Effect of mixing method on the performance of alkali-activated fly ash/slag pastes along with polycarboxylate admixture

Yazan Alrefaei; Yan-Shuai Wang; Jian-Guo Dai

doi:10.1016/j.cemconcomp.2020.103917

Author(s)

Yazan Alrefaei
Yan-Shuai Wang
Jian-Guo Dai

Detail(s)

Original language	English
Article number	103917
Journal / Publication	Cement and Concrete Composites
Volume	117
Online published	3 Jan 2021
Publication status	Published - Mar 2021
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.cemconcomp.2020.103917 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85098845825&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(f76a374a-c885-43e3-a014-65d76f1a2548).html

Abstract

The addition sequence of raw materials during mixing is one factor that affects the fresh and hardened properties of ordinary Portland cement (OPC). Similar to OPC, the properties of alkali-activated materials (AAMs) may be susceptible to the mixing procedure, yet the mixing procedure's effect is still unclear. This research aims to investigate how different mixing procedures affect the fresh and hardened properties of the Na₂SiO₃-anhydrous alkali-activated materials along with polycarboxylate superplasticizer. Besides, a new mixing method named “hybrid-mixing” is proposed, evaluated, and compared with the conventional one-part (1 GP) and two-part (2 GP) mixing methods. It was found that the mixing procedure markedly affects the fresh and hardened properties of AAMs without changing their chemical composition. Compared with 1 GP and 2 GP binders, the hybrid-mixed binders achieved a relatively better slump-flow and compressive strength. The mechanisms governing different mixing methods are further discussed. © 2021 Elsevier Ltd.

Research Area(s)

Admixtures, Alkali-activated materials (AAMs), Alkaline activator, Mechanical properties, Slump flow, Workability

Citation Format(s)

[ RIS ] [ BibTeX ]

Effect of mixing method on the performance of alkali-activated fly ash/slag pastes along with polycarboxylate admixture. / Alrefaei, Yazan; Wang, Yan-Shuai; Dai, Jian-Guo.
In: Cement and Concrete Composites, Vol. 117, 103917, 03.2021.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Alrefaei, Y, Wang, Y-S & Dai, J-G 2021, 'Effect of mixing method on the performance of alkali-activated fly ash/slag pastes along with polycarboxylate admixture', Cement and Concrete Composites, vol. 117, 103917. https://doi.org/10.1016/j.cemconcomp.2020.103917

Alrefaei, Y., Wang, Y.-S., & Dai, J.-G. (2021). Effect of mixing method on the performance of alkali-activated fly ash/slag pastes along with polycarboxylate admixture. Cement and Concrete Composites, 117, Article 103917. https://doi.org/10.1016/j.cemconcomp.2020.103917

Alrefaei Y, Wang YS, Dai JG. Effect of mixing method on the performance of alkali-activated fly ash/slag pastes along with polycarboxylate admixture. Cement and Concrete Composites. 2021 Mar;117:103917. Epub 2021 Jan 3. doi: 10.1016/j.cemconcomp.2020.103917

Alrefaei, Yazan ; Wang, Yan-Shuai ; Dai, Jian-Guo. / Effect of mixing method on the performance of alkali-activated fly ash/slag pastes along with polycarboxylate admixture. In: Cement and Concrete Composites. 2021 ; Vol. 117.