Effects of cement mortar characteristics on aggregate-bed 3D concrete printing

Yu, Shiwei; Sanjayan, Jay; Du, Hongjian

doi:10.1016/j.addma.2022.103024

Cited by 5 publications

(2 citation statements)

References 36 publications

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Section: Resultsmentioning

confidence: 99%

“…The shape of destruction, which is probably related to the shape of the tested specimens, imperfections of their interlayers, and the distribution of cork granules in the volume of the specimens, is shown in Figure 8. The relatively low final strength, considering the high amount of cement used in the mixture, might be because the material was not compacted during the process of extrusion, as well as due to the addition of cork, which worked as the weak point in the structure [29,30,45 Figure 6 shows a comparison of the loading graphs plo ed for the early stage of the 3PB tests of the specimens with continuous reinforcement cured at room temperature. Figure 7 shows a comparison of the loading graphs plo ed for the early stage of the tests using the specimens with continuous reinforcement and 25 freeze-thaw cycles.…”

Section: Three-point Bending (3pb) Testmentioning

confidence: 99%

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A 3D Printing Method of Cement-Based FGM Composites Containing Granulated Cork, Polypropylene Fibres, and a Polyethylene Net Interlayer

2023

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The increasing popularity of additive manufacturing technologies in the prototyping and building industry requires the application of novel, improved composite materials. In this paper, we propose the use of a novel 3D printing cement-based composite material with natural, granulated cork, and additional reinforcement using a continuous polyethylene interlayer net combined with polypropylene fibre reinforcement. Our assessment of different physical and mechanical properties of the used materials during the 3D printing process and after curing verified the applicability of the new composite. The composite exhibited orthotropic properties, and the compressive toughness in the direction of layer stacking was lower than that perpendicular to it, by 29.8% without net reinforcement, 42.6% with net reinforcement, and 42.9% with net reinforcement and an additional freeze–thaw test. The use of the polymer net as a continuous reinforcement led to decreased compressive toughness, lowering it on average by 38.5% for the stacking direction and 23.8% perpendicular to the stacking direction. However, the net reinforcement additionally lowered slumping and elephant’s foot effects. Moreover, the net reinforcement added residual strength, which allowed for the continuous use of the composite material after the failure of the brittle material. Data obtained during the process can be used for further development and improvement of 3D-printable building materials.

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Section: Resultsmentioning

confidence: 99%

Section: Three-point Bending (3pb) Testmentioning

confidence: 99%

A 3D Printing Method of Cement-Based FGM Composites Containing Granulated Cork, Polypropylene Fibres, and a Polyethylene Net Interlayer

2023

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Fiber-reinforced polymer waste in the construction industry: a review

Li,

Yang,

Yang

et al. 2024

Environ Chem Lett

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Effects of carbon-sequestering coral aggregate on pore structures and compressive strength of concrete

Mi,

Wang,

et al. 2023

Low-carbon Mater. Green Constr.

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CO2 sequestration/storage shows considerable impacts on the pore structures and compressive strength of concrete. This paper presents a study in which coral aggregates were presoaked in Ca(OH)2 slurries with different solid-to-liquid ratios (i.e. 0.2, 0.4, and 0.6 g/mL) followed by accelerated carbonation. The effects of CO2 sequestration on the particle size distribution, cylinder compressive strength, water absorption, and apparent density of coral aggregate were investigated. The evolution of pore structures in coral aggregate concrete after CO2 sequestration was also studied. Additionally, the effect of CO2 sequestration on the development of compressive strength of coral aggregate concrete was explored. The results showed that CO2 sequestration affected the properties of coral aggregate. Moreover, the porosity of CaCO3 formed by CO2 sequestration was the highest in the concrete. With the increase of solid-to-liquid ratio, the porosity of cement pastes and the CaCO3 increased, and more big pores existed in the cement pastes and CaCO3. Furthermore, the compressive strength of coral aggregate concrete when the solid-to-liquid ratio was 0.2 g/mL increased compared with that before CO2 sequestration, but the compressive strength reduced when the ratio increased to 0.6 g/mL.

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Effects of cement mortar characteristics on aggregate-bed 3D concrete printing

Cited by 5 publications

References 36 publications

A 3D Printing Method of Cement-Based FGM Composites Containing Granulated Cork, Polypropylene Fibres, and a Polyethylene Net Interlayer

A 3D Printing Method of Cement-Based FGM Composites Containing Granulated Cork, Polypropylene Fibres, and a Polyethylene Net Interlayer

Fiber-reinforced polymer waste in the construction industry: a review

Effects of carbon-sequestering coral aggregate on pore structures and compressive strength of concrete

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