3D printing of asphalt and its effect on mechanical properties

Jackson, Richard J.; Wojcik, Adam; Miodownik, Mark

doi:10.1016/j.matdes.2018.09.030

Cited by 41 publications

(24 citation statements)

References 21 publications

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“…The horizontal directions are designated by X and Y whereas vertical path is labelled by Z. In some machine the information data of G-code can be read from USB, micro SD or directly from the machine memory [10,11].…”

Section: Introductionmentioning

confidence: 99%

The effect of nozzle hole diameter of 3D printing on porosity and tensile strength parts using polylactic acid material

et al. 2020

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Nozzle hole diameter of 3D printer (3DP) can be varied to obtain required product quality as well as to reduce manufacturing times. The use of larger diameter may accelerate manufacturing times of products, yet the product quality, including the mechanical properties, still needs to be investigated profoundly. The purpose of this work is to investigate experimentally the effect of nozzle hole diameter of 3DP to the surface quality, accuracy, and the strength of the product. The specimens were manufactured by fused deposition modelling (FDM) 3D printing using polylactic acid (PLA) as the filaments.Bed temperature, extruder temperature and printing speed were set to be 60∘C, 200∘C and 80 mm/s respectively. The thickness of each layer was set at the ratio of 20% to the nozzle hole diameter. Infill pattern was determined by using line type of 100%. Nozzle hole diameter of 0.3, 0.4, 0.5 and 0.6mmwas compared in thiswork. The results show that bigger nozzle hole diameter enhanced the density and tensile strength of the products thought it was not linearly correlation.

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Section: Introductionmentioning

confidence: 99%

The effect of nozzle hole diameter of 3D printing on porosity and tensile strength parts using polylactic acid material

et al. 2020

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“…The basic design of the printheads developed by Bellini [ 10 ] and Reddy et al [ 13 ] was further explored and improved by Silveira et al [ 15 ], Jackson et al [ 24 ], Singamneni et al [ 32 , 33 ], Tseng et al [ 34 ], Zhou et al [ 37 ], Leng et al [ 39 ], Alexandre et al [ 41 ], and Wang et al [ 44 ]. Except for the printhead developed by Jackson et al [ 24 ], all equipment adopted a screw with a compression profile. Silveira et al [ 15 ], Jackson et al [ 24 ], and Alexandre et al [ 41 ] integrated their deposition tools into low-cost desktop 3D printers.…”

Section: Technological Evolution Of Screw-assisted Eammentioning

confidence: 99%

“…Except for the printhead developed by Jackson et al [ 24 ], all equipment adopted a screw with a compression profile. Silveira et al [ 15 ], Jackson et al [ 24 ], and Alexandre et al [ 41 ] integrated their deposition tools into low-cost desktop 3D printers. In contrast, Tseng et al [ 34 ], Singamneni et al [ 32 ], and Wang et al [ 44 ] constructed their own Cartesian positioning platforms.…”

Section: Technological Evolution Of Screw-assisted Eammentioning

confidence: 99%

“…Tseng et al [ 34 ] designed their printhead to process pellets of highly viscous polymers, and added infrared (IR) heaters near the deposition nozzle to prevent delamination and warping when printing. The equipment designed by Jackson et al [ 24 ] was very simple and both the auger screw and housing could be fabricated in acrylic resin by a stereolithography process, since the intended processing temperature for the petroleum-based pellets was relatively low. Alexandre et al [ 41 ] replaced the FFF printhead of a low-cost 3D printer with a do-it-yourself screw-extruder kit, marketed by a recently founded company.…”

Section: Technological Evolution Of Screw-assisted Eammentioning

confidence: 99%

“…In either case, adjusting the design of the printhead with relation to specific material properties or processing requirements was not on the scope. Anyway, the referred articles described experiments with different materials, such as ceramics (PZT/ECG8 [ 12 ], Fe 2 O 3 +Al 2 O 3 /binders, and Fe 2 O 3 +ZrO 2 +Y 2 O 3 /binders [ 42 ]), neat and reinforced thermoplastics (polycaprolactone (PCL) [ 11 , 44 ], poly(L-lactide-co-D,L-lactide)/tricalcium phosphate (PLDLLA/TCP), ethylene vinyl acetate (EVA) [ 25 – 27 , 29 , 51 ], acrylonitrile butadiene styrene (ABS) [ 28 , 30 ], polypropylene (PP) [ 28 ], ABS/aluminum [ 30 ], bitumen [ 24 ], hardmetals (WC-Co [ 54 ]), and medicines (hydroxypropylcellulose/itraconazole [ 53 ]).…”

Section: Extruder Modificationsmentioning

confidence: 99%

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Screw-assisted 3D printing with granulated materials: a systematic review

Netto

Idogava

Santos

et al. 2021

Int J Adv Manuf Technol

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This paper presents a systematic review on extrusion additive manufacturing (EAM), with focus on the technological development of screw-assisted systems that can be fed directly with granulated materials. Screw-assisted EAM has gained importance as an enabling technology to expand the range of 3D printing materials, reduce costs associated with feedstock fabrication, and increase the material deposition rate compared to traditional fused filament fabrication (FFF). Many experimental printheads and commercial systems that use some screw-processing mechanism can be found in the literature, but the design diversity and lack of standard terminology make it difficult to determine the most suitable solutions for a given material or application field. Besides, the few previous reviews have offered only a glimpse into the topic, without an in-depth analysis about the design of the extruders and associated capabilities. A systematic procedure was devised to identify the screw-assisted EAM systems that can print directly from granulated materials, resulting in 61 articles describing different pieces of equipment that were categorized as experimental printheads and commercial systems, for small- and large-scale applications. After describing their main characteristics, the most significant extruder modifications were discussed with reference to the materials processed and performance requirements. In the end, a general workflow for the development of 3D printers based on screw extrusion was proposed. This review intends to provide information about the state-of-the-art screw-assisted EAM and help the academy to identify further research opportunities in the field.

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