Feasibility analysis of the preparation of geopolymers from different types of coal based ash: Reaction, synthesis, and properties
Source abstract
Abstract
This study compared the feasibility of circulating fluidized bed boiler fly ash (CFBFA), pulverized coal furnace fly ash (PCFA), and coal gasification slag (CGS) for the preparation of geopolymers by investigating the Si and Al dissolution reaction of the raw materials, product structure, and the development of the mechanical properties of the geopolymers. The results indicated that the reaction mechanism for preparing geopolymers were the same for the three kinds of coal based ash, i.e., the depolymerization and repolymerization of Si-O and Al-O bonds in raw materials. The loose and porous microstructure of CFBFA resulted in a high dissolution ratio of amorphous Si and Al, and its self-hardening properties generated ettringite crystals. This resulted in a high initial strength of the CFBFA based geopolymer (CFBFAG). The active Si and Al in PCFA and CGS were released slowly during the curing process, which was conducive to an enhanced compressive strength of the geopolymer in the later stage. The compressive strengths of the CGS based geopolymer (CGSG) after curing for 90 days reached 52.1 MPa, which was 139% and 11.4% higher than that of CFBFAG and PCFAG for the same curing time respectively. A microstructure analysis showed that the CGSG had a denser microstructure and more ordered geopolymer gel network than the other geoploymers. Compared with the CFBFA and PCFA, CGS was found to have a greater application potential in the preparation of geopolymers.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Advanced ceramic materials synthesis · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (51)
Show source-provided references
1. Geopolymers and geopolymeric materials [J]10.1007/BF01904446 ↗
2. Potential applications of geopolymer concrete in construction: a review [J]
3. Analytical review of geopolymer concrete: retrospective and current issues [J]10.3390/ma16103792 ↗
4. Durability evaluation of geopolymer and conventional concretes [J]10.1016/j.conbuildmat.2017.01.056 ↗
5. High-strength geopolymer concrete-properties, advantages and challenges [J]10.11648/j.am.20180702.11 ↗
6. Durability characteristics of geopolymer concrete-Progress and perspectives [J]10.1016/j.jobe.2022.105100 ↗
7. Influence of partial substitution of metakaolin by palm oil fuel ash and alumina waste ash on compressive strength and microstructure in metakaolin-based geopolymer mortar [J]
8. Durability performance evaluation of green geopolymer concrete [J]10.1080/19648189.2020.1847691 ↗
9. Production of perlite-based-aerated geopolymer using hydrogen peroxide as eco-friendly material for energy-efficient buildings [J]10.1016/j.jmrt.2023.02.179 ↗
10. Reaction, structure and properties of eco-friendly geopolymer cement derived from mechanically activated pumice [J]10.1016/j.ceramint.2022.10.204 ↗
11. Strength development properties of geopolymer paste and mortar with respect to amorphous Si/Al ratio of fly ash [J]10.1016/j.conbuildmat.2017.06.078 ↗
12. Geopolymer concrete with high strength, workability and setting time using recycled steel wires and basalt powder [J]
13. Effect of temperature on bond characteristics of geopolymer concrete [J]10.1016/j.conbuildmat.2017.12.043 ↗
14. Strength evaluation by using polycarboxylate superplasticizer and solidification efficiency of Cr6+, Pb2+ and Cd2+ in composite based geopolymer [J]10.1016/j.jclepro.2018.04.033 ↗
15. Developing zero carbon emission pavements with geopolymer concrete: a comprehensive review [J]10.1016/j.trd.2022.103436 ↗
16. The performance of controlled low-strength material base supporting a high-volume asphalt pavement [J]10.1007/s12205-018-1527-z ↗
17. Green protective geopolymer coatings: interface characterization, modification and life-cycle analysis [J]10.3390/ma15113767 ↗
18. Experimental study on calcium carbide residue as a combined activator for coal gangue geopolymer and feasibility for soil stabilization [J]10.1016/j.conbuildmat.2021.125465 ↗
19. Sulphate removal over barium-modified blast-furnace-slag geopolymer [J]10.1016/j.jhazmat.2016.06.001 ↗
20. Effects of glass fiber on recycled fly ash and basalt powder based geopolymer concrete [J]
21. Effect of particle size and thermal activation on the coal gangue based geopolymer [J]10.1016/j.matchemphys.2021.124657 ↗
22. Study on preparation of coal gangue-based geopolymer concrete and mechanical properties [J]
23. Mechanical performance of geopolymer concrete with micro silica fume and waste steel lathe scraps [J]
24. Preparation of red mud-based geopolymer materials from MSWI fly ash and red mud by mechanical activation [J]10.1016/j.wasman.2018.11.019 ↗
25. Alkali-activated controlled low-strength material utilizing high-calcium fly ash and steel slag for use as pavement materials [J]10.1061/(ASCE)MT.1943-5533.0003798 ↗
26. A comprehensive review on the applications of coal fly ash [J]10.1016/j.earscirev.2014.11.016 ↗
27. Review of the characteristics and graded utilisation of coal gasification slag [J]10.1016/j.cjche.2021.05.007 ↗
28. Durability of concrete with coal gasification slag and coal gangue powder [J]10.3389/fmats.2021.791178 ↗
29. The relevance of ultrafine fly ash properties and mechanical properties in its fly ash-cement gelation blocks via static pressure forming [J]10.1016/j.conbuildmat.2018.08.035 ↗
30. On the connotation, challenge and significance of China's “energy independence” strategy [J]10.1016/S1876-3804(20)60062-3 ↗
31. How do fossil energy prices affect the stock prices of new energy companies? Evidence from Divisia energy price index in China's market [J]10.1016/j.energy.2018.12.032 ↗
32. Design and experimental study of a blended cement containing high-volume solid waste activated ultrafine powder [J]10.1016/j.conbuildmat.2021.124504 ↗
33. Preparation and application of porous materials from coal gasification slag for wastewater treatment: a review [J]10.1016/j.chemosphere.2021.132227 ↗
34. Long-term dissolution behavior of amorphous aluminosilicate in sodium hydroxide solution for geopolymer synthesis using circulating fluidized bed combustion fly ash [J]10.1016/j.conbuildmat.2023.132143 ↗
35. Synthesis factors affecting mechanical properties, microstructure, and chemical composition of red mud–fly ash based geopolymers [J]10.1016/j.fuel.2014.05.058 ↗
36. Characterizations of FBC/PCC fly ash geopolymeric composites [J]10.1016/j.conbuildmat.2014.05.067 ↗
37. Utilization of fly ash blends from pulverized coal and fluidized bed combustions in geopolymeric materials [J]10.1016/j.cemconcomp.2010.09.017 ↗
38. Utilization of fly ash-based geopolymer for well cement during CO2 sequestration: a comprehensive review and a meta-analysis [J]10.1016/j.jgsce.2023.204974 ↗
39. Microstructure and properties of TiO2 modified coal gasification coarse slag based on geopolymer [J]
40. Use of waste glass powder toward more sustainable geopolymer concrete [J]10.1016/j.jmrt.2023.05.094 ↗
41. The use of crushed recycled glass for alkali activated fly ash based geopolymer concrete and prediction of its capacity [J]10.1016/j.jmrt.2023.05.079 ↗
42. Synthesis and characterization of geopolymer prepared from circulating fluidized bed-derived fly ash [J]10.1016/j.ceramint.2022.01.052 ↗
43. Evaluation of calcium carbide residue and fly ash as sustainable binders for environmentally friendly loess soil stabilization [J]10.1038/s41598-024-51326-x ↗
44. Relationships between composition, structure and strength of inorganic polymers: Part I Metakaolin-derived inorganic polymers [J]10.1007/s10853-005-1226-2 ↗
45. Concentration of NaOH and the effect on the properties of fly ash based geopolymer [J]10.1016/j.proeng.2016.06.568 ↗
46. Effect of curing temperature on the reaction kinetics of cementitious steel slag-fly ash-desulfurized gypsum composites system [J]
47. Investigation of the coal fly ashes using IR spectroscopy [J]10.1016/j.saa.2014.05.052 ↗
48. Reactivity and self-hardening of fly ash from the fluidized bed combustion of wood and peat [J]10.1016/j.fuel.2014.06.029 ↗
49. In situ ATR-FTIR study of the early stages of fly ash geopolymer gel formation [J]10.1021/la701185g ↗
50. Reaction kinetics of red mud-fly ash based geopolymers: Effects of curing temperature on chemical bonding, porosity, and mechanical strength [J]10.1016/j.cemconcomp.2018.07.008 ↗
51. Characterization, microstructure and properties of fly ash-based geopolymer [J]