3D concrete printing: A lower bound analytical model for buildability performance quantification

Kruger, Jacques; Zeranka, Stephan; Zijl, Gideon van

doi:10.1016/j.autcon.2019.102904

Cited by 195 publications

(58 citation statements)

References 13 publications

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“…In a recent review article, Mechtcherine et al [14] summarized the progress made in this regard. Some noteworthy mentions are: the methods developed based on Mohr-Coulomb failure criterion, parameterizing the cohesion and angle of internal friction of the material [58][59][60][61][62], and numerical models considering both the plastic yielding and elastic buckling criteria [63][64][65][66][67][68][69][70]. Another possible approach for predicting the failure and deformation during the printing process of cementitious materials is by using three-dimensional rheological models that can accurately describe its mechanical behaviour before and after yielding.…”

Section: Materials Behaviour At Early Agementioning

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: Materials Behaviour At Early Agementioning

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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“…Note that more complex descriptions of the structural build-up kinetic depend on studied timescales [40][41][42][43]. Therefore, in order to predict the penetration force of the nail within the layered structure, it was necessary to account for the gradient of static yield stress.…”

Section: Penetration Of the Nail Within A Printed Samplementioning

confidence: 99%

Nailing of Layers: A Promising Way to Reinforce Concrete 3D Printing Structures

et al. 2020

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Today, the extrusion-based 3D printing of concrete is a potential breakthrough technology for the construction industry. It is expected that 3D printing will reduce the cost of construction of civil engineering structures (removal of formwork) and lead to a significant reduction in time and improve working environment conditions. Following the use of this additive manufacturing layer-wise process, it is required to change the way concrete structures are designed and reinforced, especially for the parts of the structure under tension loads. Indeed, the extrusion-based concrete 3D printing process does not allow for the production of conventional reinforced concrete, and there is a need to develop other ways of compensating for the low mechanical performances of concrete, particularly in tension. In this study, the reinforcement of printed structures by using steel nails through the deposited layers of fresh concrete was investigated. Additionally, three-layer and 10-layer samples were reinforced with nails with varying inclination and spacing. The results show that inclined nails can be used to provide a flexural strengthening of the printing material in different directions.

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“…In this regard, material deformation should be taken into consideration when it comes to printing path design for high geometric accuracy of printed components [90]. Buildability failure by plastic collapse (a strength mechanism) and elastic buckling (a stability mechanism) of printed wall elements has been numerically studied [53,[91][92][93][94][95][96]. During the printing process, the bottom layers have to sustain the gravity-induced stresses from the upper layers.…”

Section: Buildabilitymentioning

confidence: 99%

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

Hojati

et al. 2020

Sustainability

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3D-printing of cementitious materials is an innovative construction approach with which building elements can be constructed without the use of formwork. Despite potential benefits in the construction industry, it introduces various engineering challenges from the material point of view. This paper reviews the properties of extrusion-based 3D-printed cementitious materials in both fresh and hardened states. Four main properties of fresh-state printing materials are addressed: flowability, extrudability, buildability, and open time, along with hardened properties, including density, compressive strength, flexural strength, tensile bond strength, shrinkage, and cracking. Experimental testing and effective factors of each property are covered, and a mix design procedure is proposed. The main objective of this paper is to provide an overview of the recent development in 3D-printing of cementitious materials and to identify the research gaps that need further investigation.

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3D concrete printing: A lower bound analytical model for buildability performance quantification

Cited by 195 publications

References 13 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

Nailing of Layers: A Promising Way to Reinforce Concrete 3D Printing Structures

Fresh and Hardened Properties of Extrusion-Based 3D-Printed Cementitious Materials: A Review

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