Cement material for solidifying radioactive waste and use method thereof

By introducing retarders with sulfonic acid groups and five-membered ring structures into cement-based materials, the problem of insufficient retention effect and cracks on cement-based radioactive waste curing materials on nuclides is solved, and efficient nuclear The stability of the carbon retention and cured body is improved.

CN119118607APending Publication Date: 2024-12-13CHINA TEST & CERTIFICATION INT GRP CO LTD
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Patent Information

Application Number
CN202411184233.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-27
Publication Date
2024-12-13

AI Technical Summary

Technical Problem

The existing cement-based radioactive waste curing materials do not have enough retention effect on nuclides, and cracks are prone to occur during the curing process, affecting the integrity and stability of the cured body.

Method used

Using a retarder containing sulfonic acid groups and five-membered ring structure and a phosphorylation water reducing agent, the hydration reaction of Ca2+ is delayed, thermal stress is reduced, and molecular chains are improved by regulating the hydration reaction and forming a dense hydration adsorption layer. Stiffness, reduce porosity, and optimize the fluidity and construction properties of cement materials.

Benefits of technology

It significantly improves the retention effect of nuclides, reduces the cracks and porosity of the cured body, enhances the tensile strength and construction properties of the cement material, and ensures the integrity and stability of the cured body.

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Abstract

The invention belongs to the field of radioactive waste disposal, and particularly discloses a cement material for solidifying radioactive waste and a using method thereof.The cement material is prepared from, by weight, 60-75 parts of a cement base material, 1-2 parts of a retarder, 0.2-0.7 part of a water reducing agent and 2-5 parts of fly ash, and the retarder comprises sulfonic acid groups and a five-membered ring structure. The cement curing material is suitable for solid radioactive wastes, and the cured product has few cracks, low porosity and good retention effect on nuclides.
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