Mechanical Properties and Pore Structure of Multiwalled Carbon Nanotube-Reinforced Reactive Powder Concrete for Three-Dimensional Printing Manufactured by Material Extrusion

Kan, Deyuan; Liu, Guifeng; Cao, Shiyi; Chen, Zhengfa; Lyu, Qifeng

doi:10.1089/3dp.2022.0243

Cited by 2 publications

(1 citation statement)

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“…According to the research published by Kan et al [236], incorporation of 0.05% MWC-NTs enhances the mechanical properties of the printed reactive powder concrete (RPC) by filling the pores inside the samples and bridging the effect in cracks. Moreover, a dosage of 0.05% MWCNTs is able to change the brittle failure of the printed RPC to ductile failure.…”

Section: Carbon-based Materialsmentioning

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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Section: Carbon-based Materialsmentioning

confidence: 99%