Study on a Method of Obtaining Rheological Coefficients of High-Flow Concrete With Numerical Analysis

Kokado, Takeshi; Hosoda, Takashi; Miyagawa, Toyoaki

doi:10.2208/jscej.2000.648_109

Cited by 9 publications

(8 citation statements)

References 10 publications

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“…Based on the work of Kokado et al [17] and of Roussel and Coussot [16], the yield stress of pastes can be calculated from the mini-slump spread diameter (or radius) when a set of conditions are fulfilled [14]:…”

Section: The Influences Of MIX Design Parametersmentioning

confidence: 99%

“…So, the yield stress (s 0 ) of each paste was calculated according to Eq. 2 [14,16,17], describing the yield stress as a function of the density of the paste q, volume of the mini-slump cone X, and the mini-slump spread diameter R.…”

Section: The Influences Of MIX Design Parametersmentioning

confidence: 99%

“…Minislump test results have previously been quantitatively linked with yield stress values obtained from theory and numerical modelling [16][17][18][19], showing the potential for the mini-slump test method to provide valuable information regarding the yield stress of cementitious pastes. However, there is not yet a standard protocol describing the appropriate procedure for performing mini-slump tests on cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

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Reproducible mini-slump test procedure for measuring the yield stress of cementitious pastes

2017

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The mini-slump test is a fast, inexpensive and widely adopted method for evaluating the workability of fresh cementitious pastes. However, this method lacks a standardised procedure for its experimental implementation, which is crucial to guarantee reproducibility and reliability of the test results. This study investigates and proposes a guideline procedure for mini-slump testing, focusing on the influence of key experimental (mixing and testing) parameters on the statistical performance of the results. The importance of preparation of always testing at the same time after mixing, testing each batch once rather than conducting multiple tests on a single batch of material, is highlighted. A set of alkali-activated fly ash-slag pastes, spanning from 1 to 75 Pa yield stresses, were used to validate the test method, by comparison of calculated yield stresses with the results obtained using a conventional vane viscometer. The proposed experimental procedure for mini-slump testing produces highly reproducible results, and the yield stress calculated from mini-slump values correlate very well with those measured by viscometer, in the case of fresh paste of pure shear flow. Mini-slump testing is a reliable method that can be utilised for the assessment of workability of cements.

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Section: The Influences Of MIX Design Parametersmentioning

confidence: 99%

Section: The Influences Of MIX Design Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reproducible mini-slump test procedure for measuring the yield stress of cementitious pastes

2017

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“…In view of the economy and life loss due to mudflow, the study of its flow behavior is indispensable. Fresh concrete is another example of fluid that flow behavior can be approximated by Bingham fluid constitutive law 3) . The knowledge of the relationship between the rheological properties and flow behavior of fresh concrete is important for the better handling of fresh concrete and to make sure that the formwork is properly filled.…”

Section: Introductionmentioning

confidence: 99%

“…The knowledge of the relationship between the rheological properties and flow behavior of fresh concrete is important for the better handling of fresh concrete and to make sure that the formwork is properly filled. A slump flow test is a common method to investigate the rheological-flow relationship of fresh concrete, and can be treated as a kind of dam-break flow of Bingham fluid with plastic viscosity and yield stress 2), 3) .…”

Section: Introductionmentioning

confidence: 99%

Approximate Solution of Dam-break Flow of Low Viscosity Bingham Fluid

Puay

Hosoda

2011

J. JSCE

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In this study, we investigate the characteristics of dam-break flow of low viscosity Bingham fluid by deriving an approximate solution for the time development of the front position and depth at the origin of the flow. The asymptotic solutions representing the characteristic of Bingham fluid in the limit of low plastic viscosity are verified with a depth-averaged numerical model. Numerical simulations showed that with the decrease of plastic viscosity, the time development of the front position and depth at the origin approach to the theoretical asymptotic solution.

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Analysis of the slump test for on-site yield stress measurement of thickened tailings

Zheng,

Zhao,

Wang

et al. 2024

Case Studies in Construction Materials

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Study on a Method of Obtaining Rheological Coefficients of High-Flow Concrete With Numerical Analysis

Cited by 9 publications

References 10 publications

Reproducible mini-slump test procedure for measuring the yield stress of cementitious pastes

Reproducible mini-slump test procedure for measuring the yield stress of cementitious pastes

Approximate Solution of Dam-break Flow of Low Viscosity Bingham Fluid

Analysis of the slump test for on-site yield stress measurement of thickened tailings

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