Effect of fiber reinforcement on extrudability and buildability of mineral additive modified Portland cement mortars: A rheometer based simulation analysis

Saruhan, Vedat; Keskinateş, Muhammer; Felekoğlu, Kamile Tosun; Felekoğlu, Burak

doi:10.1016/j.jobe.2022.104636

Cited by 7 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar assumptions were made by other researchers [ 46 , 47 ]. In a study by Saruhan et al [ 47 ], it was reported that the shape-retention ability of 3D printable concrete mixtures was calculated by dividing the substrate filament width by the extruder nozzle width. Researchers have stated that the buildability of a mortar mixture increases as the shape retention coefficient approaches 1.…”

Section: Methodssupporting

confidence: 68%

See 1 more Smart Citation

Effect of Silica Fume Utilization on Structural Build-Up, Mechanical and Dimensional Stability Performance of Fiber-Reinforced 3D Printable Concrete

Şahin,

Mardani,

Beytekin

2024

Polymers

View full text Add to dashboard Cite

It is known that 3D printable concrete mixtures can be costly because they contain high dosages of binder and that the drying-shrinkage performance may be adversely affected. Mineral additives and fibers are generally used to control these negative aspects. In this study, the use of silica fume, a natural viscosity modifying admixture, was investigated to improve the rheological and thixotropic behavior of 3D printable concrete mixtures reinforced with polypropylene fiber (FR-3DPC). The effect of increasing the silica fume utilization ratio in FR-3DPC on the compressive strength (CS), flexural strength (FS), and drying-shrinkage (DS) performance of the mixtures was also examined. A total of five FR-3DPC mixtures were produced using silica fume at the rate of 3, 6, 9, and 12% of the cement weight, in addition to the control mixture without silica fume. As a result of the tests, the dynamic yield stress value decreased with the addition of 3% silica fume to the control mixture. However, it was found that the dynamic yield stress and apparent viscosity values of the mixtures increased with the addition of 6, 9, and 12% silica fume. With the increase in the use of silica fume, the CS values of the mixtures were generally affected positively, while the FS and DS behavior were affected negatively.

show abstract

Section: Methodssupporting

confidence: 68%

“…FR-3DPC samples were printed using an injection gun at a printing speed of approximately 5 mm/s. Similar devices and procedures have been used by many researchers [ 47 , 48 ]. The produced samples were kept in a curing cabinet with a temperature of 20 ± 1 °C and a relative humidity of 90 ± 5% immediately after casting.…”

Section: Methodsmentioning

confidence: 99%

Effect of Silica Fume Utilization on Structural Build-Up, Mechanical and Dimensional Stability Performance of Fiber-Reinforced 3D Printable Concrete

Şahin,

Mardani,

Beytekin

2024

Polymers

View full text Add to dashboard Cite

show abstract

“…The use of rheometers to test the rheological parameters can better break the shortcomings of the traditional method of poor measurement accuracy. Hence, it is conductive to effectively analyzing the establishment and destruction of the internal structure of cement paste, and can better reflect the shear rate of cementitious materials, 13 making it easier to record its rheological characteristics scientifically. However, due to the lack of systematic and unified rheological test standards, the results obtained in the test do not match the actual situation.…”

Section: Introductionmentioning

confidence: 99%

Effect of pre–shearing regimes on rheological parameters of cement paste

Feng,

Li,

et al. 2023

J Am Ceram Soc.

View full text Add to dashboard Cite

In rheological testing, different test regimes can result in large differences in the rheological curves, and the pre‐shear procedure is one of the most important parts of the test. In order to investigate the effect of the pre‐shear regime on the rheological properties of cement pastes, an Anton Paar 102 rotary rheometer was used for the test. Two different pre‐shear regimes (RF and CP pre‐shear), three different pre‐shear duration times (50 s, 100 s, 150 s), and four different pre‐shear rates (25 s−1, 50 s−1, 100 s−1) are carried out for the test. The results showed that with the increase of pre‐shear duration or rate, the four rheological parameters (plastic viscosity, yield stress, rheological index, and thixotropy) of the pastes decrease in different degrees. RF pre‐shear was more influenced by shear time, while CP pre‐shear was influenced by shear time and rate. The pre‐shear regimes led to different changes in the flocculation structure of the cement paste, which had a great influence on rheological parameters ultimately. Based on the improved Krieger‐Dougherty model, the effective solid volume fraction of cement paste was calculated. Analysis shows that the phenomenon of “deflocculation” and “re‐flocculation” occurs when the cement paste is subjected to shear action, thus, the pre‐shear regimes destroy the structure of the pastes. With the increase of pre‐shear duration or rate, the effective volume fraction decreased, which indicated that the initial flocculation structure was broken. The greater the damage degree of pre‐shear, the slower the establishment rate of the internal structure of the pastes in dynamic shear, resulting in lower rheological parameters.

show abstract

The Effects of Single and Hybrid Polypropylene Fibers on the Workability and Residual Strength Properties of Concrete Road Pavements Against Freeze–Thaw Cycles

Güler

Akbulut

2023

Arab J Sci Eng

View full text Add to dashboard Cite

Effect of fiber reinforcement on extrudability and buildability of mineral additive modified Portland cement mortars: A rheometer based simulation analysis

Cited by 7 publications

References 20 publications

Effect of Silica Fume Utilization on Structural Build-Up, Mechanical and Dimensional Stability Performance of Fiber-Reinforced 3D Printable Concrete

Effect of Silica Fume Utilization on Structural Build-Up, Mechanical and Dimensional Stability Performance of Fiber-Reinforced 3D Printable Concrete

Effect of pre–shearing regimes on rheological parameters of cement paste

The Effects of Single and Hybrid Polypropylene Fibers on the Workability and Residual Strength Properties of Concrete Road Pavements Against Freeze–Thaw Cycles

Contact Info

Product

Resources

About