Durability properties of ladle slag geopolymer mortar based on fly ash
This paper presents the results of tests of physical-mechanical, durability and microscopic properties of geopolymer mortar mixtures based on fly ash and ladle slag. The mixtures are alkali-activated using sodium silicate and sodium hydroxide solution. Firstly, the effects of different fly...
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International Institute for the Science of Sintering, Beograd
2020-01-01
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doaj-ea262a3a7dd34f009c41312d86aa665b2020-11-25T03:31:52ZengInternational Institute for the Science of Sintering, BeogradScience of Sintering0350-820X1820-74132020-01-0152223124310.2298/SOS2002231B0350-820X2002231BDurability properties of ladle slag geopolymer mortar based on fly ashBijeljić Jelena0Ristić Nenad1Grdić Zoran2Topličić-Ćurčić Gordana3Đorđević Dragan4College of Applied Technical Science, Niš, SerbiaFaculty of Civil Engineering and Architecture, Niš, SerbiaFaculty of Civil Engineering and Architecture, Niš, SerbiaFaculty of Civil Engineering and Architecture, Niš, SerbiaFaculty of Sciences and Mathematics, Niš, SerbiaThis paper presents the results of tests of physical-mechanical, durability and microscopic properties of geopolymer mortar mixtures based on fly ash and ladle slag. The mixtures are alkali-activated using sodium silicate and sodium hydroxide solution. Firstly, the effects of different fly ash (class „F“) particle sizes on the characteristics of the mortar mixtures were examined when binder and alkali activator were cured at 95ºC for 24 h, also pozzolanic activity and strength activity index were investigated. After that, fly ash ground of optimal particle sizes (0,09 mm) was replaced with ladle slag, 0 to 20% of the mass, the replacement steps being 5%. The specimens having dimensions 4x4x16 cm were then cured in ambient conditions, and the effects of replacement of a part of fly ash with ladle slag were determined by testing water absorption, flexural and compressive strength, freeze-thaw resistance, sulfate attack, ultrasound velocity, FT-IR spectroscopy and leaching of heavy metals. According to the test results of compressive strength resistance of geopolymer mortars exposed to sulfate solution, the mortar made with fly ash and ladle slag showed better resistance to sulfate attack than the mortar made with fly ash only.http://www.doiserbia.nb.rs/img/doi/0350-820X/2020/0350-820X2002231B.pdfgeopolymerparticle sizecuringmechanical propertiesdurability properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bijeljić Jelena Ristić Nenad Grdić Zoran Topličić-Ćurčić Gordana Đorđević Dragan |
spellingShingle |
Bijeljić Jelena Ristić Nenad Grdić Zoran Topličić-Ćurčić Gordana Đorđević Dragan Durability properties of ladle slag geopolymer mortar based on fly ash Science of Sintering geopolymer particle size curing mechanical properties durability properties |
author_facet |
Bijeljić Jelena Ristić Nenad Grdić Zoran Topličić-Ćurčić Gordana Đorđević Dragan |
author_sort |
Bijeljić Jelena |
title |
Durability properties of ladle slag geopolymer mortar based on fly ash |
title_short |
Durability properties of ladle slag geopolymer mortar based on fly ash |
title_full |
Durability properties of ladle slag geopolymer mortar based on fly ash |
title_fullStr |
Durability properties of ladle slag geopolymer mortar based on fly ash |
title_full_unstemmed |
Durability properties of ladle slag geopolymer mortar based on fly ash |
title_sort |
durability properties of ladle slag geopolymer mortar based on fly ash |
publisher |
International Institute for the Science of Sintering, Beograd |
series |
Science of Sintering |
issn |
0350-820X 1820-7413 |
publishDate |
2020-01-01 |
description |
This paper presents the results of tests of physical-mechanical, durability
and microscopic properties of geopolymer mortar mixtures based on fly ash
and ladle slag. The mixtures are alkali-activated using sodium silicate and
sodium hydroxide solution. Firstly, the effects of different fly ash (class
„F“) particle sizes on the characteristics of the mortar mixtures were
examined when binder and alkali activator were cured at 95ºC for 24 h, also
pozzolanic activity and strength activity index were investigated. After
that, fly ash ground of optimal particle sizes (0,09 mm) was replaced with
ladle slag, 0 to 20% of the mass, the replacement steps being 5%. The
specimens having dimensions 4x4x16 cm were then cured in ambient conditions,
and the effects of replacement of a part of fly ash with ladle slag were
determined by testing water absorption, flexural and compressive strength,
freeze-thaw resistance, sulfate attack, ultrasound velocity, FT-IR
spectroscopy and leaching of heavy metals. According to the test results of
compressive strength resistance of geopolymer mortars exposed to sulfate
solution, the mortar made with fly ash and ladle slag showed better
resistance to sulfate attack than the mortar made with fly ash only. |
topic |
geopolymer particle size curing mechanical properties durability properties |
url |
http://www.doiserbia.nb.rs/img/doi/0350-820X/2020/0350-820X2002231B.pdf |
work_keys_str_mv |
AT bijeljicjelena durabilitypropertiesofladleslaggeopolymermortarbasedonflyash AT risticnenad durabilitypropertiesofladleslaggeopolymermortarbasedonflyash AT grdiczoran durabilitypropertiesofladleslaggeopolymermortarbasedonflyash AT topliciccurcicgordana durabilitypropertiesofladleslaggeopolymermortarbasedonflyash AT đorđevicdragan durabilitypropertiesofladleslaggeopolymermortarbasedonflyash |
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1724571174781845504 |