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Pore solution composition of alkali-activated slag/fly ash pastes. / Zuo, Yibing; Nedeljkovic, Marija; Ye, Guang.

In: Cement and Concrete Research, Vol. 115, 01.01.2019, p. 230-250.

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@article{f16dd202e7274ffaaf68ccb8afb12ede,
title = "Pore solution composition of alkali-activated slag/fly ash pastes",
abstract = "The pore solutions of a series of hardened alkali-activated slag/fly ash pastes were extracted by the steel-die method, and analyzed using ICP-OES analysis technique. According to the saturation index from thermodynamic calculations, the pore solutions of alkali-activated slag pastes kept oversaturated with respect to solid reaction products with time. In the pore solutions of alkali-activated fly ash pastes, an increase of temperature (from 40 °C to 60 °C) led to decreases of the concentrations of Si, Al, Ca, Na, OH−, K, Fe and Mg, while the soluble silicate in the alkaline activator resulted in increases of the concentrations of these elements. Compared to the alkali-activated slag paste with the same alkaline activator, 50{\%} replacement of slag by fly ash did not result in a substantial change of the pore solution composition. Based on the experimental results, conceptual models were proposed to describe the elemental concentrations in the pore solutions.",
keywords = "Alkali activation, Slag/fly ash, Pore solution, Saturation index, Conceptual models",
author = "Yibing Zuo and Marija Nedeljkovic and Guang Ye",
note = "Accepted Author Manuscript",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.cemconres.2018.10.010",
language = "English",
volume = "115",
pages = "230--250",
journal = "Cement and Concrete Research",
issn = "0008-8846",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Pore solution composition of alkali-activated slag/fly ash pastes

AU - Zuo, Yibing

AU - Nedeljkovic, Marija

AU - Ye, Guang

N1 - Accepted Author Manuscript

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The pore solutions of a series of hardened alkali-activated slag/fly ash pastes were extracted by the steel-die method, and analyzed using ICP-OES analysis technique. According to the saturation index from thermodynamic calculations, the pore solutions of alkali-activated slag pastes kept oversaturated with respect to solid reaction products with time. In the pore solutions of alkali-activated fly ash pastes, an increase of temperature (from 40 °C to 60 °C) led to decreases of the concentrations of Si, Al, Ca, Na, OH−, K, Fe and Mg, while the soluble silicate in the alkaline activator resulted in increases of the concentrations of these elements. Compared to the alkali-activated slag paste with the same alkaline activator, 50% replacement of slag by fly ash did not result in a substantial change of the pore solution composition. Based on the experimental results, conceptual models were proposed to describe the elemental concentrations in the pore solutions.

AB - The pore solutions of a series of hardened alkali-activated slag/fly ash pastes were extracted by the steel-die method, and analyzed using ICP-OES analysis technique. According to the saturation index from thermodynamic calculations, the pore solutions of alkali-activated slag pastes kept oversaturated with respect to solid reaction products with time. In the pore solutions of alkali-activated fly ash pastes, an increase of temperature (from 40 °C to 60 °C) led to decreases of the concentrations of Si, Al, Ca, Na, OH−, K, Fe and Mg, while the soluble silicate in the alkaline activator resulted in increases of the concentrations of these elements. Compared to the alkali-activated slag paste with the same alkaline activator, 50% replacement of slag by fly ash did not result in a substantial change of the pore solution composition. Based on the experimental results, conceptual models were proposed to describe the elemental concentrations in the pore solutions.

KW - Alkali activation

KW - Slag/fly ash

KW - Pore solution

KW - Saturation index

KW - Conceptual models

UR - http://www.scopus.com/inward/record.url?scp=85055725660&partnerID=8YFLogxK

U2 - 10.1016/j.cemconres.2018.10.010

DO - 10.1016/j.cemconres.2018.10.010

M3 - Article

VL - 115

SP - 230

EP - 250

JO - Cement and Concrete Research

T2 - Cement and Concrete Research

JF - Cement and Concrete Research

SN - 0008-8846

ER -

ID: 47289517