One-part alkali-activated materials : a review

By T. Luukkonen, Z. Abdollahnejad, J. Yliniemi, Paivo Kinnunen, M. Illikainen. 2018

1,257 citations recorded by the source corpus.

Abstract Alkali-activated materials (AAM) are recognized as potential alternatives to ordinary Portland cement (OPC) in order to limit CO2 emissions as well as beneficiate several wastes into useful products. However, the alkali activation process involves concentrated aqueous alkali solutions, which are corrosive, viscous, and, as such, difficult to handle and not user friendly. Consequently, the development of so-called one-part or “just add water” AAM may have greater potential than the conventional two-part AAM, especially in cast-in-situ applications. One-part AAM involves a dry mix that consists of a solid aluminosilicate precursor, a solid alkali source, and possible admixtures to which water is added, similar to the preparation of OPC. The dry mix can be prepared at elevated temperatures to facilitate the reactivity of certain raw materials. This review discusses current studies of one-part AAMs in terms of raw materials, activators, additives, mechanical and physical properties, curing mechanisms, hydration products, and environmental impacts.

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

View Paper: https://www.semanticscholar.org/paper/6b3e80c32aaf39a7507afce9d26afa7745b02a77

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Citations in the corpus

Advances in alkali-activation of clay minerals (2020, background): “Recently, there has been a movement towards ‘one-part’ synthesis methods, in which a precursor is prepared such that only water needs to be added in the mixing procedure [90,91].”
Comparison of alkali and silica sources in one-part alkali-activated blast furnace slag mortar (2018, background): “This is, in fact, the first time one-part AAMs have been documented to exceed 100MPa compressive strength, with earlier reported strengths being up to 80MPa at 28 d (an analysis of the existing literaturewas performed in earlier work (Luukkonen et al., 2018)).”
Sulfuric acid resistance of one-part alkali-activated mortars (2018, neutral): “Di ﬀ erent routes to precursors for one-part AAMs have been devised, including calcination or intense grinding of aluminosilicate materials together with alkali-bearing compounds, and dry mixing of (alumino)silicate materials with readily soluble solid activators [23 – 26].”