Influence of the printing direction and age on the mechanical properties of 3D printed concrete

Zahabizadeh, Behzad; Nunes-Pereira, J.; Gonçalves, Cláudia; Pereira, Eduardo; Cunha, Vítor M. C. F.

doi:10.1617/s11527-021-01660-7

Cited by 19 publications

(13 citation statements)

References 52 publications

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“…A reduction in the amount of both capillary pores and total volume of pores is reported by [11,42] due to the increase in the curing age in cementitious materials. In a previous study [28] which concerns the mechanical/physical properties of the same cementitious mixture composition of this research, a reduction of about 46% was observed in the porosity of 3D-printed specimens from the curing age of 3 days to 28 days.…”

Section: Influence Of Curing Age On Adsorptionsupporting

confidence: 53%

“…The mixture composition was defined in previous experimental works regarding the development and characterization of the mechanical behaviour of ternary cementitious mortars for 3D concrete printing [28,36]. Table 1 includes the constituents used in the selected mortar composition.…”

Section: Methodsmentioning

confidence: 99%

“…The main scope of this study was to evaluate the potential of adding photocatalytic functionalization with focus on the RhB dye photodegradation efficiency to cementitious materials that have been developed for 3DCP [28]. The 3DCP technology as a freeform construction methodology allows a multitude of advantages; in this context, the specimen surface can be coated right away after finishing the printing process.…”

Section: Research Significancementioning

confidence: 99%

“…The mortar specimens were manufactured through a small 3D concrete printer. The specification and characteristics of the 3D printer can be found elsewhere [28]. In each printing batch, several cementitious mortar strips were printed.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Nevertheless, these aspects need to be evaluated. As the 3D-printing technology is a free-form construction process [28], it is feasible to spray the TiO 2 aqueous suspension immediately after printing the elements in order to improve the bonding properties. On the other hand, the results obtained for the specimens coated at the age of 7 days could also demonstrate the efficiency of this type of functionalizing method for hardened cementitious specimens.…”

Section: Influence Of the Tio2 Coating Rates On The Photocataytic Efficiencymentioning

confidence: 99%

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Development of Photocatalytic 3D-Printed Cementitious Mortars: Influence of the Curing, Spraying Time Gaps and TiO2 Coating Rates

et al. 2021

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This work evaluated the photocatalytic activity of 3D-printed cementitious mortar specimens functionalized with TiO2 nanoparticles to obtain a multifunctional and smart concrete. This research aims to assess the influence of different parameters related to the functionalization process such as adsorption, coating time gaps, and coating rates on the degradation efficiency of the functionalized cementitious specimens. Each specimen was evaluated under the degradation of Rhodamine B (RhB) in an aqueous solution using a sun-light simulation. The obtained results showed a decrease in adsorption (under dark condition) with increasing the sample curing age. The highest photocatalytic efficiency was observed for coated samples aged 7 days. By increasing the coating rates, the photocatalytic efficiency is enhanced. Nonetheless, regardless of the coating rates, all the specimens showed an increase in photocatalytic efficiency for longer time periods of light exposition, i.e., after 8 h of irradiation.

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Section: Influence Of Curing Age On Adsorptionsupporting

confidence: 53%

Section: Methodsmentioning

confidence: 99%

Section: Research Significancementioning

confidence: 99%

Section: Sample Preparationmentioning

confidence: 99%

Section: Influence Of the Tio2 Coating Rates On The Photocataytic Efficiencymentioning

confidence: 99%

See 3 more Smart Citations