Application Research of Alkali Activated Coal Gangue Based Geopolymer in the Field Of Engineering Materials

DOI

10.2991/978-94-6463-726-7_60How to use a DOI?

Keywords

Engineering materials; Geopolymer; Strength characteristics; Microstructure

Abstract

In response to the requirements of carbon neutrality strategy and the demand for new engineering materials, this study adopts the principle of alkali activation to prepare fully solid waste based geopolymer cementitious materials using NaOH, coal gangue (CG), granulated blast furnace slag (GBFS), and quicklime (QL). The influence of each ratio on the flowability and strength of the cementitious materials is analyzed, and the microstructure evolution mechanism is analyzed by XRD, SEM and other methods. The macroscopic results indicate that the CG content has a significant impact on the flowability of the material; The compressive strength of the specimen shows a peak with the increase of QL content and NaOH. The microscopic results show that with the increase of curing age, the diffraction intensity of SiO₂ decreases, the product of C-(A)-S-H gel increases, the microcrack decreases significantly, the porosity decreases gradually, and the structure becomes more compact. The results of this study provide a scientific basis for the development of low-carbon and environmentally friendly new engineering cementitious materials and sustainable development.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Lijuan Su
AU  - Jiabao Yang
PY  - 2025
DA  - 2025/06/13
TI  - Application Research of Alkali Activated Coal Gangue Based Geopolymer in the Field Of Engineering Materials
BT  - Proceedings of the 2024 6th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2024)
PB  - Atlantis Press
SP  - 601
EP  - 607
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-726-7_60
DO  - 10.2991/978-94-6463-726-7_60
ID  - Su2025
ER  -