Article
Version 1
Preserved in Portico This version is not peer-reviewed
Use of Alkaline-Activated Energy Waste Raw Materials in Geopolymer Concrete
Version 1
: Received: 14 February 2024 / Approved: 14 February 2024 / Online: 16 February 2024 (04:14:59 CET)
A peer-reviewed article of this Preprint also exists.
Nalewajko, M.; Bołtryk, M. Use of Alkaline-Activated Energy Waste Raw Materials in Geopolymer Concrete. Materials 2024, 17, 2253. Nalewajko, M.; Bołtryk, M. Use of Alkaline-Activated Energy Waste Raw Materials in Geopolymer Concrete. Materials 2024, 17, 2253.
Abstract
Silica fly ash, Certyd aggregate, and an alkaline solution were used to produce lightweight geo-polymer concretes. The compressive strength, water absorption, bulk density and SEM photos showing the structure of the obtained composite were carried out. Tests conducted on the specifi-cation of lightweight geopolymer concretes have revealed significant chemical interactions between the ash aggregate and the geopolymer mortar, particularly when the coarse aggregate surface has been pre-treated with an alkaline solution. Statistical analysis of the experimental data, which in-vestigated the influence of three key variables on compressive strength, water absorption, and bulk density of Lightweight Geopolymer Concrete (LBG), identified the following factors as having the most substantial impact: the quantity of alkali used, the curing temperature, and the concentration of alkali in the mixture. The optimal test series exhibited a commendable compressive strength of 20.14 megapascals (MPa), accompanied by a water absorption rate of 14.72% and a bulk density of 1486.6 kilograms per cubic meter (kg/m³). These findings underscore the importance of alkali con-tent, curing temperature, and alkali concentration in tailoring the properties of lightweight geo-polymer concrete to meet specific performance requirements.
Keywords
lightweight geopolymer concrete; aluminosilicate artificial aggregate; fly ashes; compressive strength of geopolymers; water absorption; bulk density
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment