Design of self-compacting concrete with ground granulated blast furnace slag

Dinakar, P.; Sethy, Kali Prasanna; Sahoo, Umesh Chandra

doi:10.1016/j.matdes.2012.06.049

Cited by 185 publications

(71 citation statements)

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“…It was also shown that lower concrete cost is provided when polycarboxylate superplasticizer is used because in that case the required concrete compressive strength and metakaolin efficiency is achieved at lower dosages of the most expensive concrete components. Recent studies demonstrate that using ground granulated blast furnace slag as cement replacement ranging from 20% to 80% replacement, self-compacting concrete with strength of 30-100 MPa could be produced [21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Iqbal¹,

Ali²,

Holschemacher³

et al. 2016

Period. Polytech. Civil Eng.

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IntroductionAs known, self-compacting concrete (SCC) is highly flowable, non-segregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcement without any mechanical consolidation. It doesn't require any vibration for compaction and can flow through narrow spaces without segregation and excessive bleeding [1]. Therefore SCC is one of the greatest innovations of concrete technology. It was introduced in construction industry in early 1990s. Similar to the normal vibrated concrete (NVC), SCC mixtures consist of aggregate, cement, water, admixtures and some mineral additions. Unlike NVC, SCC has high quantity of fillers (eg. silica fume, fly ash, limestone powder etc.) and superplasticizer (high-range water reducing admixture) added to improve its flowing property.As SCC flows under its own weight without or very little use of vibration, it results in saving a lot of labor effort and bring economy to the concreting. Moreover, it can also flow through narrow and complex geometries where the use of vibrator is almost impossible.Use of SCC in construction industry is getting more and more popularity all over the world because of inherited advantages and studies on its hardened properties. SCC can be classified mainly into 3 different types [2]:• powder type;• viscosity type and • combination type The first type has a high amount of powder (all material <0.15 mm) ranging from 550-650 kg/m 3 , which provides the plastic viscosity and thus resistance to segregation whereas the yield point is determined by the addition of suitable superplasticizers. In the second type there is less powder content ranging from 350-450 kg/m 3 . In this type additional minerals or fillers are not used for segregation resistance. An admixture called viscosity modifying agent (VMA) is used to control the segregation, while yield point is controlled by the superplasticizer. The third type has a powder content of 450-550 kg/m 3 , but additionally rheology is controlled by the use of appropriate dosage of VMA and superplasticizer.

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Section: Introductionmentioning

confidence: 99%

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Iqbal¹,

Ali²,

Holschemacher³

et al. 2016

Period. Polytech. Civil Eng.

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“…Self compactability cannot be assessed using a single test method, usually requiring more than one method, Dinakar, et al 2013 [27].The present investigation evaluated the self compactability of the designed mix by Slump flow studies for flow ability and segregation resistance and J ring for passing ability. It is well know that fibre affects the characteristics of SCC in the fresh state.…”

Section: Characterization Of Fresh Propertiesmentioning

confidence: 93%

Simplified Mix Design Procedures for Steel Fibre Reinforced Self Compacting Concrete

Basheerudeen¹,

Sivakumar²

2015

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Abstract. The present study focus on the systematic design methodology for producing a self-compacting concrete (SFRSCC) consisting of steel fibre reinforcements. It is intended to achieve a self-consolidating concrete which can yield dual benefit of self-consolidating properties as well as toughness of the composite. Experimental modelling consisted of designing the mortar phase using manufactured sand (M-sand) as fine aggregate using systematic mix design methodology based on particle packing concept. Optimisation of aggregates was arrived based on packing density concept by conducting slump cone studies. Powder combinations consisting of cement and ground granulated blast furnace slag (GGBFS) were selected by conducting paste consistency test. Finally, superplasticizer dosage was fixed based on Marsh cone studies and volume fraction of steel fibres from slump flow studies. The workability of standard and high strength concrete is affected by the inclusion of steel fibre dosage and the fresh properties revealed the importance of maintaining a high paste volume for better flow ability. Based on the proposed mix design methodology with M-sand a high strength self-compacting concrete was achieved upto 70MPa. Experimental investigations were reported on the other assessment made from fresh and hardened properties of designed self-compacting steel fibre concrete mixes. Also, the outcome of test results revealed the possibility of using M-sand as an alternative for complete replacement of river sand.

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“…La mayoría de propuestas se pueden agrupar en cinco categorías [6]: métodos empíricos [7], [8]; basados en la resistencia a compresión [9], [10]; basados en el empaquetamiento de los áridos [11]- [13]; basados en la reología de la pasta [14], [15]; o bien derivados de análisis estadísticos [4], [16].…”

Section: -Introducciónunclassified

Un nuevo enfoque para optimizar dosificaciones de hormigón autocompactante

Linden

García-Taengua

2018

Libro De Comunicaciones / Livro Das Comunicações

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RESUMENTodo procedimiento para diseñar hormigones autocompactantes comprende dos etapas: la aplicación de un método de dosificación, y el ajuste de la mezcla mediante amasadas de prueba. Ambas se centran en el comportamiento del hormigón en estado fresco, buscándose maximizar tres propiedades fundamentales: fluidez, capacidad de llenado, y estabilidad. Este estudio propone formular matemáticamente el comportamiento en fresco del hormigón autocompactante como un fenómeno multivariado. Este nuevo enfoque posibilita una optimización más robusta de los hormigones autocompactantes. Con esta finalidad, se ha llevado a cabo un metanálisis de cerca de trescientas dosificaciones recogidas de distintas fuentes, abarcando: las propiedades de los materiales utilizados y sus cantidades relativas; los resultados de los ensayos de escurrimiento, embudo en V, anillo en J, caja en L, e índice visual de segregación; y la resistencia media a compresión simple. Se han estudiado las relaciones de codependencia entre los distintos parámetros medibles, y cómo estas relaciones se ven afectadas por cambios en la dosificación.PALABRAS CLAVE: dosificación, optimización, resistencia, segregación. 1.-INTRODUCCIÓNLas dosificaciones de hormigón autocompactante (HAC) buscan tres características fundamentales: capacidad de llenado, capacidad de paso, y estabilidad. La capacidad de llenado se puede modificar fácilmente con aditivos superplastificantes, pero asegurar al mismo tiempo un nivel adecuado de capacidad de llenado y estabilidad es más complejo. La capacidad de paso depende en gran medida del contenido en áridos y su tamaño máximo, además de su granulometría y la cohesión de la mezcla [1], [2]. La estabilidad puede medirse a través del índice visual de segregación o VSI [3], depende de la cohesión de la mezcla y de su viscosidad [4], que no debe verse reducida en exceso para evitar que la mezcla presente tendencia a segregar. El incremento del contenido en finos, mediante la incorporación de filler o adiciones activas, contribuye a una mayor cohesión. La adición de reguladores de la viscosidad es una estrategia complementaria a las anteriores al compensar 167

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Design of self-compacting concrete with ground granulated blast furnace slag

Cited by 185 publications

References 10 publications

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Simplified Mix Design Procedures for Steel Fibre Reinforced Self Compacting Concrete

Un nuevo enfoque para optimizar dosificaciones de hormigón autocompactante

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