From soil to printed structures: A systematic approach to designing clay-based materials for 3D printing in construction and architecture

Asaf, Ofer; Bentur, Arnon; Larianovsky, Pavel; Sprecher, Aaron

doi:10.1016/j.conbuildmat.2023.133783

Cited by 10 publications

(2 citation statements)

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“…There is currently no standardized test for the constructability of 3D printing. Asaf [ 27 ] and Chougan [ 51 ] characterized the constructability of 3D printing materials by printing hollow cylinders of different sizes and observing the number of printed layers and printed height, as shown in Figure 14 a. From Figure 14 b, it can be seen that the RS-30 sample collapsed due to upper lateral bending when the number of printed layers reached 47 layers, with a total height of 986.2 mm at the time of failure.…”

Section: Resultsmentioning

confidence: 99%

“…The results showed that the addition of two differently treated clays significantly improved the printability of the geopolymer, with untreated natural clay performing better in terms of shape stability and improved constructability compared to calcined clay. Ofer Asaf et al [ 27 ] used three types of clays and sands of different particle sizes as raw materials for 3D printing and evaluated the rheological and printing performance of 12 sand–clay geopolymers. This study found that a coarser particle size distribution could increase the static yield strength of geopolymer mortars.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Residue Soil on the Properties of Fly Ash–Slag-Based Geopolymer Materials for 3D Printing

Zhou,

Geng,

Jin

et al. 2024

Materials

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This study investigates the impact of residue soil (RS) powder on the 3D printability of geopolymer composites based on fly ash and ground granulated blast furnace slag. RS is incorporated into the geopolymer mixture, with its inclusion ranging from 0% to 110% of the combined mass of fly ash and finely ground blast furnace slag. Seven groups of geopolymers were designed and tested for their flowability, setting time, rheology, open time, extrudability, shape retention, buildability, and mechanical properties. The results showed that with the increase in RS content, the fluidity of geopolymer mortar decreases, and the setting time increases first and then decreases. The static yield stress, dynamic yield stress, and apparent viscosity of geopolymer mortar increase with the increase in RS content. For an RS content between 10% and 90%, the corresponding fluidity is above 145 mm, and the yield stress is controlled within the range of 2800 Pa, which meets the requirements of extrusion molding. Except for RS-110, geopolymer mortars with other RS contents showed good extrudability and shape retention. The compressive strength of 3D printing samples of geopolymer mortar containing RS has obvious anisotropy.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%