Alkali-activation of synthetic aluminosilicate glass with basaltic composition
|Author:||Alzeer, Mohammad I. M.1; Nguyen, Hoang1; Cheeseman, Christopher2;|
1Fibre and Particle Engineering Research Unit, University of Oulu, Oulu, Finland
2UKCRIC Advanced Infrastructure Materials Laboratory, Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom
|Online Access:||PDF Full Text (PDF, 3.2 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2021092046680
|Publish Date:|| 2021-09-20
Alkali-activated materials (AAMs) are a potential alternative to Portland cement because they can have high strength, good durability and low environmental impact. This paper reports on the structural and mechanical characteristics of aluminosilicate glass with basalt-like compositions, as a feedstock for AAMs. The alkali-activation kinetics, microstructure, and mechanical performance of the alkali activated glass were investigated. The results show that AAMs prepared from basalt glass have high compressive strength (reaching up to 90 MPa after 7 days of hydration) compared to those made using granulated blast furnace slag (GBFS). In addition, calorimetry data show that the hydrolysis of the developed glass and subsequent polymerization of the reaction product occur at a faster rate compared to GBFS. Furthermore, the obtained results show that the alkali activation of the developed glass formed sodium aluminosilicate hydrate (N-A-S-H) intermixed with Ca aluminosilicate hydrate gel (C-A-S-H), while the alkali activation of GBFS resulted in predominantly C-A-S-H gel. The developed glass can be formed from carbonate-free and abundant natural resources such as basalt rocks or mixtures of silicate minerals. Therefore, the glass reported herein has high potential as a new feedstock of AAMs.
Frontiers in chemistry
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
MA is grateful for the support from University of Oulu Kvantum Institute strategic research funding. PK is grateful for the support from the University of Oulu and the Academy of Finland Profi5 (326291), as well as for the Academy of Finland grant no. 322085.
|Academy of Finland Grant Number:||
322085 (Academy of Finland Funding decision)
© 2021 Alzeer, Nguyen, Cheeseman and Kinnunen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.