Chemical, mineralogical and thermal characterization of a composite alkali-activated binder based on coal gangue and fly ash

被引:17
作者
Moussadik, Azzedine [1 ]
Saadi, Mohamed [1 ]
Diouri, Abdeljebbar [1 ]
机构
[1] Mohammed V Univ Rabat, Fac Sci, Lab Appl Mat Chem, Rabat, Morocco
关键词
Lightweight alkali-activated binder; Mortar; Coal gangue; Fly ash; Aluminosilicate sources; RED MUD; GEOPOLYMERS;
D O I
10.1016/j.matpr.2022.02.477
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In recent years, alkali-activated binders, including materials called "geopolymers" (low calcium alkaliactivated materials), have received great attention as a promising green building material while reusing a significant amount of industrial waste byproducts. This study presents preliminary results of an ongoing research project to produce lightweight alkali-activated binder based mortar using two Moroccan locally waste materials coal gangue and fly ash as aluminosilicate sources. The heavy metals (Cd, Cu, Ni, Pb and Zn) included in the coal gangue pose an environmental problem. These harmful heavy metals can be released by leaching coal gangue into water and soil. However, when coal gangue is used in an alkali-activated binder in concrete, these elements can become immobilized in the concrete and subsequently have a potentially positive impact on the environment and health. The raw materials used in the mortar mixture in this study were as follows: coal gangue, fly ash, lime, sand and gypsum. Sodium hydroxide solution (5 M) was used as an alkali activator in the mixture, which was placed into a cylinder mold and cured at room temperature. Then, the product obtained was tested by X-Ray diffraction (XRD), infrared (FTIR) and thermogravimetric analysis (TG-DTA). Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the 3rd International Congress on Materials & Structural Stability.
引用
收藏
页码:1452 / 1458
页数:7
相关论文
共 30 条
[1]  
Abdullah M.M. A., 2011, Int. J. Pure Appl. Sci. Technol, V6, P35
[2]  
Addou R., 2017, Journal of Materials and Environmental Science, V8, P3473
[3]   Reuse of base-metal tailings as aggregates for rendering mortars: Assessment of immobilization performances and environmental behavior [J].
Argane, R. ;
Benzaazoua, M. ;
Hakkou, R. ;
Bouamrane, A. .
CONSTRUCTION AND BUILDING MATERIALS, 2015, 96 :296-306
[4]  
Belkheiria D, 2015, J. Mater. Environ. Sci., V6, P1570
[5]   Geopolymers: Ceramic-Like Inorganic Polymers [J].
Davidovits, J. .
JOURNAL OF CERAMIC SCIENCE AND TECHNOLOGY, 2017, 8 (03) :335-350
[6]   Alkali-Activated Materials Based on Callovo-Oxfordian Argillite: Formation, Structure and Mechanical Properties [J].
Dupuy, C. ;
Gharzouni, A. ;
Texier-Mandoki, N. ;
Bourbon, X. ;
Rossignol, S. .
JOURNAL OF CERAMIC SCIENCE AND TECHNOLOGY, 2018, 9 (02) :127-140
[7]   Rheological behaviour and mechanical properties of Moroccan ternary binder's Portland clinker-fly ash-limestone [J].
El Fami, Nisrine ;
Ez-Zaki, Hassan ;
Boukhari, Ali ;
Diouri, Abdeljebbar .
CONSTRUCTION AND BUILDING MATERIALS, 2021, 279
[8]   Influence of different sources of coal gangue used as aluminosilicate powder on the mechanical properties and microstructure of alkali-activated cement [J].
Frasson, B. J. ;
Pinto, R. C. A. ;
Rocha, J. C. .
MATERIALES DE CONSTRUCCION, 2019, 69 (336)
[9]   Comparison of red mud and coal gangue blended geopolymers synthesized through thermal activation and mechanical grinding preactivation [J].
Geng, JunJun ;
Zhou, Min ;
Li, Yixin ;
Chen, Yuchi ;
Han, Yi ;
Wan, Sha ;
Zhou, Xian ;
Hou, Haobo .
CONSTRUCTION AND BUILDING MATERIALS, 2017, 153 :185-192
[10]   Preparation of blended geopolymer from red mud and coal gangue with mechanical co-grinding preactivation [J].
Geng, Junjun ;
Zhou, Min ;
Zhang, Ting ;
Wang, Weixing ;
Wang, Teng ;
Zhou, Xian ;
Wang, Xiaoshu ;
Hou, Haobo .
MATERIALS AND STRUCTURES, 2017, 50 (02)