Barium slag-based cementitious material, preparation method and application

By combining modified porous fibers and activated carbon, the problem of heavy metal leaching from barium slag under long-term environmental aging is solved, enhancing the stability and mechanical properties of cementitious materials, making them suitable for use in building materials.

CN122277207APending Publication Date: 2026-06-26UNIV OF SCI & TECH BEIJING +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Filing Date
2026-05-07
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Barium slag contains a large amount of acid-soluble barium, which is difficult to remain stable under long-term environmental aging, leading to the leaching of heavy metals and affecting the mechanical properties and environmental safety of building materials.

Method used

Modified porous fibers and activated carbon are used, and hydroxyl polyacid compounds are grafted onto them with isocyanate-based silane coupling agents to enhance the adsorption capacity for heavy metal ions, improve interfacial bonding, and improve the aging resistance of the material.

Benefits of technology

This study achieved the stability and heavy metal adsorption effect of barium slag-based cementitious materials under long-term environmental aging, thereby improving the mechanical properties and environmental safety of building materials.

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Abstract

This invention belongs to the field of solid waste recycling technology, specifically relating to a barium slag-based cementitious material, its preparation method, and its application. The cementitious material comprises the following raw materials in parts by weight: 400-450 parts barium slag, 80-130 parts blast furnace slag, 125-175 parts waste incineration fly ash, 70-100 parts desulfurized gypsum, 20-35 parts modified porous fiber, and 10-15 parts activated carbon. The modified porous fiber is prepared by a method including the following steps: 1) blending polyolefin, mesoporous molecular sieve, and pore-forming agent, extruding and granulating, melt spinning, removing the pore-forming agent, and plasma treatment to obtain porous fiber; 2) modifying the surface of the porous fiber with an isocyanate-based silane coupling agent, and then grafting hydroxyl polyacid compounds to obtain modified porous fiber. Activated carbon and mesoporous molecular sieves can enhance the adsorption and retention capacity of heavy metal ions; modified porous fibers can chelate barium ions and other heavy metal ions, and can also improve the dispersibility of modified porous fibers in cementitious materials, thereby improving mechanical properties and synergistically enhancing the long-term environmental aging resistance of activated carbon.
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Citation Information

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