Digital fabrication of eco-friendly ultra-high performance fiber-reinforced concrete

Arunothayan, Arun R.; Nematollahi, Behzad; Ranade, Ravi; Khayat, Kamal H.; Sanjayan, Jay

doi:10.1016/j.cemconcomp.2021.104281

Cited by 55 publications

(13 citation statements)

References 54 publications

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“…High temperature curing (250 ℃ ~ 400 ℃) can promote the formation of crystalline hydrate and the dehydration of hardened slurry. Arunothayan et al [15] shows that compressive strength of RPC specimens can reach 500MPa after curing at 50MPa and 400 ℃ for 48h. Cheyrezy et al [16] analyzed the micro structure of traditional RPC under thermal curing using thermogravimetric analysis and X-ray diffraction.…”

Section: Mixing and Curing Methodsmentioning

confidence: 99%

“…Arunothayan et al [15] introduced one specific mixing process to obtain printable UHPC mortar: All mixing processes follow the same mixing scheme. Researchers first mix OPC, silica fume and sands, which are dry materials, for 3 min in a 60 L container.…”

Section: Mortar Preparationmentioning

confidence: 99%

“…A gantry-type 3D printer is the most widely-used machine in the study of 3DPC technology. As it is for printing specimens on a table, which means the size and volume of the printer is limited, researchers have adopted an effective workspace of 1.8m(L) x 1.6m(W) x 1.8(H) [15]. While the printer size is basically fixed, its nozzle diameter, which largely influence the printing quality, the printing velocity and the bind between layers of printed specimens, is alternative.…”

Section: Printing Stagementioning

confidence: 99%

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Digital Fabrication and Mechanical Properties of 3D-printing Concrete

Peng¹

2022

HSET

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3d printed concrete technology is a hot research topic in the field of architecture. Printed by layers, the concrete could be stacked accurately in the shape which is digitally designed on computer programs. However, the conventional cement mortar is not suitable for 3D-printing, Because that its aggregate ingredients may cause the cracks in the process of printing. Moreover, the buildability and rheological properties of conventional mortar cannot reach the requirements of 3D-ptinting concrete technology. Ultra-high performance concrete is a developing category of material used in concrete structures and it is considered to be one of the most appropriate printing materials. As the popularization of computer technology, it is a necessary task to research on the digital construction way of concrete structures. And 3D-printing concrete technology combines the popular topics above together. This study mainly introduces the fabrication process of ultra-high performance concrete and digital printing process of 3D-printing concrete, and the mechanical properties of printed specimens are studied by the experimental results.

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Section: Mixing and Curing Methodsmentioning

confidence: 99%

Section: Mortar Preparationmentioning

confidence: 99%

Section: Printing Stagementioning

confidence: 99%

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Digital Fabrication and Mechanical Properties of 3D-printing Concrete

Peng¹

2022

HSET

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“…T he construction materials industry is traditionally one of the most conservative branches of the modern economy, in which the pace of implementation of innovative "green" solutions and the growth of economic efficiency significantly lags behind the average rates demonstrated by the global economy [1][2][3]. The use of man-made waste, the volumes of which are growing every year, can be the driver of innovative development of the global construction industry taking into account the latest global trends in the field of self-healing materials, the use of carbon nanotubes, the development of concrete compositions for 3D printing, and electrically conductive concrete [4][5][6]. Taking into account the obvious needs of the market and the environment for "green" solutions, strategies for the development of the construction materials industry have been adopted in a number of countries [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Carbon-containing modifier for fluoranhydrite binder

Gordina¹,

Gumenyuk²,

Polyanskikh³

et al. 2022

Nanobuild

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Introduction.In order to widen the functionality of construction and building materials and widespread electrically conductive building constructions, it is highly recommended to reduce cost of the solutions. This can be achieved by replacing binders with the industrial by-products. At the same time, there are a few articles about adjustment of electrically conductive properties of materials based on by-product binders and this field is of a great importance. Also, highly dispersed particles in modifiers and their role might be considered as important to find out, especially when such additives are used to improve structure and properties of composites. Methods and materials. To study the possibility of controlling the electrical properties of the matrix, compositions based on fluoroanhydrite, sodium sulfate as a hardening activator, and UPC-MIX-1 suspension as an electrically conductive additive, were made. The effect of UPC-MIX-1 suspension on the electrical performance and structure formation of a mineral matrix containing dispersed carbon black particles was studied. The polydisperse nature of the modifying additive and the ratio of the nanodispersed and microdispersed parts of the solid phase were determined. Indicators for calculating the specific volumetric electrical resistance were determined by the probe method. The influence of the dispersed additive on the characteristics of the fluoroanhydrite composite was evaluated by standard laboratory methods. Features of structure formation were evaluated using the methods of physicochemical analysis. Results and discussion. It was confirmed that a fluoranhydrite-based mineral binder with sodium sulfate has moderate physical mechanical properties and might be used as a substitute for gypsum binder. The usage of an electrically conductive additive as a modifier enhances such mechanical properties as flexural compressive strength and compressive strength which increase by 51% and 65% correspondingly. Also, hydro physical properties have been improved, for instance the coefficient of softening for the FD-4 sample has increased by 39%, and the water absorption by mass for the same sample has decreased by 36%. Specific volume electrical resistance has decreased by 49-52% and equals13,6 kOm • cm, 8% of electrically conductive additive being added. The physical and technical properties of the presented composite are due to significant changes of the physical and chemical properties including the features of structure formation. Conclusions. The obtained compositions require extra optimization in order to be used as a heating component. At the same time, the achieved electrical conductivity is sufficient to level the electrostatic effect of self-leveling floors. Regularities in the formation of the structure of the fluoroanhydrite composite have been established, which manifest themselves in the formation of a larger number of contacts for the intergrowth of crystalline hydrate new formations ensured by the presence of a nanodispersed part in the modifying additive.

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“…Supplementary cementing materials (SCMs) are used to enhance mechanical strength and durability performance, and they also have an influence in the fresh state [13][14][15]. Arunothayan et al [16] studied the use of fly ash (FA) and ground blast furnace slag (BFS) as substitutes in cement for 3DCP. All of the mixtures contained 30% silica fume (SF) as a constant percentage.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Study of the Fresh and Hard Properties of UHPC That Is Used to Produce 3D Printed Mortar

et al. 2022

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Three-dimensional printed concrete (3DPC) is a relatively recent technology that may be very important in changing the traditional construction industry. The principal advantages of its use are more rapid construction, lower production costs, and less residues, among others. The choice of raw materials to obtain adequate behavior is more critical than for traditional concrete. In the present paper a mixture of cement, silica fume, superplasticizer, setting accelerator, filler materials, and aggregates was studied to obtain a 3DPC with high resistance at short curing times. When the optimal mixture was found, metallic fibers were introduced to enhance the mechanical properties. The fresh and hard properties of the concrete were analyzed, measuring the setting time, workability, and flexural and compressive strength. The results obtained demonstrated that the incorporation of fibers (2% in volume) enhanced the flexural and compressive strength by around 163 and 142%, respectively, compared with the mixture without fibers, at 9 h of curing. At 28 days of curing, the improvement was 79.2 and 34.7% for flexural and compressive strength, respectively.

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Digital fabrication of eco-friendly ultra-high performance fiber-reinforced concrete

Cited by 55 publications

References 54 publications

Digital Fabrication and Mechanical Properties of 3D-printing Concrete

Digital Fabrication and Mechanical Properties of 3D-printing Concrete

Carbon-containing modifier for fluoranhydrite binder

Preliminary Study of the Fresh and Hard Properties of UHPC That Is Used to Produce 3D Printed Mortar

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