Ground Granulated Blast-Furnace Slag

Matthes, Winnie; Vollpracht, Anya; Villagrán, Yury; Kamali-Bernard, Siham; Hooton, R.D.; Gruyaert, Elke; Soutsos, Marios; Belie, Nele De

doi:10.1007/978-3-319-70606-1_1

Cited by 41 publications

(35 citation statements)

References 79 publications

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“…However, GGBS composition is not the only factor controlling glass structure. Also physical parameters of the production process influence the glass structure, most importantly thermal history, determined mainly by tapping temperature and quenching speed [1,11,14,15,46]. The presence of different elements in the glass network also modifies the dissolution of the glass, the presence of network forming Al, for example increases the dissolution rate, as Al-O-Si sites are more easily attacked at high pH values than Si-O-Si groups [43].…”

Section: Differences In Performance Between Different Ggbsmentioning

confidence: 99%

“…Ground granulated blast furnace slag (GGBS) is a glassy by-product of pig iron production and has been used in blended cements for over 140 years [1]. Besides economic aspects the use of GGBS at high substitution levels has the advantage of lowering CO 2 footprint of concrete, decreasing heat development during setting and increasing physical and chemical resistance of the material [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…However, short term compressive strength development of GGBS is below that of original Portland cement (OPC), but reactivity under same conditions, can differ widely between different GGBS [1,4,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…The intrinsic reactivity of GGBS depends on different parameters as chemical composition, glass content and structure or quenching parameters of the slag [1,9,[11][12][13]. This makes modification of production parameters of GGBS -so called upstream modification -a promising route to increase its reactivity [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…, using formulas 238 commonly found in literature (seeMatthes et al, 2018, for discussion and initial sources[1]). Only 239 the F-value by Ehrenberg (2015) was added[35].…”

mentioning

confidence: 99%

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Ability of the R3 test to evaluate differences in early age reactivity of 16 industrial ground granulated blast furnace slags (GGBS)

Blotevogel¹,

Ehrenberg²,

Steger³

et al. 2020

Cement and Concrete Research

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Ground granulated blast furnace slag (GGBS) is a glassy by-product of pig iron production and is commonly used in concrete industry to replace cement and thereby lower the carbon footprint of the material. Large variations in reactivity exist depending on the GGBS physical and chemical features. Here we investigate the ability of three rapid calorimetric methods to evaluate the reactivity of GGBS. On a set of 16 industrial GGBS, we show that 24h heat release, using the R3protocol, correlates well with 2d compressive strength of standard mortars using 75 wt.-% GGBS. The correlation of R3-test results (R²= 0.87) is better than for traditional reactivity indices calculated from chemical composition. Furthermore, we present data on the repeatability of the test protocol and show that the R3 protocol is very sensitive to sample fineness. Finally, XRD patterns show that slight differences in phase assemblage exist between the most and least reactive GGBS.

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Section: Differences In Performance Between Different Ggbsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…, using formulas 238 commonly found in literature (seeMatthes et al, 2018, for discussion and initial sources[1]). Only 239 the F-value by Ehrenberg (2015) was added[35].…”

mentioning

confidence: 99%

See 3 more Smart Citations

Ability of the R3 test to evaluate differences in early age reactivity of 16 industrial ground granulated blast furnace slags (GGBS)

Blotevogel¹,

Ehrenberg²,

Steger³

et al. 2020

Cement and Concrete Research

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Experimente zur Schwindreduktion von hochfesten Betonbauteilen durch Wärmebehandlung

Stindt

Forman

Mark

2021

Beton und Stahlbetonbau

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Im Beitrag wird die Reduktion des Schwindens von hochfestem Beton durch eine Wärmebehandlung untersucht. Betone werden wärmebehandelt, um die Erhärtung zu beschleunigen und ein frühes Ausschalen zu ermöglichen. Durch eine geeignete Wahl der maximalen Behandlungstemperatur, der Aufheiz‐ und Abkühlrate sollen Schädigungen des Betongefüges minimiert werden. Dies führt zu Wärmebehandlungsdauern von mehr als 24 h, was für eine serielle Fertigung von Betonfertigteilen zu lange ist. Für eine minimal kurze Wärmebehandlung wird auf eine Vorlagerungszeit sowie eine reglementierte Aufheizrate verzichtet, sodass das Aufheizen direkt nach dem Betonieren beginnt. Diese Verkürzung hat Einfluss auf das Schwindverhalten. Es wird hier an Prismen mit und ohne Stahlfasern sowie an Balken mit einem Stabstahlbewehrungsgrad von 1,8 % und 3,1 % untersucht. Alle Proben werden bei 80 °C und 60 % rel. Luftfeuchte für 1, 2, 4, 6 und 24 h wärmebehandelt. Proben ohne Wärmebehandlung dienen als Referenz. Die Ergebnisse zeigen, dass mit zunehmender Wärmebehandlungsdauer die Schwinddehnung deutlich reduziert wird. Sie wird zudem mit zunehmendem Bewehrungsgrad geringer. Um das Schwindverhalten in Abhängigkeit von der Wärmebehandlung zu prognostizieren, werden datenbasierte Antwortflächen abgeleitet und validiert. Dabei steigt die Vorhersagequalität mit zunehmendem Betonalter.

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Application of calorimetry and other thermal methods in the studies of granulated blast furnace slag from the old storage yards as supplementary cementitious material

Nocuń-Wczelik

Pacierpnik²,

Kapeluszna

2021

J Therm Anal Calorim

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The calorimetric and DTA/TG measurements were applied in testing the effect of granulated blast furnace slag originated from the storage yards of different age, added as a supplementary cementing material to the Portland cement clinker. The studies were performed with aim to evaluate the kinetics of cement hydration and the modification of hydrated paste composition in the presence of additive. The material after 20-year storage, the crushed slag after approximately 2-years storage and the new slag from the current production in the metallurgical plant were used. The slag percentage was 5 ÷ 50%. The addition of granulated blast furnace slag stored for a long time affects the standard properties of cement reducing the compressive strength at longer maturing and with the percentage of additive. This is related mainly to the reduction in the vitreous component. However, at the additive content up to 50% the binder complying with the requirements of the relevant European standards for common cements could be produced. Basing on the results of TG measurements the role of calcium carbonate, being the product resulting from the slag weathering process, acting as a grindability and setting/hardening modifying agent, was highlighted.

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Ground Granulated Blast-Furnace Slag

Cited by 41 publications

References 79 publications

Ability of the R3 test to evaluate differences in early age reactivity of 16 industrial ground granulated blast furnace slags (GGBS)

Ability of the R3 test to evaluate differences in early age reactivity of 16 industrial ground granulated blast furnace slags (GGBS)

Experimente zur Schwindreduktion von hochfesten Betonbauteilen durch Wärmebehandlung

Application of calorimetry and other thermal methods in the studies of granulated blast furnace slag from the old storage yards as supplementary cementitious material

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