Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 8, Pages 6039-6047Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.01.144
Keywords
Autoclaved aerated concrete; Sodium carbonate activated slag; Reaction product; Microstructure; Compressive strength; Environmental impact
Categories
Funding
- Research Program of the Materials Innovation Institute M2i [M81.6.12478]
- Rijkswaterstaat Grote Projecten en Onderhoud
- Graniet-Import Benelux
- Kijlstra Betonmortel
- Struyk Verwo
- Attero
- Rijkswaterstaat Zee en Delta District Noord
- Van Gansewinkel Minerals
- BTE
- V.d. Bosch Beton
- Selor
- GMB
- Icopal
- BN International
- Eltomation
- Knauf Gips
- Kronos
- Joma
- CRH Europe Sustainable Concrete Centre
- Cement BetonCentrum
- Heros
- Inashco
- Keim
- Sirius International
- Boskalis
- NNERGY
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This paper aims to study the suitability of fully replacing cement by sodium carbonate activated slag in producing autoclaved aerated concrete (AAC). The material properties of the product are characterized in terms of green strength development, mechanical properties, pore related properties such as porosity and thermal conductivity, shrinkage and reaction products. The produced alkali-activated slag-based AAC (ASAAC) shows comparable material properties to the designed cement-based reference AAC samples by giving a compressive strength of -25% with raw density of +18%, thermal conductivity of +13% with a porosity of -5% and drying shrinkage of +5.5%. Besides, a relatively higher crystallinity of calcium silicate hydrates and Al incorporation in the chain of C-S-H is observed for ASAAC products. Furthermore, significant reductions in cost, energy consumption and CO2 emission are foreseen.
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