Squeeze flow coupled with dynamic pressure mapping for the rheological evaluation of cement-based mortars

Grandes, Franco A.; Sakano, Victor Keniti; Rego, Andressa C.A.; Cardoso, F. A.; Pileggi, Rafael Giuliano

doi:10.1016/j.cemconcomp.2018.05.016

Cited by 27 publications

(24 citation statements)

References 48 publications

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“…Specifically in cementitious and activated alkali building materials, such as mortars, the study of rheology helps to understand the workability properties [ 44 ]. In the particular case of activated alkali materials, there is a major problem related to this subject.…”

Section: Introductionmentioning

confidence: 99%

Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

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The fresh and rheological properties of alkali mortars activated by blast furnace slag (BFS) were investigated. Consistency tests, squeeze flow, dropping ball, mass density in the hardened state, incorporated air, and water retention were performed. Mortars were produced with the ratio 1:2:0.45 (binder:sand:water), using not only ordinary Portland cement for control but also BFS, varying the sodium content of the activated alkali mortars from 2.5 to 15%. The results obtained permitted understanding that mortars containing 2.5 to 7.5% sodium present a rheological behavior similar to cementitious mortars by the Bingham model. In turn, the activated alkali mortars containing 10 to 15% sodium showed a very significant change in the properties of dynamic viscosity, which is associated with a change in the type of model, starting to behave similar to the Herschel–Bulkley model. Evaluating the properties of incorporated air and water retention, it appears that mortars containing 12.5% and 15% sodium do not have compatible properties, which is related to the occupation of sodium ions in the interstices of the material. Thus, it is concluded that the techniques used were consistent in the rheological characterization of activated alkali mortars.

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Section: Introductionmentioning

confidence: 99%

Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

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“…In this study, 0  is much larger than the plastic viscosity (k), which means that the yield stress is dominant compared to plastic viscosity when controlling the shear viscosity. Secondly, as reported by Grandes et al [44], water was filtrated to the surface of the cementitious material due to the irregular distribution of the pressure across the cross-section of the hose, which lead to a decrease of plastic viscosity (this term k decreases) at the inner surface of the hose during the delivery process. Therefore, the impact of the plastic viscosity on the shear viscosity decreased.…”

Section: The Effect Of Cementitious Materials Rheological Properties ...mentioning

confidence: 99%

Modelling and parameter optimization for filament deformation in 3D cementitious material printing using support vector machine

Liu

Weng

et al. 2020

Composites Part B: Engineering

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“…Highly reinforced systems with extremely high viscosities and yield stresses typically surpass the maximum torque and stress limits on commercially made rheometers and viscometers, either requiring a custom piece of equipment for testing or an alternative method for assessing fluid properties of the composite. For the purpose of assessing the fluid properties of highly reinforced systems, this study has adapted the squeeze flow test, based off the work of Grandes et al (2018) and Toutou et al (2005). Highly reinforced cementitious materials also have unique internal friction due to the variety of shapes and materials used as reinforcement.…”

Section: Squeeze Flowmentioning

confidence: 99%

“…In addition to the rotational rheometer, flow experiments were conducted using a squeeze flow test for highly reinforced compositions (Grandes et al 2018). The squeeze flow samples were tested on an Instron machine with a flat cylindrical head (45.5 mm diameter) and a 50 kN load cell.…”

Section: Herschel-bulkley Modelmentioning

confidence: 99%

4D printing structures for extreme temperatures using metakaolin based geopolymers

Al-Chaar¹,

Brandvold²,

Kozych³

et al. 2023

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Geopolymers (GPs) are a class of amorphous, aluminosilicate-based ceramics that cure at room temperature. GPs are formed by mixing an aluminosilicate source, which is metakaolin in this case, with an alkali activator solution, which can be either sodium or potassium water glass. GPs have attracted interest for use in structural applications over the past few decades because they have superior mechanical properties to ordinary Portland cement (OPC). Additionally, they can tolerate much higher temperatures and produce a fraction of the CO₂ compared to OPC. This project aims to develop geopolymer composites for 4D printing (the fourth dimension being time) and test their mechanical properties. Rheology and the effects of curing in ambient conditions will be evaluated for fresh geopolymer. Freeze-thaw resistance will be evaluated on potentially printable composites for extreme temperature resistance, etc.

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Squeeze flow coupled with dynamic pressure mapping for the rheological evaluation of cement-based mortars

Cited by 27 publications

References 48 publications

Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag

Rheological and the Fresh State Properties of Alkali-Activated Mortars by Blast Furnace Slag

Modelling and parameter optimization for filament deformation in 3D cementitious material printing using support vector machine

4D printing structures for extreme temperatures using metakaolin based geopolymers

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