Journal ArticleDOI
Alkali-activated slag cement and concrete: a review of properties and problems
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In this paper, the authors summarized the advantageous and disadvantageous properties of alkali-activated slag cement and concrete by reviewing previously published work in English, Russian and Chinese, and discussed practical problems and theoretical questions concerning alkaline activation.Abstract:
This paper summarizes the advantageous and disadvantageous properties of alkali-activated slag cement and concrete by reviewing previously published work in English, Russian and Chinese. Practical problems and theoretical questions are discussed. Topics for future work in this field are suggested. The practical problems mentioned are quick setting, the possibility of alkali—aggregate reaction, and the occurrence of efflorescence, shrinkage, microcracks and strength variation. The theoretical questions discussed concerning alkaline activation include the roles of the alkaline anion and cation, the nature of the hydration products, microstructural development and the setting and hardening mechanisms.read more
Citations
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Advances in alternative cementitious binders
TL;DR: In this paper, four promising alternative binders available as alternatives to Portland cement are discussed, namely calcium aluminate cement, calcium sulfoaluminate cements, alkali-activated binders, and supersulfated cements.
Journal ArticleDOI
Alkali-activated materials
TL;DR: In this paper, a brief discussion of the class of cementing materials known as "alkali-activated binders" is provided, which are identified to have potential for utilization as a key component of a sustainable future global construction materials industry.
Journal ArticleDOI
Geopolymers and Related Alkali-Activated Materials
John L. Provis,Susan A. Bernal +1 more
TL;DR: In this paper, the synthesis of alkali-activated binders from blast furnace slag, calcined clay (metakaolin), and fly ash is discussed, including analysis of the chemical reaction mechanisms and binder phase assemblages that control the early-age and hardened properties of these materials.
Journal ArticleDOI
Alkali-activated fly ash/slag cements: Strength behaviour and hydration products
TL;DR: The activation of fly ash/slag pastes with NaOH solutions has been studied in this paper, where the authors established the equations of the models describing the mechanical behaviour of these pastes as a function of the factors and levels considered.
Journal ArticleDOI
Sodium silicate-based, alkali-activated slag mortars: Part I. Strength, hydration and microstructure
A.R Brough,Alan Atkinson +1 more
TL;DR: Alkali activation of ground granulated blast furnace slag with sodium silicate gave clinker-free binders, with high strength and early strength development, although set times were short and somewhat variable as mentioned in this paper.
References
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Journal ArticleDOI
Factors affecting the strength of alkali-activated slag
TL;DR: In this article, the effect of several factors on the strength of alkali activated slags has been investigated, and the optimum range for each factor is suggested through reviewing previous work and their recent results of a full factorial range strength study.
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Microstructure and microanalysis of hardened cement pastes involving ground granulated blast-furnace slag
TL;DR: The microstructure and composition of hardened cement pastes of a wide range of blends of ground granulated blast-furnace slag with ordinary Portland cement have been studied, using techniques of transmission electron microscopy with microanalysis combined with electron microprobe analysis as discussed by the authors.
Journal ArticleDOI
Quantitative characterization of the transition zone in high strength concretes
TL;DR: In this article, the microstructure of the transition zone in high strength concretes, with and without silica fume, was characterized using backscattered electron (bse) imaging combined with quantitative image analysis.
Journal ArticleDOI
Hydration, Structure, and Properties of Blast Furnace SlagCements, Mortars, and Concrete
D. M. Roy,G. M. ldorn +1 more
Journal ArticleDOI
A preliminary study on the alkali activation of ground granulated blast-furnace slag
E. Douglas,J. Brandstetr +1 more
TL;DR: In this article, compressive strength tests of slag mortars indicate that alkali-activated ground granulated blast-furnace slag has potential as a replacement for portland cement in concrete.