Contribution of granular interactions to self compacting concrete stability: Development of a new device

Bethmont, Sandrine; Schwartzentruber, L. D'Aloia; Stefani, C.; Tailhan, J.-L.; Rossi, P.

doi:10.1016/j.cemconres.2008.10.007

Cited by 18 publications

(3 citation statements)

References 2 publications

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“…Herschel-Bulkley equation contains three parameters, one of which does not represent a physical entity. It has been shown by de Larrard et al [11] [20], Chidiac and Mahmoodzadeh [21].…”

Section: Introductionmentioning

confidence: 92%

Mathematical Modelling in Placing of Fresh Concrete

Bilgil¹

2011

ENG

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The main problem in working with fresh concrete is the aggregate segregation during filling of formwork. The segregation is strongly related to W/C (Water/Cement) ratio. The fresh concrete is usually considered as a Non-Newtonian fluid since it is a mixture of aggregate, cement and water. The flow behavior of the fresh concrete to W/C ratio plays a crucial role in the quality of the high performance concretes by affecting the flow behaviour of the fresh concrete. The aggregates in the fresh concrete usually cause segregation in the final product depending on the flow condition. In this study, the mechanism of segregation in such systems was theoretically investigated. The mould filling of fresh concrete was numerically investigated and aggregates were considered as Lagrangian particles and segregation was identified from trajectories of such particles. It was found that the aggregates were trapped at the dead zones leading to segregation in the system. The particle size and geometry of the mould was found to have significantly affect the segregation in the system.

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“…Herschel-Bulkley equation contains three parameters, one of which does not represent a physical entity. It has been shown by de Larrard et al [11] [20], Chidiac and Mahmoodzadeh [21].…”

Section: Introductionmentioning

confidence: 92%

Mathematical Modelling in Placing of Fresh Concrete

Bilgil¹

2011

ENG

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“…Self-compacting concrete (SCC) is a type of concrete that achieves uniform compaction solely through gravity, eliminating the need for vibration. It exhibits remarkable flowability, permeability, and resistance to segregation [1]. Owing to its superior performance, SCC finds extensive application in construction projects characterized by limited pouring spaces and intricate steel reinforcement arrangements.…”

Section: Introductionmentioning

confidence: 99%

Properties of High-Content Micro-Steel Fiber Self-Compacting Concrete Incorporating Fly Ash and Slag Powder Performance Study

Yang,

Wang,

Zeng

et al. 2023

Construction Materials

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The addition or substitution of various gel materials in cement-based composites has been proven to be an effective approach in enhancing the performance of concrete. Current research focuses mainly on enhancing the toughness of concrete, but lacks discussion on the performance of alternative gel materials. Therefore, this study aims to explore the effects of partially substituting cement with fly ash and slag powder as gel materials, while incorporating a high volume fraction of micro-steel fibers (6%), on the workability and mechanical properties of self-compacting concrete. By means of rigorous experimental investigation and meticulous analysis, we comprehensively assessed the workability characteristics of self-compacting concrete, encompassing critical aspects such as filling ability, cohesion, and permeability. Additionally, we conducted an extensive evaluation of the mechanical attributes of self-compacting concrete, encompassing vital parameters, such as compressive strength, axial compressive strength, splitting tensile strength, and flexural strength. Last but not least, through a holistic integration of workability and mechanical properties, we conducted a comprehensive performance evaluation of self-compacting concrete incorporating a synergistic blend of fly ash, slag powder, and micro steel fibers. The experimental results indicate that the composite addition of fly ash and slag powder in self-compacting concrete, while compatible with up to 6% micro-steel fibers, leads to a decrease in concrete workability and an increase in cohesiveness due to the addition of micro-steel fibers. Moreover, fly ash predominantly influences the tensile properties of concrete, while the addition of slag powder significantly affects the compressive and flexural properties of concrete. Additionally, the addition of micro-steel fibers significantly improves the overall mechanical properties of concrete.

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“…As shown by Tattersall (1976) the flow of real concrete seems to follow this equation fairly well in most cases. Recently, further research for fresh concrete rheology has been conducted both analitically and experimentally (Safawi et al, 2004;Li, 2007;Leeman and Winnefeld, 2007;Bethmont et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Study of workability of fresh concrete using high range water reducer admixtures

žam

Gouml²,

kccedil³

2012

Int. J. Phys. Sci.

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The main issue in working with fresh concrete is the workability during filling of formwork. One of the problems found in workability is occurence of segregation depending on w/c ratio. Segregation is strongly related to w/c ratio. The fresh concrete is usually considered as a non-Newtonian fluid since it is a mixture of aggregate, cement and water. The flow behaviour of the fresh concrete, a characteristic that is strongly related to w/c ratio, plays a crucial role in the quality of high performance concretes. The aggregates in fresh concrete cause segregation in the final product depending on the flow conditions. In this study, the mechanism of segregation in such a system was theoretically investigated. The mould filling of fresh concrete was numerically investigated and aggregates were considered as Lagrange particles. Segregation was identified from trajectories of such particles. Within this framework, fresh concretes with no admixtures (MC) and those with high range water reducer admixtures (HRWRA) (MCS) were investigated. Minimum agregate segregation in fresh concrete mixtures without HRWRA admixtures was observed to have been higher than in mixtures containing HRWRA admixture.

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Contribution of granular interactions to self compacting concrete stability: Development of a new device

Cited by 18 publications

References 2 publications

Mathematical Modelling in Placing of Fresh Concrete

Mathematical Modelling in Placing of Fresh Concrete

Properties of High-Content Micro-Steel Fiber Self-Compacting Concrete Incorporating Fly Ash and Slag Powder Performance Study

Study of workability of fresh concrete using high range water reducer admixtures

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