Rheological parameters, thixotropy and creep of 3D-printed calcium sulfoaluminate cement composites modified by bentonite

Chen, Mingxu; Бо, Лю; Li, Laibo; Cao, Lidong; Huang, Yongbo; Wang, Shoude; Zhao, Piqi; Lu, Lingchao; Cheng, Xin

doi:10.1016/j.compositesb.2020.107821

Cited by 145 publications

(33 citation statements)

References 39 publications

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“…In this regard, several studies focused on developing 3D printable mixtures with alkali-activated binder systems [90,93,95,99,103,108,109,117,[150][151][152][196][197][198][199], calcium sulfoaluminate cements [128,142,200,201], limestone clay calcined cements [51,[202][203][204], and magnesium potassium phosphate cements [205,206]. However, there are challenges in designing printable concretes with binder systems such as limestone calcined clay due to chemical admixture compatibility issues [207,208]. Another way of reducing the environmental impact is by using recycled aggregates from construction waste.…”

Section: Sustainabilitymentioning

confidence: 99%

Extrusion-based concrete 3D printing from a material perspective: A state-of-the-art review

Mohan

Rahul

Schutter

et al. 2021

Cement and Concrete Composites

239

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Section: Sustainabilitymentioning

confidence: 99%

Extrusion-based concrete 3D printing from a material perspective: A state-of-the-art review

Mohan

Rahul

Schutter

et al. 2021

Cement and Concrete Composites

239

View full text Add to dashboard Cite

“…Torque values are plotted against the rotation speed of the shear vane to obtain a flow curve plot [ 43 ]. Thixotropy can be measured by using the constant shear rate test [ 44 , 45 ], hysteresis loop test [ 46 ], and reflocculation test [ 36 ]. The structuration rate has been measured by conducting stress growth tests at different time intervals before setting the concrete [ 36 , 38 ].…”

Section: Rheologymentioning

confidence: 99%

“…On the contrary, if stiff concrete with high yield stress and viscosity is used for attaining shape retention and high buildability, then it will increase the required pumping power, and extrusion through the nozzle will be difficult [ 49 ]. Table 1 summarizes the range of static yield stress, and Table 2 summarizes the range of dynamic yield stress and plastic viscosity values for various printable concrete mixes reported in the literature [ 29 , 36 , 38 , 40 , 44 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 ]. Table 1 shows that reported values of static yield stress for printable mixes lie as low as 0.16 kPa for calcium sulfoaluminate cement paste ink [ 54 ] and as high as 6.8 kPa for stiff mixes of nano-clay containing high volume fly ash mortar [ 56 ].…”

Section: Rheologymentioning

confidence: 99%

3D Concrete Printing: A Systematic Review of Rheology, Mix Designs, Mechanical, Microstructural, and Durability Characteristics

2021

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This paper provides a state-of-the-art report on the up-to-date research on the emerging 3D concrete printing technology from the concrete materials perspective. It reviews the recent research focused on understanding and characterizing the rheological necessities of the concrete printing process and discusses how the researchers are tailoring compatible mix proportions for the 3D concrete printing process by using eco-friendly binders, waste aggregates, chemical admixtures, and nano-additives. This paper systematically evaluates anisotropic behavior in the mechanical properties of printed concrete and establishes an order for anisotropic behavior in the compressive, flexural, and tensile strengths along three different axes (X, Y, and Z axes) of printed concrete. It evaluates the ratio of flexural strength to the compressive strength of printed concrete along the above three axes. This article explains the influence of variation of printing process parameters on the mechanical properties and discusses reinforcement approaches used for increasing structural performance. The microstructure at the interface of adjacent layers and also at the interface of the reinforcement-cement matrix is discussed. The recent research on the durability performance of printed concrete is critically discussed and future research needs for 3D concrete printing are identified in this paper.

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“…Although the sorbitol can increase the Zeta potential value of FA and reduce the fluidity loss of CSA, its effect on the FA-CSA composite system is worth further investigation. Rheology is the science of micro-fluidity of matter, [28][29][30] which can reflect particle flow state and microstructure development of polymer-modified cementbased coating. Based on the analysis of stress-rate curves (Fig.…”

Section: The Selection Of Retardermentioning

confidence: 99%

Investigation of Compatibility of Fluorine-Acrylic Emulsion and Sulphoaluminate Cement in the Design of Composite Coating: Effects of Sorbitol and Its Mechanism

Chen¹,

Piqi²,

Hou³

et al. 2020

ES Mater.Manuf.

Self Cite

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Both fluorine-acrylic (FA) emulsion and sulphoaluminate cement (CSA) have been proved as satisfactory marine engineering materials, and a better performance can be expected by their combined use. However, their compatibility has rarely been researched. In this study, the effects of sorbitol and its mechanism are investigated by the cement paste fluidity, rheological property, tensile strength, water absorption and scanning electron microscopy (SEM) tests. The results showed that, compared with sodium tripolyphosphate, borax and sodium gluconate, sorbitol can significantly improve the double electric layer of FA, and the absolute value of Zeta potential was increased by 25% compared with the blank sample without any retarder added. With the increase of sorbitol dosage, the fluidity, rheological behavior, tensile strength and water absorption sharply changed first and then tended to be stable after sorbitol dosage reached the optimal dosage of 0.25% for the compatibility improvement. The morphology analysis also proved its advantages, but the more significant improvement can be ensured by a larger polymer to cement ratio (p/c) value. Finally, the mechanism hypothesis is proposed. The film formation rate of the emulsion matches the hydration rate of the cement, due to sorbitol addition.

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Rheological parameters, thixotropy and creep of 3D-printed calcium sulfoaluminate cement composites modified by bentonite

Cited by 145 publications

References 39 publications

Extrusion-based concrete 3D printing from a material perspective: A state-of-the-art review

Extrusion-based concrete 3D printing from a material perspective: A state-of-the-art review

3D Concrete Printing: A Systematic Review of Rheology, Mix Designs, Mechanical, Microstructural, and Durability Characteristics

Investigation of Compatibility of Fluorine-Acrylic Emulsion and Sulphoaluminate Cement in the Design of Composite Coating: Effects of Sorbitol and Its Mechanism

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