A self-reinforced cementitious composite for building-scale 3D printing

Soltan, Daniel; Li, Victor C.

doi:10.1016/j.cemconcomp.2018.03.017

Cited by 246 publications

(132 citation statements)

References 19 publications

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“…Geopolymer binder is a brittle material with a relatively low tensile strength and deformation capacity. To rectify these issues, reinforcement is required [1,2]. In particular, the brittleness of these materials results in cracking under tensile and flexural loading [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Basalt Fiber Reinforced Fly Ash-Based Geopolymer Composites

Korniejenko

Mucsi

Halyag

et al. 2020

KEG

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This article analyses the influence of a short basalt fibre admixture on the mechanical properties of geopolymers, especially compressive strength. This preliminary research is the first step towards the development of a composite for fire resistant applications in civil engineering. This study investigates the behaviour of a fly ash based geopolymer containing basalt fibres. Fly ash from the coal power plant ‘Skawina’ (located in: Skawina, Lesser Poland, Poland) was used as the raw material. The chemical composition of this fly ash is typical for class F. Three series of fly ash based geopolymers were cast. In the first, short basalt fibres were added as 1% by weight of fly ash, in the second short basalt fibres were added as 2% by weight of fly ash and the third functioned as a control series without any fibres. Each series of samples were tested on compressive strength after 28, 14 and 7 days, and specimen density was determined. Additionally, microstructural analysis was carried out after 28 days. The results show that the addition of basalt fibres can improve the mechanical properties of geopolymer composites. Keywords: geopolymer, basalt fibre, composites, fire resistance

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Section: Introductionmentioning

confidence: 99%

“…To rectify these issues, reinforcement is required [1,2]. In particular, the brittleness of these materials results in cracking under tensile and flexural loading [1,2]. The challenge is to replace the conventional steel bars traditionally applied in construction industry, through the proper short fibres [3].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Basalt Fiber Reinforced Fly Ash-Based Geopolymer Composites

Korniejenko

Mucsi

Halyag

et al. 2020

KEG

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“…A wide spectrum of concrete mixes have been printed in the past: high strength concrete (e.g., [10]), ultra-high strength concrete (e.g., [19]), fibre-reinforced concrete (e.g., [20,21]), and geo-polymer concrete (e.g., [22,23]). Reported initial yield strength of the concrete printed till date has been in the range of 300 -4,000 Pa [8,11,22,[24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

“…A challenge in printing the SCC, however, is to ensure that a printed layer achieves the capacity to support the layers above in a reasonable time frame. The initial strength gain of the SCC can be accelerated using chemical admixtures (e.g., calcium sulpho-aluminate, calcium chloride, calcium aluminate and sodium sulphate [9,13,21,[32][33][34][35][36][37][38][39]). However, the admixtures may cause choking in the printing set-up due to accelerated setting, lead to expansive hydration reaction [40], produce high heat of hydration [41], and/or have chemicals that can accelerate corrosion in reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing of self-compacting concrete through controlled heating

Shekhar¹,

Kumar²,

Mathur³

2020

Preprint

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Construction using concrete through additive manufacturing is gaining attention. This approach involves a layer-wise deposition of concrete. A layer of printed concrete needs to be ``strong" enough to sustain the weight of layers to be printed above. These layers may not bond well with each other, however. Self-compacting concrete (SCC) may lead to a better bonding, but it may not have sufficient strength. This paper presents a method to print SCC through controlled heating. Properties of printed concrete in fresh and hardened states are studied. Heating leads to a sharp rise in the strength of freshly-printed concrete layers, but a long duration of heating may lead to a reduction in strength of printed concrete after hardening particularly if water-to-cement ratio is small or if loads are applied parallel to the printed layers.

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“…Because of the low resistance and brittle behaviour of traditional concrete in tension, new solutions need to be proposed to fully print complex structures, including areas in tension. Different strategies to reinforce the extruded concrete by adding short fibres or long cable are under development [1][2][3]. Thanks to the alignment of fibres during the extrusion process, this process seems to be efficient and promising.…”

Section: Introductionmentioning

confidence: 99%

Characterisation and modelling of interfacial damage in fibre-reinforced concrete for 3D printing in construction

Ducoulombier

Chateau

Bornert

et al. 2019

Proceedings of the 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Extrusion-based additive manufacturing of cementitious material is a promising technology for the future of construction. Nevertheless, new solutions need to be proposed to provide either ductility or even reinforcement in areas in tension. Using fibres to reinforce the structure made by extrusion seems to be promising and needs to be fully understood at different scales. Moreover, the efficiency of reinforcement depends mainly on the interfacial properties between matrix and fibres. Decohesion between matrix and fibre is studied at two different scales. A mesoscopic analytical mechanical model of a so-called tension stiffening test has been proposed to quantify resistance and friction along the interface from the force-elongation curve. Secondly, the same experimental test is performed inside the microtomography setup of the Anatomix beamline of Synchrotron Soleil permitting to identify the microscopic nature, shape and the evolution of decohesion between matrix and fibres for different loading. Different types of fibres are compared and different damaging mechanisms are observed.

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A self-reinforced cementitious composite for building-scale 3D printing

Cited by 246 publications

References 19 publications

Mechanical Properties of Basalt Fiber Reinforced Fly Ash-Based Geopolymer Composites

Mechanical Properties of Basalt Fiber Reinforced Fly Ash-Based Geopolymer Composites

Additive manufacturing of self-compacting concrete through controlled heating

Characterisation and modelling of interfacial damage in fibre-reinforced concrete for 3D printing in construction

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