Shrinkage Characteristics of Alkali-Activated Slag Cements

Cartwright, Christopher; Rajabipour, Farshad; Radlińska, Aleksandra

doi:10.1061/(asce)mt.1943-5533.0001058

Cited by 159 publications

(108 citation statements)

References 22 publications

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“…It can be seen that the material parameters controlling the calculated strain include the degree of saturation, effective bulk modulus and skeleton modulus (Bentz et al, 1998;Cartwright et al, 2014). Capillary pressure is similar at the same RH according to Kelvin equation (Eq.…”

Section: Discussionmentioning

confidence: 96%

“…For example, Cartwright et al measured the drying shrinkage of AAS mortar of four mixtures under 50% RH, documenting that AAS has significantly higher drying shrinkage, finer pore structure, and lower stiffness than OPC (Cartwright et al, 2014). Collins et al also observed the high shrinkage of AAS and related this phenomena to uniform pore size distribution in AAS (Collins and Sanjayan, 2000).…”

Section: Introductionmentioning

confidence: 94%

“…Many researchers have reported that AAS exhibits significantly higher drying shrinkage than that of OPC (Bakharev et al, 2000;Bakharev et al, 1999;Cartwright et al, 2013aCartwright et al, , 2014Cartwright et al, 2013b;Collins and Sanjayan, 2000;Melo Neto et al, 2008;Shi et al, 2005). For example, Cartwright et al measured the drying shrinkage of AAS mortar of four mixtures under 50% RH, documenting that AAS has significantly higher drying shrinkage, finer pore structure, and lower stiffness than OPC (Cartwright et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…One of the main disadvantages for potential applications of AAS in construction industry is the volumetric instability, i.e. high shrinkage of AAS (Cartwright et al, 2013a(Cartwright et al, , 2014Shi et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Drying Rate on Shrinkage of Alkali-Activated Slag Cements

Cartwright

Rajabipour³

et al. 2014

Proceedings of the 4th International Conference on the Durability of Concrete Structures

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The volumetric instability of alkali-activated slag (AAS) binders has raised concerns and impeded the acceptance of this Portland cement-free material. The objective of present work is to characterize the influence of drying rate on drying shrinkage behavior of alkali-activated slag mortars to better understand the mechanisms responsible for its large shrinkage deformation. A series of four AAS mortar mixtures with varying activator composition, as well as a reference Portland cement mortar was cast and dried at different relative humidities, i.e. 30%, 50%, 70% and 85% RH. Drying took place inside nitrogen purged environmental chambers, for the purpose of eliminating the contribution of carbonation to the total volumetric change of AAS. The shrinkage and corresponding mass loss of 1.27cm ×1.27cm ×12.7cm prisms were measured as a function of time. The results show that shrinkage of AAS varies largely depending on the drying rate, i.e. ambient RH. Interestingly, even though the drying mass loss increases with reducing the RH, the magnitude of shrinkage is the largest for samples stored at 50% and 70% RH, depending on the mixture type. Possible causes of these irregular behaviors are discussed. It is concluded that the drying rate has a much more significant influence on AAS than on OPC, which implies a more complicated shrinkage mechanism for AAS samples stored at various relative humidities.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Drying Rate on Shrinkage of Alkali-Activated Slag Cements

Cartwright

Rajabipour³

et al. 2014

Proceedings of the 4th International Conference on the Durability of Concrete Structures

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“…One of the most common alkali activated aluminosilicate cements containing high calcium ions, is alkali activated slag cement or non-Portland cement (NPC) [4][5][6]. Conventional NPC is prepared from two components: the alkaline solution and an aluminosilicate powder, fly ash, blast-furnace slag (BFS), metakaolin and so on [4,[6][7][8][9][10]. The alkali activation of slag mainly produces calcium silicate hydrate (CSH) gel with low calcium to silica (Ca/Si) ratio [11,12] in which silicon is present in one-dimensional chains with some substitution of Al and Mg for Si and Ca [13].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of one-part non-Portland cement

Abdel‐Gawwad

El-Aleem

Ouda

2016

Ceramics International

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Schwind‐ und Kriechverhalten von Beton auf Basis eines alkalisch‐aktivierten Hüttensands

Dehn

2017

Beton und Stahlbetonbau

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In diesem Beitrag werden die Erkenntnisse einer experimentellen Studie zum Schwind‐ und Kriechverhalten von Beton auf Basis eines alkalisch‐aktivierten Hüttensands (AAS‐Beton) zusammengefasst und mit den für Portlandzement‐Beton bekannten Schwind‐ bzw. Kriechmodellen verglichen. Für den untersuchten AAS‐Beton wurde eine repräsentative Zusammen setzung ausgewählt, die bzgl. des Hüttensandeinflusses einen großen Anwendungsbereich abdeckt und somit grundsätz liche Aussagen und eine Übertragbarkeit bzgl. des Langzeitverformungsverhaltens auch für andere AAS‐Betone zulässt.

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Shrinkage Characteristics of Alkali-Activated Slag Cements

Cited by 159 publications

References 22 publications

Effect of Drying Rate on Shrinkage of Alkali-Activated Slag Cements

Effect of Drying Rate on Shrinkage of Alkali-Activated Slag Cements

Preparation and characterization of one-part non-Portland cement

Schwind‐ und Kriechverhalten von Beton auf Basis eines alkalisch‐aktivierten Hüttensands

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