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Effect of high volume fly ash and micro-steel fiber on flexural toughness and durability properties in self-compacting lightweight mortar (SCLM)       
Yazarlar
Gökhan Kaplan
Atatürk Üniversitesi, Türkiye
Doç. Dr. Oğuzhan Yavuz BAYRAKTAR Doç. Dr. Oğuzhan Yavuz BAYRAKTAR
Türkiye
Doç. Dr. Selçuk MEMİŞ Doç. Dr. Selçuk MEMİŞ
Kastamonu Üniversitesi, Türkiye
Özet
In this study, high volumes of fly ash and micro-steel fiber were used to improve lightweight aggregate mixes' strength and durability properties that can be used in the prefabrication industry. The developed composite can be used in roof truss flooring of steel structures and bridge decks. Although the unit weight of the mixtures was reduced below 2000 kg/m3, micro steel fibers were used to improve the behaviour against seismic effects. The increase in fly ash content increased the porosity, water absorption, and water penetration depths of the mixes. The increase in the steel fiber content created a micro-filter effect, reducing the water absorption and water penetration depths. The hardened unit weights of the mixes vary between 1305–1723 kg/m3, while their 91-day compressive strength varies between 30.9 and 46.4 MPa. It has been observed that the mixes using steel fiber are in the medium and good class in the residual strength factors specified in ASTM C 1018. The carbonation depth of the mixes using 50% fly ash increased more than 5.5 times compared to the reference mix. After the freeze–thaw effect, spills occurred on the surfaces of the mixes due to fiber corrosion.
Anahtar Kelimeler
Durability | Flexural toughness | High volume fly ash | Pumice aggregate | Sustainability
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı CONSTRUCTION AND BUILDING MATERIALS
Dergi ISSN 0950-0618
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q1
Makale Dili İngilizce
Basım Tarihi 11-2021
Cilt No 307
Sayı 1
Doi Numarası 10.1016/j.conbuildmat.2021.124877
Makale Linki http://dx.doi.org/10.1016/j.conbuildmat.2021.124877