Comparison between rheological models for portland cement pastes

Atzeni, C.; Massidda, L.; Sanna, Ulrico Umberto Maria

doi:10.1016/0008-8846(85)90125-5

Cited by 112 publications

(51 citation statements)

References 9 publications

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“…The downward branch is used to calculate the rheological properties depending on the applied model [24] (see section 4.1 for reasoning). Although various empirical models have been used to fit the flow curve measurements [25][26][27][28][29], the Bingham (Eq. 6) and Herschel-Bulkley (Eq.…”

Section: Steady Flow Properties 32mentioning

confidence: 99%

Measuring Rheological Properties of Cement Pastes: Most common Techniques, Procedures and Challenges

et al. 2017

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The science of rheology is increasingly used to describe the properties of fresh cement paste. Compared to standard workability tests, rheological properties allow for more fundamental investigation, more precise phenomenological description of flow properties and serve as input for numerical simulations. Standard commercially available rheometers are typically used to perform those measurements. However, the results of the measurement depend on the geometry, testing procedure and a number of potential artefacts. This technical letter describes the most common techniques and procedures used to assess the rheological properties of cement paste, as well as challenges during measurements and actions to counter these challenges.

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Section: Steady Flow Properties 32mentioning

confidence: 99%

Measuring Rheological Properties of Cement Pastes: Most common Techniques, Procedures and Challenges

et al. 2017

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“…Atzeni et al (1985) used this model successfully to correlate data obtained by measurements conducted with cone and plate viscometer to describe the theological behavior of cement grout with W/C ranging between 0.30 and 0.45 [13].…”

Section: Herschel-bulkley Modelmentioning

confidence: 96%

Applicability of rheological models to high-performance grouts containing supplementary cementitious materials and viscosity enhancing admixture

Yahia¹,

Khayat

2003

Mat. Struct.

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The knowledge of yield stress and plastic viscosity of cement-based materials is of special interest in various applications, including consolidation grouting, post-tensioning systems, and for numerical simulations. These rheological parameters are generally estimated from the shear stress-shear rate data using an empirical model. Highly pseudoplastic systems may not be adequately modeled using flow models typically used for conventional grouts. This paper summarizes the results of a study undertaken to evaluate the applicability of a number of analytical models to fit experimental data obtained on cement grout. In total, 44 grouts containing silica fume replacements of 1.5%, 3%, and 5%, by mass of cementitious materials, blast furnace slag substitutions of 20% and 40%, and various combinations of high-range water-reducer and viscosity-enhancing admixture were evaluated. All mixtures were prepared with 0.40 water-cementitious material ratio.Test results highlight the difficulties encountered when using conventional models to fit flow data of highly pseudoplastic mixtures of low yield stress. This is true for mixtures incorporating a viscosity-enhancing admixture, especially when combined with low dosage of high-range water-reducer. In general, the HerschelBulkley, Robertson, De Kee, and Casson models were found to be adequate for use with highly pseudoplastic grouts. A new model is proposed to provide better fitting of rheological profiles of highly flowable, yet stable, pseudoplastic mixtures that exhibit particularly low yield stress values. RI~SUME, Les paramktres rhrologiques

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“…As far as Bingham model is adequate to characterize rheological properties of fresh mortar and concrete, characterization of rheological properties of cement paste demands more complex models. It was demonstrated (in Atenzi et al 1985) that rheological properties of cement paste are best described by the following models: Herschel-Bulkley, Robertson-Stiff and Ellis model. At the same time it was stated that Bingham model may be used for characterizing the properties of cement paste only in a narrow range.…”

Section: Rheological Model and Measurements Of Rheological Parametersmentioning

confidence: 99%

Influence of Viscosity Enhancing Agent on Rheology and Compressive Strength of Superplasticized Mortars

Gołaszewski

2009

Journal of Civil Engineering and Management

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To cite this article: Jacek Gołaszewski (2009) Abstract. The results of investigation into the influence of Viscosity Enhancing Agents (VEA) on the rheological properties of mortars, different in cement and superplasticizer properties, are presented and discussed. Rheology results have been evaluated according to the Bingham model, which describes the rheology with 2 parameters: yield value and plastic viscosity. Rheological parameters were measured using Two-Point Workability Test (TPWT). Additionally, the influence of VEA on compressive strength of mortars is presented. It was found that effects of VEA addition on rheological properties of mortars, as well as on compressive strength of mortars, significantly depend on cement and superplasticizer properties. Basic relation of influence of VEA on rheological properties and compressive strength of mortars in respect to cement and superplasticizer properties were presented and discussed. It is concluded that addition of VEA influences compatibility between cement and superplasticizer. Because addition of VEA may cause decrease in compressive strength, the assessment of compatibility of VEA -cement -superplasticizer system should be performed in relation not only to rheological properties, but also to compressive strength.

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Comparison between rheological models for portland cement pastes

Cited by 112 publications

References 9 publications

Measuring Rheological Properties of Cement Pastes: Most common Techniques, Procedures and Challenges

Measuring Rheological Properties of Cement Pastes: Most common Techniques, Procedures and Challenges

Applicability of rheological models to high-performance grouts containing supplementary cementitious materials and viscosity enhancing admixture

Influence of Viscosity Enhancing Agent on Rheology and Compressive Strength of Superplasticized Mortars

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