Method for preparing light-transmitting concrete by spinning optical fiber technology

Abstract

The invention relates to a method for preparing light-transmitting concrete by a spinning optical fiber technology, and belongs to the field of novel building materials. Organic multi-mode optical fibers with the diameter of 2 to 200mu m are adopted and spun into fiber cloth or a fiber integrated body according to a certain rule, the fiber cloth or the fiber integrated body is taken as a conductor for transmitting light rays to achieve special effects of transmitting light and images and the like of a cement concrete material, and the content of the optical fibers in a building block can be greatly reduced to 5-15 volume percent. The material has the advantages of high light-transmitting property and stability, convenient preparation process, designable decorative effect and the like, andis a novel second-generation light-transmitting cement concrete material.

Description

technical field [0001] The invention belongs to the technical field of new concrete materials. In particular, it relates to a preparation method of a cement-based light-transmitting material with high light transmittance and high durability. Compared with ordinary light-transmitting cement-based materials, this cement-based light-transmitting material has the characteristics of simple preparation process, saving more than 50% of optical fibers, and good light transmission performance. It has broad application prospects in the fields of promoting architectural lighting energy saving and architectural decoration. . Background technique [0002] Although there have been related reports on cement-based light-transmitting concrete, there are few reports on the specific material composition and preparation process of cement-based light-transmitting materials. Only the basic characteristics that are known are: a large number of optical fiber filaments are arranged in parallel The...

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Problems solved by technology

[0005] 2) Alkali corrosion is prone to occur: the existing preparation method is to use optical fibers to be embedded in the Portland cement concrete matrix in parallel to achieve light transmission, but since the optical fibers themselves are the first generation of optical fibers with glass as the core wire, it is easy to Alkali-silicate reaction with high alkalinity Portland cement matrix, causing glass core corrosion and affecting the durability of cement-based materials

[0006] 3) Shrinkage cracks are easy to occur: the volume of the Portland cement concrete matrix becomes smaller after hydration, the hardening shrinkage is relatively large, and the fibers are arranged in parallel, without the effect of restricting shrinkage, and shrinkage cracks are easy to form

[0007] 4) The light transmission effect of the material is not high: because the optical fiber bundles are mostly embedded in the cement matrix material in parallel arrangement, and the spatial structure distribution design of the optical fiber is lacking, the light transmission efficiency of the material is not high under the same fiber volume content.

[0008] 5) The preparation of the sample is difficult: the first generation of optical fiber with glass as the core wire is brittle, and it is easy to break during processing and molding; at the same time, the optical fiber bundle forming process cannot be densely vibrated, and it is easy to mix and change direction during the vibration process , if the above phenomenon occurs, it will seriously affect the light transmittance of the specimen, and the preparation of the specimen is difficult

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