Comparison of alkali and silica sources in one-part alkali-activated blast furnace slag mortar

By T. Luukkonen, Z. Abdollahnejad, J. Yliniemi, Paivo Kinnunen, M. Illikainen. Journal of Cleaner Production, 2018

230 citations recorded by the source corpus.

Abstract Alkali-activated materials (AAMs) are one of the alternative low-CO2 binders. One-part AAMs, (that is, mixing a solid precursor with a solid alkali activator and adding water) have recently attracted increasing interest. The purpose of this study is to examine if fast-dissolving solid synthetic sodium metasilicate could be replaced by a combination of sodium hydroxide and slow-dissolving silica derived from rice husk ash or microsilica in the preparation of one-part alkali-activated blast furnace slag mortar. The replacement would improve the carbon footprint and the cost efficiency of the binder. The results demonstrate that silica availability significantly affects compressive strength development as a function of time or mixture composition. The highest compressive strength (107 MPa, 28 d) was obtained with fast-dissolving silica. Furthermore, setting times could be adjusted based on the mix composition, and the durability of mortar remained good after 120 freeze–thaw cycles. The results highlight the overall effect of silica availability on the fresh and hardened properties of one-part AAMs.

Subfields: Building and Construction, Civil and Structural Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/3584494c1fc7791aa4ef7c00e4798a682c777e5c

How researchers see this paper

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In Building and Construction

1. J. Yliniemi
2. T. Luukkonen
3. Janne Pesonen
4. H. Runtti
5. U. Lassi
6. A. Heponiemi

In Civil and Structural Engineering

1. J. Yliniemi
2. T. Luukkonen
3. Janne Pesonen
4. H. Runtti
5. U. Lassi
6. A. Heponiemi

In Materials Chemistry

1. J. Yliniemi
2. T. Luukkonen
3. Janne Pesonen
4. H. Runtti
5. U. Lassi
6. A. Heponiemi

Citations in the corpus

• Application of alkali-activated materials for water and wastewater treatment: a review (2019, background): “…University Consortium Chydenius, University of Jyvaskyla, P.O. Box 567, 67701 Kokkola, Finland properties: for instance, high mechanical strength (Luukkonen et al. 2018), good durability (PachecoTorgal et al. 2012), mesoporous structure (Glad and Kriven 2013), and ion-exchange capacity…”