The Influence of Sintering Temperature on the Microstructure of Coal-Ash Based Geopolymers

• Autorzy: Burduhos-Nergis Dumitru Doru , Vizureanu Petrica , Achitei Dragos C. , Sandu Andrei Victor , Burduhos-Nergis Diana Petronela , Abdullah Mohd Mustafa Al Bakri

Identyfikatory

DOI

10.24425/amm.2023.142444

• Języki publikacji: EN

Abstrakty

EN

Currently, one of the main challenges of civil engineering and science materials engineers is to develop a sustainable substitute for Ordinary Portland Cement. While the most promising solution is provided by the geopolymerisation technology, most of the studied geopolymers are based on natural raw materials (kaolin). The metakaolin is mainly preferred because of its rapid rate of dissolution in the activator solution, easy control of the Si/Al ratio, and white color. However, its high cost prevents it from being widely used in geopolymer composites or other materials that can become an industrial alternative for Ordinary Portland Cement. Several studies have shown that geopolymers with good performance can also be obtained from secondary raw materials (industrial wastes such as coal ash or slag). This explains why countries with rapidly developing economies are so interested in this technology. These countries have significant amounts of industrial waste and lack a well-developed recycling infrastructure. Therefore, the use of these by-products for geopolymers manufacturing could solve a waste problem while simultaneously lowering virgin raw material consumption. This study evaluates the effect of replacing different amounts of coal ash with sand on the microstructure of sintered geopolymers. Accordingly, scanning electron microscopy and energy dispersive X-ray analysis were involved to highlight the morphological particularities of room-cured and sintered geopolymers.

Słowa kluczowe

EN

geopolymers; alkali activation; microstructural analysis; sintered structures; high temperature exposure

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 2
• Strony: 631--637
• Opis fizyczny: Bibliogr. 28 poz., fot., tab.

Twórcy

autor

Burduhos-Nergis Dumitru Doru

• Gheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, D. Mangeron 41, 700050 Iasi, Romania

• https://orcid.org/0000-0002-2716-1328

autor

Vizureanu Petrica

• Gheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, D. Mangeron 41, 700050 Iasi, Romania
• Technical Sciences Academy of Romania, Dacia Blvd 26, 030167 Bucharest, Romania

• https://orcid.org/0000-0002-3593-9400

autor

Achitei Dragos C.

• Gheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, D. Mangeron 41, 700050 Iasi, Romania

• https://orcid.org/0000-0002-8562-9507

autor

Sandu Andrei Victor

• Gheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, D. Mangeron 41, 700050 Iasi, Romania
• Romanian Inventors Forum, St. P. Movila 3, 700089 Iasi, Romania

• https://orcid.org/0000-0002-9292-749X

autor

Burduhos-Nergis Diana Petronela

• Gheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering, D. Mangeron 41, 700050 Iasi, Romania

• https://orcid.org/0000-0002-0680-9885

autor

Abdullah Mohd Mustafa Al Bakri

• Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), Arau 02600, Perlis, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering Technology, Arau 02600, Perlis, Malaysia

• https://orcid.org/0000-0002-9779-8586

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Uwagi

This paper was financially supported by the Project “Network of excellence in applied research and innovation for doctoral and postdoctoral programs”/InoHubDoc, project co-funded by the European Social Fund financing agreement no. POCU/993/6/13/153437. This paper was also supported by “Gheorghe Asachi” Technical University from Iaşi (TUIASI), through the Project “Performance and excellence in postdoctoral research 2022”