3D-printable alkali-activated concretes for building applications: A critical review. (14th February 2022)

• Record Type: Journal Article
• Authors: Amran, Mugahed; Abdelgader, Hakim S.; Onaizi, Ali M.; Fediuk, Roman; Ozbakkaloglu, Togay; Rashid, Raizal S.M.; Murali, G.
• Is Part Of: Construction & building materials. Volume 319(2022)
• Publication Date: 2022-02-14
• Subjects: 3DCP 3D-concrete printing -- 3DPCT 3D-printing concrete technology -- AAM Alkali-activated material -- AM Additive manufacturing -- CAD Computer-aided design -- FA Fly ash -- GGBS Granulated blast furnace slag -- MK Metakaolin -- MPKC Magnesium potassium phosphate cement -- OPC Ordinary Portland cement -- POFA Palm oil fuel ash -- RHA Rice husk ash -- RM Red mud -- SF Silica fume -- SXSW South by Southwest; Applications -- Buildability -- 3D-Printing -- Alkali-activated materials (AAMs) -- Sustainability -- Pumpability 3D-printable concrete -- Digitization; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2021.126126
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The 3DPCT is an advanced technique used to produce an appropriate 3D printing material. The printability, buildability and interlayer bond are the keys to study the properties of 3DPC. The alkali-activated materials are regarded as a better binder for 3DCP. The 3DPCT can fulfill the requirements of industrialization for engineered construction. Future investigations are also delivered for enabling the wide use of 3DPCT in real applications. Abstract: The construction sector has embraced digitalization and industrialization to boost production, reduce material consumption, and improve workmanship. The 3D-printed concrete technology (3DPCT), more broadly recognized as the design of a 3D object via a computer-aided design (CAD) model or a digital 3D model, has accelerated considerable progress in these areas in other industries. Although 3DPCT has advanced remarkably in recent years, producing an appropriate 3D printing material that improves performance while reducing material consumption, which is really important for CO2 reduction, is urgently needed. The present 3DPCT faces many obstacles, one of which is the limited range of printable concretes. To tackle this limitation, extensive studies on developing creative approaches for formulating alkali-activated materials (AAMs) for 3DPCT for modern building applications have been conducted. AAMs are maintainable substitutive binders to ordinary Portland cement. Therefore, the need to undertake a comprehensive literature review on the current status of AAM performance on 3D-printable concretes for building applications is substantial. This article comprehensively reviews the quality requirements, advantages, disadvantages, common techniques, delivery, and placement of 3DCP. This literature also delivers indepth reviews on the behaviors and the properties of AAM-based concrete composites used in 3D-printed construction. Moreover, research trends are moving toward a wide-ranging understanding concerning the economic benefits and the environmental footprints of 3DCP for building applications with AAMs as suitable concrete materials for the emerging robust eco-friendly concrete composite for digital construction constructions nowadays. Given the merits of the study, several hotspot research topics for future investigations are also provided for facilitating the wide use of 3DPCT in real applications to address rapidly the gap between demand and supply for smart and cost-effective homes for upcoming generations.