Achromatic uniform light-emitting concrete and a method for producing the same

By using specific components and processes in uniformly luminescent concrete with no color difference, the problems of hydrolysis failure and sedimentation of luminescent powder in cement systems have been solved, achieving efficient and uniform luminescence effects and visual consistency, thus meeting the requirements of building appearance.

CN122355643APending Publication Date: 2026-07-10BEIJING ZHUZONG COMMERCIAL CONCRETE CENT
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING ZHUZONG COMMERCIAL CONCRETE CENT
Filing Date
2026-04-24
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing technologies suffer from several problems: luminescent powder is prone to hydrolysis failure in strongly alkaline cement systems; high-density luminescent materials are prone to gravitational settling leading to uneven luminescence; and conventional physical coating techniques significantly reduce luminescence efficiency.

Method used

The formula employs white silicate cement, refined quartz sand, uncoated rare-earth-doped strontium aluminate luminescent powder, rutile titanium dioxide, sodium polyacrylate, sodium gluconate, sodium aluminate, strontium nitrate, polyvinyl alcohol, and sodium tetraborate. By premixing sodium polyacrylate, strontium nitrate, and sodium aluminate in the mixing liquid phase, the surface adsorption of sodium polyacrylate is used to inhibit the hydrolysis reaction of strontium aluminate. Polyvinyl alcohol and sodium tetraborate are cross-linked to form a polymer network, which provides physical support and prevents gravity sedimentation. At the same time, rutile titanium dioxide is introduced to improve visual color difference and luminescence uniformity.

Benefits of technology

It achieves chemical stability of luminescent materials in a strongly alkaline cement matrix, prevents gravitational settling, improves luminescence efficiency and visual luminescence uniformity, eliminates color difference on concrete surface, and meets the engineering requirements for the homogeneity of building appearance.

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Abstract

This invention discloses a color-difference-free, uniformly luminescent concrete and its preparation method. Addressing the problems of easy hydrolysis and sedimentation of luminescent powder in alkaline cement, and the significant reduction in luminescence efficiency due to physical coating, the invention uses white silicate cement, refined quartz sand, uncoated rare-earth-doped strontium aluminate luminescent powder, and rutile titanium dioxide as the base mixed raw materials. During preparation, a multi-component liquid phase containing sodium polyacrylate, sodium gluconate, sodium aluminate, strontium nitrate, polyvinyl alcohol, and sodium tetraborate is added to the slurry in a stepwise manner and stirred. This invention utilizes the interfacial adsorption and local common ion effect of sodium polyacrylate to construct a thermodynamically balanced microenvironment around the luminescent powder, preventing hydrolysis. Simultaneously, the cross-linking of polyvinyl alcohol and sodium tetraborate forms an in-situ transient rheological network to prevent luminescent powder sedimentation. As cement hydration proceeds, the gel automatically disintegrates, and titanium dioxide approaches the luminescent interface, generating light scattering to eliminate color difference. High-brightness, uniform luminescence in concrete can be achieved without physical coating.
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