Sustainable Materials for Additive Manufacturing: Earth-Based Concrete

Tarhan, Yeşim; Tarhan, İsmail Hakkı; Craveiro, Flávio; Bártolo, Helena

doi:10.1007/978-3-030-75315-3_75

Cited by 4 publications

(1 citation statement)

References 35 publications

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“…Examples of shrinkage cracks that occurred at early ages of 3DPC are shown in Figure 14. According to the significant development of 3DPC in the recent decades, researchers have studied many kinds of 3D-printing special cementitious composites such as geopoly-mer concrete [34,51,[165][166][167][168][169], underwater printable concrete [170], foam concrete [171][172][173][174][175][176][177][178], engineered cementitious composite [33,[179][180][181][182], magnesium potassium phosphate cement concrete [183][184][185][186][187], and earth-based materials [188][189][190]. Although, most definitely, the mix proportion of each special concrete is different, the water-binder ratio and sand-binder ratio frequently report within the range of 0.30-0.40 and 1.2-2.0, respectively.…”

Section: Proportion Of 3d-printed Cementitious Compositesmentioning

confidence: 99%

Nanomaterials as Promising Additives for High-Performance 3D-Printed Concrete: A Critical Review

et al. 2023

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Three-dimensional (3D) printed concrete (3DPC), as one of the subset of digital fabrication, has provided a revolution in the construction industry. Accordingly, scientists, experts, and researchers in both academic and industry communities are trying to improve the performance of 3DPC. The mix design of all kinds of concrete has always been the most crucial property to reach the best efficiency. Recently, many studies have been performed to incorporate nano- and micro-scale additives to ameliorate the properties of 3DPC. The current study aims to present the main design properties of 3DPC and completely cover both fresh and hardened state characteristics of 3DPC containing different nano- and micro-additives. Our observations illustrate that nanomaterials can be mainly utilized as a thickener to ameliorate the thixotropic behavior and the structural build-up of 3DPC, resulting in higher yield stress and better viscosity recovery. Furthermore, each nanomaterial, through its unique impact, can provide lower porosity and permeability as well as better mechanical strengths for 3DPC. Although much research investigate the fresh properties of 3DPC containing nano and micro additives, future studies are needed to provide better insight into the impact of these kinds of additives on the hardened characteristics of 3DPC. In addition, researchers may devote more research to address the effects of the additives discussed herein on the performance of other kinds of 3DPC such as lightweight, self-compacting, etc. It should be noted that the effect mechanism of nanomaterials on the inter-layer bond strength of 3DPC is another crucial issue that should be investigated in future studies. Furthermore, nano-scale fillers from source of waste and biomass can be attractive additives for future research to achieve high performance of sustainable 3D-printed concrete.

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