Ana Frankovič (Author), Violeta Bokan-Bosiljkov (Author), Vilma Ducman (Author)

Abstract

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.

Keywords

fly ash;lightweight aggregates;density;compressive strength;frost resistance;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FGG - Faculty of Civil and Geodetic Engineering
Publisher: Inštitut za kovinske materiale in tehnologije
UDC: 67.017:666.96:620.173
COBISS: 8049505 Link will open in a new window
ISSN: 1580-2949
Views: 48
Downloads: 67
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Other data

Secondary language: Slovenian
Secondary title: Lahki agregati izdelani iz elektrofiltrskega pepela s postopkom hladnega vezanja in njihova uporaba za lahke betone
Secondary abstract: 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.
Secondary keywords: elektrofiltrski pepel;lahki agregati;gostota;tlačna trdnost;odpornost na zamrzovanje;
Pages: str. 267-274
Volume: ǂLetn. ǂ51
Issue: ǂšt. ǂ2
Chronology: mar.-apr. 2017
DOI: 10.17222/mit.2015.337
ID: 24726868