Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/13674
Title: Development of Ca(OH)2-based geopolymer for additive manufacturing using construction wastes and nanomaterials
Authors: Mortada, Youssef
Masad, Eyad
Kogbara, Reginald B.
Mansoor, Bilal
Seers, Thomas
Hammoud, Ahmad
Karaki, Ayman
Keywords: Additive manufacturing
Geopolymer
Nanomaterials
Sustainability
Waste
Issue Date: Dec-2023
Publisher: Elsevier
Abstract: Recent growth in additive manufacturing (AM) or 3D printing in the construction field has motivated the development of various materials that vary in its composition and properties. This paper introduces, characterizes, and evaluates the performance of a sustainable and environmentally friendly geopolymer mixture composed of construction wastes. The geopolymer mixture has calcium hydroxide (Ca(OH)2) as the main alkaline activator and incorporates nanomaterials such as nano-silica and nano-clay to enhance its suitability for AM. The combined use of Ca(OH)2 for alkali activation, and nanomaterials for tailoring the behavior of construction wastes for 3D printing, is novel and addresses the shortcomings of conventional alkaline activators. The paper includes the outcomes of the analysis of the mechanical properties, printability, and microstructure of the geopolymer mixture. The 28-day compressive strength of the mixture reached 42 MPa with ambient temperature curing, which is comparable to traditional geopolymers. The inclusion of 1 wt % of nano-silica accelerated the geopolymerization process and led to the largest (35 %) reduction in the setting time. Similarly, incorporating 1 wt % of nano-clay led to reduction of the thermal conductivity from 0.709 W/mK to 0.505 W/mK, due to the introduction of thermal barriers. The printability of the studied waste-based geopolymer mixture was validated through the successful fabrication of a 3D-printed model. © 2023 The Authors
URI: https://doi.org/10.1016/j.cscm.2023.e02258
https://hdl.handle.net/11147/13674
ISSN: 2214-5095
Appears in Collections:Environmental Engineering / Çevre Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File SizeFormat 
1-s2.0-S2214509523004382-main.pdf6.69 MBAdobe PDFView/Open
Show full item record



CORE Recommender

SCOPUSTM   
Citations

3
checked on Feb 17, 2024

WEB OF SCIENCETM
Citations

2
checked on Feb 17, 2024

Page view(s)

16
checked on Feb 26, 2024

Download(s)

10
checked on Feb 26, 2024

Google ScholarTM

Check




Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.