Experimental study on mix proportion and fresh properties of fly ash based geopolymer for 3D concrete printing

Panda, Biranchi; Tan, Ming Jen

doi:10.1016/j.ceramint.2018.03.031

Cited by 328 publications

(125 citation statements)

References 30 publications

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“…The buildability was evaluated in the context of the mixtures printed as shown in Figure . Shape retention was quantified using a shape retention factor (SRF) defined in Refs (which is also related to yield stress), and it was found that the printable mixtures used in this study showed SRF >0.80, which can be classified as structurally stable.…”

Section: Printer Paste Extrusion and Binder Selection For Extrusmentioning

confidence: 99%

Linking fresh paste microstructure, rheology and extrusion characteristics of cementitious binders for 3D printing

et al. 2019

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Cementitious binders amenable to extrusion-based 3D printing are formulated by tailoring the fresh microstructure through the use of fine limestone powder or a combination of limestone powder and microsilica or metakaolin. Mixtures are proportioned with and without a superplasticizer to enable different particle packings at similar printability levels. A simple microstructural parameter, which implicitly accounts for the solid volume and inverse square dependence of particle size on yield stress can be used to select preliminary material combinations for printable binders. The influence of composition/microstructure on the response of pastes to extension or squeezing are also brought out. Extrusion rheology is used in conjunction with a phenomenological model to better understand the properties of significance in extrusion-based printing of cementitious materials. The extrusion yield stress and die wall slip shear stress extracted from the model enables an understanding of their relationships with the fresh paste microstructure, which are crucial in selecting binders, extrusion geometry, and processing parameters for 3D printing. K E Y W O R D S3D printing, extrusion, microstructure, rheology, wall shear stress, yield stress

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Section: Printer Paste Extrusion and Binder Selection For Extrusmentioning

confidence: 99%

Linking fresh paste microstructure, rheology and extrusion characteristics of cementitious binders for 3D printing

et al. 2019

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“…Biranchi et al proposed a framework of experiment to evaluate mix proportion variation depending on extrudability, shape retention, buildability and thixotropic open time (TOT). Those properties of material are critical at early-age in order to characterize the 3D printable geopolymer [37].…”

Section: State Of the Art And Research Objectivesmentioning

confidence: 99%

Experimental Approach for Printability Assessment: Toward a Practical Decision-Making Framework of Printability for Cementitious Materials

et al. 2019

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The objective of this paper is to propose a pre-experimental framework of printability pre-assessment of cementitious materials. This study firstly presents a general review of additive manufacturing in construction and then examines the main characteristic of the material formulation and printability properties based on extrusion technique. This framework comes with experimental tests to determine a qualitative printability index of mixtures. It uses mix-designs reported in the literature to define interval ratio of mixture design to be investigated in this study. The focus was put on two criteria that influence the formulation namely flowability and buildability. Two practiced based tests, mini slump and cone penetrometer, were used to draw the flowability and buildability dimensionless index. The results were analyzed by introducing an optimal printability coefficient and examining their time evolution. An optimal time of printing was determined Toptimal. Finally, a 3D mortar printing system and its operational process are presented. Then, based on the measurement, the optimal mixture is identified and printed in a large-scale geometry.

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Section: Introductionmentioning

confidence: 95%

“…In particular, the cost of formwork is reduced, because C3DP technology does not need to use formwork [6,7]. The C3DP also improved the buildability, functional integrity, and accuracy of construction [6,7]. Bos et al [8] and Hager et al [9] believed that C3DP could reduce the cost of construction techniques to a great extent.…”

Section: Introductionmentioning

confidence: 99%

The cost calculation method of construction 3D printing aligned with internet of things

Yang

Chung

Chen

et al. 2018

J Wireless Com Network

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It is controversial that the cost of construction 3D printing is lower than the conventional construction in academic field. The reason is that some scholars have confused attributes between construction 3D printing and traditional construction. The cost calculation of construction 3D printing cannot follow the rules in conventional construction because construction 3D printing was identified as both industrial product and construction product. This paper proposed a new approach to cost calculation of construction 3D printing concerning both the properties of industrial and construction product. The cost elements and calculation methods of onsite and offsite 3D printing were discussed and concluded. The comparison of cost composition among conventional construction, onsite construction 3D printing, and offsite construction 3D printing was presented as well. The paper put forward the idea of cost calculation about industrialized construction, and it solved the problems of cost calculation among different construction technologies.

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Experimental study on mix proportion and fresh properties of fly ash based geopolymer for 3D concrete printing

Cited by 328 publications

References 30 publications

Linking fresh paste microstructure, rheology and extrusion characteristics of cementitious binders for 3D printing

Linking fresh paste microstructure, rheology and extrusion characteristics of cementitious binders for 3D printing

Experimental Approach for Printability Assessment: Toward a Practical Decision-Making Framework of Printability for Cementitious Materials

The cost calculation method of construction 3D printing aligned with internet of things

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