Influence of particle size on the early hydration of slag particle activated by Ca(OH)2 solution

Zhijun Tan; Geert De Schutter; Guang Ye; Yun Gao; Lieven Machiels

doi:10.1016/j.conbuildmat.2013.11.073

Influence of particle size on the early hydration of slag particle activated by Ca(OH)₂ solution

Zhijun Tan
, Geert De Schutter
, Guang Ye
, Yun Gao
, Lieven Machiels

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

This paper investigates the influence of slag particle size on its hydration speed at particle level in the early age. Slags were separated with sieves into groups of different size fractions, considering a wide range of sizes. The chemical compositions of each group were analyzed by X-ray Fluorescence (XRF). Activated by 15% Ca(OH)₂ (by mass) at water/powder ratio 1:1, the hydration heat evolution was recorded by isothermal calorimetry up to 84 h and converted to hydration degree. Based on the hydration degrees and particle size distributions, the rate of increase of hydrating layer thickness of each single slag particle (k value) was calculated. Results reveal that k values of coarse particles are higher than that of fine particles. Coarse particles contain higher content of CaO but relatively lower content of MgO, Al₂O₃ and SiO₂, resulting in higher reactivity index of (CaO + Al₂O₃ + MgO)/SiO₂.

Original language	English
Pages (from-to)	488-493
Number of pages	6
Journal	Construction and Building Materials
Volume	52
DOIs	https://doi.org/10.1016/j.conbuildmat.2013.11.073
State	Published - 15 Feb 2014
Externally published	Yes

Keywords

Blast-furnace slag
Hydration degree
Particle size distribution
Reactivity

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10.1016/j.conbuildmat.2013.11.073

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title = "Influence of particle size on the early hydration of slag particle activated by Ca(OH)2 solution",

abstract = "This paper investigates the influence of slag particle size on its hydration speed at particle level in the early age. Slags were separated with sieves into groups of different size fractions, considering a wide range of sizes. The chemical compositions of each group were analyzed by X-ray Fluorescence (XRF). Activated by 15\% Ca(OH)2 (by mass) at water/powder ratio 1:1, the hydration heat evolution was recorded by isothermal calorimetry up to 84 h and converted to hydration degree. Based on the hydration degrees and particle size distributions, the rate of increase of hydrating layer thickness of each single slag particle (k value) was calculated. Results reveal that k values of coarse particles are higher than that of fine particles. Coarse particles contain higher content of CaO but relatively lower content of MgO, Al2O3 and SiO2, resulting in higher reactivity index of (CaO + Al2O3 + MgO)/SiO2.",

keywords = "Blast-furnace slag, Hydration degree, Particle size distribution, Reactivity",

author = "Zhijun Tan and \{De Schutter\}, Geert and Guang Ye and Yun Gao and Lieven Machiels",

year = "2014",

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doi = "10.1016/j.conbuildmat.2013.11.073",

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pages = "488--493",

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}

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T1 - Influence of particle size on the early hydration of slag particle activated by Ca(OH)2 solution

AU - Tan, Zhijun

AU - De Schutter, Geert

AU - Ye, Guang

AU - Gao, Yun

AU - Machiels, Lieven

PY - 2014/2/15

Y1 - 2014/2/15

N2 - This paper investigates the influence of slag particle size on its hydration speed at particle level in the early age. Slags were separated with sieves into groups of different size fractions, considering a wide range of sizes. The chemical compositions of each group were analyzed by X-ray Fluorescence (XRF). Activated by 15% Ca(OH)2 (by mass) at water/powder ratio 1:1, the hydration heat evolution was recorded by isothermal calorimetry up to 84 h and converted to hydration degree. Based on the hydration degrees and particle size distributions, the rate of increase of hydrating layer thickness of each single slag particle (k value) was calculated. Results reveal that k values of coarse particles are higher than that of fine particles. Coarse particles contain higher content of CaO but relatively lower content of MgO, Al2O3 and SiO2, resulting in higher reactivity index of (CaO + Al2O3 + MgO)/SiO2.

AB - This paper investigates the influence of slag particle size on its hydration speed at particle level in the early age. Slags were separated with sieves into groups of different size fractions, considering a wide range of sizes. The chemical compositions of each group were analyzed by X-ray Fluorescence (XRF). Activated by 15% Ca(OH)2 (by mass) at water/powder ratio 1:1, the hydration heat evolution was recorded by isothermal calorimetry up to 84 h and converted to hydration degree. Based on the hydration degrees and particle size distributions, the rate of increase of hydrating layer thickness of each single slag particle (k value) was calculated. Results reveal that k values of coarse particles are higher than that of fine particles. Coarse particles contain higher content of CaO but relatively lower content of MgO, Al2O3 and SiO2, resulting in higher reactivity index of (CaO + Al2O3 + MgO)/SiO2.

KW - Blast-furnace slag

KW - Hydration degree

KW - Particle size distribution

KW - Reactivity

UR - https://www.scopus.com/pages/publications/84890471296

U2 - 10.1016/j.conbuildmat.2013.11.073

DO - 10.1016/j.conbuildmat.2013.11.073

M3 - 文章

AN - SCOPUS:84890471296

SN - 0950-0618

VL - 52

SP - 488

EP - 493

JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

Influence of particle size on the early hydration of slag particle activated by Ca(OH)₂ solution

Abstract

Keywords

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