Konzeptionierung eines praxisorientierten 3D‐Druckverfahrens für den Verbundwerkstoff Stahlbeton (AMoRC)

Claßen, Martin; Claßen, Johannes; Sharma, Rahul

doi:10.1002/best.202000023

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…In addition, the integration of reinforcement is an important research topic. Different approaches either based on nailing layers together [ 17 ], printing the reinforcement in advance [ 2 ], or adding reinforcement simultaneously to the concrete printing [ 18 , 19 , 20 ] have already been investigated.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Hardened 3D Printed Concretes and Mortars—Development of a Consistent Experimental Characterization Strategy

Meurer

Claßen

2021

Materials

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Today, it is already foreseeable that additive manufacturing of mortar and concrete has groundbreaking potential and will revolutionize or at least fundamentally change the way we build. In recent years, 3D concrete printing (3DCP) with extrusion-based deposition methods has been pushed forward by a growing research community. Albeit being regarded one of the most promising innovations in construction industry, a consistent characterization methodology for assessing the constitutive behavior of 3D printed, hardened cementitious materials is missing, so far, which hinders its widespread use in engineering practice. The major objective of this paper is to fill this gap by developing a new experimental framework that can thoroughly describe the mechanical properties of 3D printed cementitious materials. Based on both a review of state-of-the-art test setups and a comprehensive experimental campaign, the present paper proposes a set of easy-to-use experimental methods that allow us to assess flexural, tensile, shear and compressive strength as well as fracture energy of 3D printed concretes and mortars in a reliable and reproducible manner. The experimental results revealed anisotropic material behavior for flexural, tensile, shear and compressive loading. Furthermore, they confirm that interval time (time gap between deposition of subsequent layers) has a crucial effect on investigated material properties leading to a severe reduction in strength and fracture energy for longer interval times.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Hardened 3D Printed Concretes and Mortars—Development of a Consistent Experimental Characterization Strategy

Meurer

Claßen

2021

Materials

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“…The load-bearing behaviour of industrially produced 3D-printed concrete has not yet been investigated in combination with vertically placed textile reinforcement [10]. Therefore, the objective of this work within the CONCR3TEX project is to verify the feasibility of industrial 3D-printed concrete with textile reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Structural Performance of Textile Reinforced 3D-Printed Concrete Elements

Dittel,

Scheurer,

Evers

et al. 2023

Open Conf Proc

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The aim of this study is to verify the industrial feasibility of integrating textile reinforcement into the 3D concrete printing process and to determine the flexural strength of 3D-printed concrete reinforced with alkali-resistant glass textiles. Due to the non-corrosiveness of the textile reinforcement, thin-walled concrete elements are feasible, reducing material consumption by up to 80 percent compared to steel reinforced concrete. The proposed method of the authors aims to combine 3D concrete printing with a single-sided, movable formwork in order to reduce the time-, personnel-, cost- and material-intensive formwork effort. As a first step towards that goal, in this study, a single-sided stable formwork following the printing path is designed and tested for its applicability on an industrial scale. The prototypical implementation of the printing method through a textile reinforcement is tested. For this purpose, test panels reinforced with textiles vertically and horizontally are printed with concrete. The flexural tensile strength of the printed, reinforced elements is investigated in a four-point bending test. Based on the results of the investigations, the requirements for a movable formwork are defined for the industrial application of this study. The movable formwork will replace the formwork frames in the future, so that the 3D concrete printing process can be optimized in a material-saving way and in terms of circular economy.

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“…Zum anderen kann die Bewehrung vor dem Betonieren positioniert und wie in [16] bzw. automatisch wie in [17] vor Ort hergestellt werden. Anschließend kann Beton z.…”

Section: Introductionunclassified

3D‐gedruckte monolithische Stahlbetonwände im CONPrint3D‐reinforced Verfahren

Mechtcherine

Taubert

Müller

et al. 2022

Beton und Stahlbetonbau

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Die Beton‐3D‐Druck‐Technologie entwickelt sich sehr dynamisch und findet zunehmend praktische Anwendung. Die Integration von lastabtragender Bewehrung stellt jedoch weiterhin eine Herausforderung dar. Der vorliegende Aufsatz stellt drei neue Verfahren zur Herstellung von Stahlbetonvollwänden vor, die auf der von den Autoren entwickelten CONPrint3D‐Technologie basieren. Im Einzelnen sind das: 1) das schichtweise Überdrucken von Bewehrungsmatten, die vor eine gedruckte Kernwand gehängt werden, 2) das seitliche additive Füllen eines Bewehrungskorbs sowie 3) das vollautomatische Aufbauen einer Bewehrungsstruktur mit unmittelbar darauffolgendem schichtweisen Umhüllen durch extrudierten Beton. Neben dem aktuellen Forschungsstand und den betontechnologischen Herausforderungen werden maschinenbauliche Entwicklungsansätze und die kalkulatorische Bewertung der neuen Verfahren im Vergleich mit etablierten Bauverfahren präsentiert.

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Konzeptionierung eines praxisorientierten 3D‐Druckverfahrens für den Verbundwerkstoff Stahlbeton (AMoRC)

Cited by 5 publications

References 24 publications

Mechanical Properties of Hardened 3D Printed Concretes and Mortars—Development of a Consistent Experimental Characterization Strategy

Mechanical Properties of Hardened 3D Printed Concretes and Mortars—Development of a Consistent Experimental Characterization Strategy

Structural Performance of Textile Reinforced 3D-Printed Concrete Elements

3D‐gedruckte monolithische Stahlbetonwände im CONPrint3D‐reinforced Verfahren

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