Journal ArticleDOI
Influence of Slag as Additive on Compressive Strength of Fly Ash-Based Geopolymer
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TLDR
In this paper, slag was utilized as an additive for fly ash-based geopolymers in order to increase the compressive strength of the geopolymer, and the results showed that the addition of slag could generate amorphous products and accelerate the reaction rate of raw materials.Abstract:
Slag was utilized as an additive for fly ash-based geopolymers in this study. It was found that the incorporation of slag could significantly increase the compressive strength of the geopolymer. The compressive strength of geopolymer with 4.0% slag reached 50 and 70 MPa when cured for 14 days at 30 and 70°C , respectively. The mechanism of slag as additive on the enhancement of compressive strength of geopolymer was investigated using X-ray diffractometer (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and mercury intrusion porosimetry (MIP). The XRD and FTIR results showed that the addition of slag could generate more amorphous products and accelerate the reaction rate of raw materials. From XPS results, the decrease of binding energy and a broadening of peaks were observed for Si 2p , Al 2p , and O 1s elements due to the Ca2+ provided by slag. The decrease in binding energy was more favorable to zeolite formation. The results of MIP suggested that the 4% sl...read more
Citations
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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
Effect of GGBFS on setting, workability and early strength properties of fly ash geopolymer concrete cured in ambient condition
Pradip Nath,Prabir Kumar Sarker +1 more
TL;DR: In this paper, a fly ash-based geopolymer concrete for curing in ambient condition can be proportioned for desirable workability, setting time, and compressive strength using ground granulated blast-furnace slag (GGBFS) as a small part of the binder.
Journal ArticleDOI
Influence of calcium compounds on the mechanical properties of fly ash geopolymer pastes.
TL;DR: Addition of calcium compounds as a fly ash substitute improved mechanical properties for the ambient temperature cured samples while decreasing Properties for the 70 degrees C cured samples.
Journal ArticleDOI
Fly ash-based geopolymer: clean production, properties and applications
Xiao Yu Zhuang,Liang Chen,Liang Chen,Sridhar Komarneni,Chun Hui Zhou,Chun Hui Zhou,Chun Hui Zhou,Dong Shen Tong,Dong Shen Tong,Hui Min Yang,Wei Hua Yu,Hao Wang +11 more
TL;DR: In this article, the authors summarized and examined the scientific advances in the preparation, properties and applications of fly ash-based geopolymer and proposed a new green cement based on fly ash.
Journal ArticleDOI
Influence of granulated blast furnace slag on the reaction, structure and properties of fly ash based geopolymer
TL;DR: In this article, the influence of varying amount of ground granulated blast furnace slag (GBFS) on the reaction kinetics has been studied using isothermal conduction calorimetry.
References
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Journal ArticleDOI
Alkali-activated fly ashes: A cement for the future
TL;DR: In this paper, the mechanism of activation of fly ash with highly alkaline solutions is described, and the product of the reaction is an amorphous aluminosilicate gel having a structure similar to that of zeolitic precursors.
Journal ArticleDOI
The coexistence of geopolymeric gel and calcium silicate hydrate at the early stage of alkaline activation
TL;DR: In this paper, the effects of ground granulated blast furnace slag (GGBFS) on the microstructure and mechanical properties of metakaolin (MK) based geopolymers were studied.
Journal ArticleDOI
On the development of fly ash-based geopolymer concrete
TL;DR: In this article, fly ash-based geopolymer concrete was developed to reduce greenhouse gas emissions, and the test results showed the effects of various parameters on the properties of the concrete.
Journal ArticleDOI
Geopolymeric materials prepared using Class F fly ash and elevated temperature curing
TL;DR: In this article, the effect of storing at room temperature before the application of heat on phase composition and phase composition was studied using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and SEM.
Journal ArticleDOI
The effect of composition and temperature on the properties of fly ash- and kaolinite -based geopolymers
TL;DR: In this paper, the relationship between composition and temperature on the final chemical and physical properties of a geopolymer derived from waste materials is investigated and it is shown that the differences in reactivity of source materials, used during the synthesis of waste-based geopolymers, significantly affect the final properties of the material.