20.500.12556/DiRROS-20211 Lightweight aggregates made from fly ash using the cold-bond process and their use in lightweight concrete Lahki agregati izdelani iz elektrofiltrskega pepela s postopkom hladnega vezanja in njihova uporaba za lahke betone Aggregates made from fly ash have been developed by means of the cold-bonding process, with the addition of Portland cement as a binder at (10, 20, and 30) % of mass fractions, and by pouring the mixtures into moulds. After curing for 28 d the samples were processed into aggregate by crushing and sieving. An aggregate containing a weight percentage of 10 % of cement was additionally produced by pelletization on a granulating plate. The density, water-adsorption capacity, porosity, compressive strengths, and frost resistance of the samples were determined. The aggregates prepared by both routes were then used to make concrete samples, whose properties were then compared to those of conventional concrete made using limestone aggregate. The compressive strength of the concrete made with the granulated aggregate reached 16.0 MPa after 28 d, whereas that of the concrete made with crushed aggregate amounted to 24.1 MPa, and that of the conventional concrete was 34.6 MPa. Agregati izdelani iz elektrofiltrskega pepela so bili razviti s postopkom hladnega vezanja, z dodatkom (10, 20 in 30) % masnega deleža Portland cementa kot veziva in z ulivanjem mešanice v modele. Po 28 dnevnem strjevanju vzorcev so bili vzorci predelani v agregat z drobljenjem in sejanjem. Sestava, ki je vsebovala 10 masnih % cementa, je bila še dodatno peletizirana na plošči za granuliranje. Določene so bile: gostota, kapaciteta absorpcije vode, poroznost, tlačna trdnost in odpornost na zamrzovanje. Sestave, izdelane na oba načina, so bile uporabljene za izdelavo betonskih vzorcev, katerih lastnosti so bile primerjane z lastnostmi običajno izdelanega betona z uporabo sestave apnenca. Tlačna trdnost betona, izdelanega z granulirano sestavo, je dosegla 16,0 MPa po 28 dneh, medtem, ko je pri betonu izdelanem iz drobljenega agregata, znašala 24,1 MPa, pri običajnem betonu pa je bila 34,6 MPa. fly ash lightweight aggregates density compressive strength frost resistance elektrofiltrski pepel lahki agregati gostota tlačna trdnost odpornost na zamrzovanje true false true Inštitut za kovinske materiale in tehnologije Angleški jezik Slovenski jezik © MATERIALI IN TEHNOLOGIJE Neznano 2024-08-14 13:04:07 2024-08-14 13:18:48 2024-08-16 03:57:15 0000-00-00 00:00:00 2017 0 0 str. 267-274 št. 2 Letn. 51 mar.-apr. 2017 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2017-04-19 67.017:666.96:620.173 1580-2949 10.17222/mit.2015.337 8049505 frankovic.pdf frankovic.pdf 1 A6802ACCC3F6337DBBA304AD80DAB72C d2ce4d4451593086832b4c6dd6af09251c28c1d6d02769e8f3978fa9fe743137 2ef283df-5a1c-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28296 https://doi.org/10.17222/mit.2015.337 0 141c4866-5a1e-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28297 Zavod za gradbeništvo Slovenije 0 0 0