Investigation on early hydration of ternary Portland cement-blast-furnace slag–metakaolin blends

Boháč, Martin; Palou, Martin; Novotný, Radoslav; Másilko, Jiří; Všianský, Dalibor; Staněk, Theodor

doi:10.1016/j.conbuildmat.2014.04.018

Cited by 101 publications

(28 citation statements)

References 26 publications

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“…Such mixtures result in a strong cementation matrix which enhances durability [11]. Furthermore, a review of the literature indicates that binary and ternary replacement mixtures have the potential to reduce the rate and amount of heat [13][14][15].…”

Section: Literature Reviewmentioning

confidence: 99%

“…In these studies on SF, a range of water-to-binder ratio between 0.25 and 0.45 is used. Slag is known to reduce heat of hydration, although it is often used at high replacement levels up to 75% [13,15,[19][20][21]. Fly ash is well recognized to provide a slow rate of heat generation and thus is very effective in reducing the heat of hydration [13,14,16,22].…”

Section: Effect Of Scms On Heat Of Hydrationmentioning

confidence: 99%

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Novelties in Material Development for Massive Concrete Structures: Reduction in Heat of Hydration Observed in Ternary Replacement Mixtures

et al. 2018

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As the size of modern infrastructure increases, novelties related to mass concrete mixtures including supplementary cementitious materials (SCMs) become critical. The effects of binary and ternary cement replacement mixtures including metakaolin, silica fume, ground calcium carbonate, granulated blast furnace slag, and fly ash on the rate and amount of heat generated in concrete mixtures are investigated. Twenty three binary and ternary mixtures with a water-to-cementitious binder ratio of 0.43 are evaluated. Between 15% and 45% cement replacement by weight is considered. Results indicate that binary mixtures containing metakaolin or silica fume offer no advantage in reducing the amount of heat but increase compressive strength by 20%. On contrary, ternary mixtures, including two pozzolanic materials, provide 15% reduction in the amount of heat evolution without compromising strength. This reduction is observed regardless of alumina (Al) or silica (Si) content in pozzolanic materials when 45% cement is replaced with a combination of slag and metakaolin, or slag and silica fume. Furthermore, the effect of increased calcium (Ca) content is investigated. It is concluded that ternary mixtures with decreased Ca/(Al+Si) ratio reduce internal temperature in mass concrete structures and are less likely to be exposed to the threshold temperature for delayed ettringite formation.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Effect Of Scms On Heat Of Hydrationmentioning

confidence: 99%

Novelties in Material Development for Massive Concrete Structures: Reduction in Heat of Hydration Observed in Ternary Replacement Mixtures

et al. 2018

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“…In the presence of water, metakaolin (MT) (AS 2 ), which is obtained as a consequence of the calcination of kaolinite-rich clays or soils, goes into reaction with CH and forms calcium alumina hydrate and alumina silicate hydrate crystal structured products (such as C 2 ASH 8 -stratlingite, C 4 AH 13 and C 3 ASH 6 -hydrogarnet) [1][2][3]. White Portland cement, considered indispensable particularly in terms of architectural concrete applications, has a minimum whiteness of 85% since it is produced from raw material of high purity.…”

Section: Introductionmentioning

confidence: 99%

Effect of metakaolin substitution on physical, mechanical and hydration process of White Portland cement

Subaşı

Emiroğlu

2015

Construction and Building Materials

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“…특히 염해저하성과 황산염 저 항성의 증대, 알칼리 실리카 반응의 억제, 장기강도의 증가 등 의 우수한 특성이 발견되었다 (Jones et al, 1997;Kim et al, 2012;Jeong et al, 2015). 또한 기존의 연구결과를 통해 다양 한 노출환경과 미세구조 등에 대한 연구도 많이 이루어지고 있다 (Erdem and Kırca, 2008;Turk, 2012;Boháč et al, 2014;Berodier and Scrivener, 2015). 그러나 전반적으로 TBC의 배 합특성이나 혼화재료의 배합에 따른 내구성에 연구가 집중되 어 있어 상대적으로 자기치유에 대한 연구는 미흡하다.…”

Section: 서 론unclassified

The Effects of Self-Healing for Ternary Blended Cement in Tap-water and Sea-water

Kim¹

2016

Journal of the Korea institute for structural maintenance and i

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The objective of this study is to investigate the self-healing properties of ternary blended cement(TBC) paste made with OPC, GGBFS and FA. The influence of OPC-GGBFS-FA on the self-healing ability of ternary blended cement paste was researched by ultrasonic pulse velocity(UPV) measurement. The TBC paste with GGBFS-FA replacement ratios of 20%, 40% and 60% were prepared having a constant water-cementitious materials ratios os 0.5. The research focuses on behavior after 28days(after loading). Four-point bending tests are used to pre-cracked the prismatic specimens at 28days. For specimens (uncracked and cracked) submerged in tap-water and sea-water until 60days. According to the experimental results, the TBC paste system has self-healing ability increased when the fraction of GGBFS increased. Because GGBFS and FA continues to hydrate after 28days, it is likely that hydrated products from GGBFS and FA may modify microstructures, seal these cracks. From these results, it is clear that the crack in all samples experience self-healing and that this occurs mostly in the first 30days of submerging. Futhermore, most of the healing for both specimens of submerged in sea-water and tap-water occurred during the first 30days. Sea-water submerged specimens healed cracks as fast as those in tap-water. Differences in healing effects of submerged in sea-water and tap-water may be attributed to the presence of specific sea-water ions. Therefore, self-healing effects considered age-effects was more strong effect occurred mostly in the first 30days, and then gradually weaken.

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Investigation on early hydration of ternary Portland cement-blast-furnace slag–metakaolin blends

Cited by 101 publications

References 26 publications

Novelties in Material Development for Massive Concrete Structures: Reduction in Heat of Hydration Observed in Ternary Replacement Mixtures

Novelties in Material Development for Massive Concrete Structures: Reduction in Heat of Hydration Observed in Ternary Replacement Mixtures

Effect of metakaolin substitution on physical, mechanical and hydration process of White Portland cement

The Effects of Self-Healing for Ternary Blended Cement in Tap-water and Sea-water

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