According to the estimates of relevant institutions, the total production of fly ash in China will reach 918 million tons in 2025, an increase of about 3% over the same period last year, reaching a new record high. At the same time, as one of the important ways to absorb fly ash, the demand for cement market continues to decline. In the past few years, cement enterprises had to pay high prices to buy fly ash from power plants as cement admixture, but now some power plants have to pay people to deal with fly ash.
At the same time, with the promotion of the dual-carbon target, the development and promotion of low-carbon cement has become an important direction for the transformation and upgrading of the cement industry. Professor Zhai Guanjie, chief expert of Fly Ash Research Institute of Dezhou University, has been engaged in the research of fly ash recycling and geopolymer cementitious materials for a long time. Zhai Guanjie believes that relying on fly ash solid waste resources to produce geopolymer cement is an important direction to solve the problem of fly ash disposal and realize the low-carbon transformation of cement enterprises.
According to Professor Zhai Guanjie, geopolymer cement has the advantages of fast setting, fire resistance, acid resistance, salt resistance, cold resistance, weathering resistance, high compression resistance, high bending resistance, freeze-thaw resistance, radiation resistance, alkali-free aggregate reaction and binding heavy metal ions (including nuclear power plant waste), and is a new generation of multi-functional inorganic non-metallic materials. Its performance covers the basic properties and some functions of cement and ceramics. Academician Della Roy praised geopolymer cement as "chemically bonded ceramics (Chemically Bonded Ceramics)" and wrote an article in Science to promote this new technology. Geopolymer concrete has been industrialized in Europe and the United States, the most typical representative of which is the Wellcape Airport with pure geopolymer concrete built by Wagner Company of Australia.
Geopolymer cement can theoretically replace traditional cement in all directions. At present, the most common applications at home and abroad are as follows: small volume concrete components (national highway isolation piers, acid-resistant pipelines, firewalls, all kinds of building bricks, roadside stones, foam insulation materials), rapid repair engineering, civil air defense engineering, nuclear power plant construction, artificial reefs (marine ranches), marine concrete components, shotcrete, steel structure fireproof and anticorrosive coatings, chemical acid-resistant anticorrosive, Sealing of heavy metal ions, storage of nuclear waste, treatment of some hazardous wastes, etc. Case: solidification treatment of waste incineration fly ash (hazardous waste).
Professor Zhai Guanjie said that geopolymer cement is the direction of transformation of small and medium-sized grinding stations, which can make full use of the surrounding cheap bulk solid waste resources, adopt special technology, and can be produced on a large scale.
In order to help cement enterprises cross the cycle and make green transformation, China Cement Network is scheduled to hold the 16th China Cement Energy Conservation and Environmental Protection Technology Exchange Conference and the 1st Solid Waste Comprehensive Utilization and Fluidized Solidified Soil Development Conference in Wuhan, Hubei Province from December 3 to 4, 2026. At the same time, the "2026 Cement Kiln Co-disposal of Hazardous Waste Capacity Ranking List" was released. At that time, Professor Zhai Guanjie will come to the scene to give a wonderful report and share in detail the related technology and application results of producing oligomer cement with fly ash.
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