239</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Kannikachalam, N.P.; Peralta, P.S.M.; Snoeck, D.; De Belie, N.; Ferrara, L.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Kannikachalam, N.P. <i>et al.</i>","Englishabstract":"Ultra High-Performance Concrete (UHPC) is widely acknowledged for its remarkable mechanical properties, owing to its compact microstructure. The response of UHPC to impact forces plays a vital role in ensuring the safety and longevity of structures, specifically in protective buildings, high-performance pavements and offshore concrete structures. In this context, this paper reports on an experimental investigation aimed at assessing the effects of stimulated autogenous self-healing of UHPC on the recovery of its performance under impact loadings. Drop weight tests were performed on UHPC slabs, with a 10 kg heavy impactor dropped from the height of 1 m on the centre of the specimens. Specimens were pre-cracked by repeated impacts up to 40% of their predetermined capacity. Pre-cracked specimens were exposed to different healing conditions, water submersion, 95% ± 5% RH, and wet/dry cycling (12/12 h) either in water or in a NaCl solution. Self-healing was evaluated through rebound height, elastic stiffness recovery, natural frequency, and laser displacement measurements. High-speed cameras and Digital Image Correlation were used to capture rebound height and crack formation. Performance was assessed at time 0, pre-damaging, 1, 2, and 4 months. After the healing period, all specimens were tested to failure. Specimens exhibited an increasing healing efficiency when moving from 95% ± 5% RH, over wet/dry cycling, to submerged conditions. Specimens healed continuously under submerged conditions exhibited a complete closure of surface cracks (50–150 μm) and an 80% recovery in natural frequency. Furthermore, they showed a more than 10% increase in stiffness and energy dissipation capacity after four months of healing.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Assessment of impact resistance recovery in Ultra High-Performance Concrete through stimulated autogenous self-healing in various healing environments","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:32:52.928458","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Self-healing; Impact test; Ultra high-performance concrete; Crystalline admixture; Autogenous self-healing","OtherDescriptors":null,"Notes":null,"AnaPub":2023,"MonPub":null,"DateUpdate":"2024-03-26","DateCreate":"2024-03-26","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:001088214500001","VABBcode":null,"OpenAcc":1,"DOI":"10.1016/j.cemconcomp.2023.105239"},"refs":null,"anarec":{"AnaID":391488,"PubliDate":2023,"Pagination":"105239","XtraPublOfAnaID":null,"ISBN":null,"Volume":"143","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":258827,"SerRR":"Cement and Concrete Composites. 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