Method for producing light transmitting concrete with light transmitting mode design

Abstract

The invention discloses a method for producing light transmitting concrete with light transmitting mode design and belongs to the field of novel building materials. Plastic optical fiber with transmittance of more than 90% is used, and the diameter of the optical fiber is in a range from 0.5mm to 1.5mm. Firstly, the optical fiber is spun into optical fiber cloth, all fiber monofilaments in the optical fiber cloth are arranged in parallel in a warp direction or a weft direction, distances among the fiber can be adjusted and controlled to be in a range from 3mm to 6mm, and cotton yarn is used for fixing in the warp direction or the weft direction. Then, the surface of the optical fiber is processed by a coupling agent, the optical fiber cloth is fixed in a test die in accordance the design, high-liquidity high-strength cement mortar is poured, the cement mortar is cut, ground and polished after being hardened, and the light transmitting concrete is obtained. By the aid of the light transmitting concrete, the designed light transmitting mode and effect are achieved, and the volume fraction of the optical fiber in a block can be reduced to 2-5%. The light transmitting concrete has wide application prospects in fields such as promotion of energy-saving building illumination and construction decoration and is a novel third generation light transmitting cement concrete material.

Description

technical field [0001] The invention belongs to the technical field of new building materials. In particular, it relates to a method for preparing light-transmitting concrete with high light transmission, high strength and low cost. Compared with the second-generation light-transmitting cement-based materials, this cement-based light-transmitting material has the advantages of simple preparation process, good optical fiber positioning effect, low cost, optical fiber volume content can be reduced to 2-5%, and good and stable light transmission performance. , and high strength and other characteristics, 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. What ...

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Problems solved by technology

[0004] 1) High material cost: the volume content of optical fiber can reach up to about 30%, resulting in high manufacturing cost of light-transmitting cement-based materials

[0005]2) The preparation of 3D or 2D fabrics is difficult: due to the smooth surface of the optical fiber, the cross-section is round, and the material is hard and brittle, it is not easy to bind and fix it when weaving. It is difficult to weave 3D or 2D fabrics with axial warp knitting machine

[0006] 3) The light transmission effect and decoration of the material are difficult to guarantee: the light transmission effect formed by parallel bundles of glass fiber bundles is only the effect of fiber stacking, and it is not easy to design special graphics; the optical fibers in 3D or 2D fabrics are prone to bending , sliding dislocation, or even slipping out, it is difficult to achieve the expected positioning effect, and it is difficult to give full play to the light transmission ability of the optical fiber, resulting in the reduction of the light transmission efficiency of the material and the deterioration of the decorative effect

[0007]4) The strength of the material is low and the durability is poor: due to the fact that parallel optical fibers are densely paved in the warp and weft directions in 3D and 2D fabrics, it greatly improves Reduce the inhomogeneity of the cement matrix material, thus greatly reducing the strength of the material

Moreover, the choice of glassy multimode optical fiber will be corroded by calcium hydroxide, a product of cement hydration, and its durability cannot be guaranteed.

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