An innovative method for buildability assessment of 3d printed concrete at early-ages

Shahzad, Qamar; Li, Fang-yuan

doi:10.1016/j.conbuildmat.2023.133167

Cited by 4 publications

(1 citation statement)

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“…With current production technologies of Industry 4.0, 3D printing has started to be widely used in the construction sector [ 1 , 2 , 3 ]. Production of 3D printable concrete (3DPC), which is applied layer by layer without the use of molds [ 4 , 5 ], results in a faster production process compared to traditional concrete [ 6 ]. Additionally, various researchers have reported several advantages, including lower labor requirements [ 7 ], reduced risk of work accidents [ 8 ], higher architectural freedom [ 9 ], and partially lower costs [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Silica Fume Utilization on Structural Build-Up, Mechanical and Dimensional Stability Performance of Fiber-Reinforced 3D Printable Concrete

Şahin,

Mardani,

Beytekin

2024

Polymers

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It is known that 3D printable concrete mixtures can be costly because they contain high dosages of binder and that the drying-shrinkage performance may be adversely affected. Mineral additives and fibers are generally used to control these negative aspects. In this study, the use of silica fume, a natural viscosity modifying admixture, was investigated to improve the rheological and thixotropic behavior of 3D printable concrete mixtures reinforced with polypropylene fiber (FR-3DPC). The effect of increasing the silica fume utilization ratio in FR-3DPC on the compressive strength (CS), flexural strength (FS), and drying-shrinkage (DS) performance of the mixtures was also examined. A total of five FR-3DPC mixtures were produced using silica fume at the rate of 3, 6, 9, and 12% of the cement weight, in addition to the control mixture without silica fume. As a result of the tests, the dynamic yield stress value decreased with the addition of 3% silica fume to the control mixture. However, it was found that the dynamic yield stress and apparent viscosity values of the mixtures increased with the addition of 6, 9, and 12% silica fume. With the increase in the use of silica fume, the CS values of the mixtures were generally affected positively, while the FS and DS behavior were affected negatively.

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