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 |
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 | Size | Format | |
---|---|---|---|
1-s2.0-S2214509523004382-main.pdf | 6.69 MB | Adobe PDF | View/Open |
CORE Recommender
SCOPUSTM
Citations
9
checked on Sep 1, 2024
WEB OF SCIENCETM
Citations
6
checked on Aug 24, 2024
Page view(s)
114
checked on Sep 2, 2024
Download(s)
100
checked on Sep 2, 2024
Google ScholarTM
Check
Altmetric
Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.