Geopolymer Based on Mechanically Activated Air-cooled Blast Furnace Slag

Ilda Tole; Magdalena Rajczakowska; Abeer Humad; Ankit Kothari; Andrzej Cwirzen

doi:10.3390/ma13051134

Geopolymer Based on Mechanically Activated Air-cooled Blast Furnace Slag

Ilda Tole, Magdalena Rajczakowska, Abeer Humad, Ankit Kothari, Andrzej Cwirzen

Luleå tekniska universitet

Research output: Contribution to journal › Article › peer-review

19 Citations (SciVal)

Abstract

An efficient solution to increase the sustainability of building materials is to replace Portland cement with alkali-activated materials (AAM). Precursors for those systems are often based on water-cooled ground granulated blast furnace slags (GGBFS). Quenching of blast furnace slag can be done also by air but in that case, the final product is crystalline and with a very low reactivity. The present study aimed to evaluate the cementitious properties of a mechanically activated (MCA) air-cooled blast furnace slag (ACBFS) used as a precursor in sodium silicate alkali-activated systems. The unreactive ACBFS was processed in a planetary ball mill and its cementing performances were compared with an alkali-activated water-cooled GGBFS. Mixes based on mechanically activated ACBFS reached the 7-days compressive strength of 35 MPa and the 28-days compressive strength 45 MPa. The GGBFS-based samples showed generally higher compressive strength values.

Original language	English
Article number	1134
Journal	Materials
Volume	13
Issue number	5
DOIs	https://doi.org/10.3390/ma13051134
Publication status	Published - 4 Mar 2020

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abstract = " An efficient solution to increase the sustainability of building materials is to replace Portland cement with alkali-activated materials (AAM). Precursors for those systems are often based on water-cooled ground granulated blast furnace slags (GGBFS). Quenching of blast furnace slag can be done also by air but in that case, the final product is crystalline and with a very low reactivity. The present study aimed to evaluate the cementitious properties of a mechanically activated (MCA) air-cooled blast furnace slag (ACBFS) used as a precursor in sodium silicate alkali-activated systems. The unreactive ACBFS was processed in a planetary ball mill and its cementing performances were compared with an alkali-activated water-cooled GGBFS. Mixes based on mechanically activated ACBFS reached the 7-days compressive strength of 35 MPa and the 28-days compressive strength 45 MPa. The GGBFS-based samples showed generally higher compressive strength values.",

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AU - Tole, Ilda

AU - Rajczakowska, Magdalena

AU - Humad, Abeer

AU - Kothari, Ankit

AU - Cwirzen, Andrzej

PY - 2020/3/4

Y1 - 2020/3/4

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AB - An efficient solution to increase the sustainability of building materials is to replace Portland cement with alkali-activated materials (AAM). Precursors for those systems are often based on water-cooled ground granulated blast furnace slags (GGBFS). Quenching of blast furnace slag can be done also by air but in that case, the final product is crystalline and with a very low reactivity. The present study aimed to evaluate the cementitious properties of a mechanically activated (MCA) air-cooled blast furnace slag (ACBFS) used as a precursor in sodium silicate alkali-activated systems. The unreactive ACBFS was processed in a planetary ball mill and its cementing performances were compared with an alkali-activated water-cooled GGBFS. Mixes based on mechanically activated ACBFS reached the 7-days compressive strength of 35 MPa and the 28-days compressive strength 45 MPa. The GGBFS-based samples showed generally higher compressive strength values.

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Geopolymer Based on Mechanically Activated Air-cooled Blast Furnace Slag

Abstract

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