A kind of light-transmitting concrete body and preparation method thereof

Abstract

The invention relates to concrete materials, discloses a light-transmitting concrete body and a preparation method thereof, and solves the problems of low overall strength and low durability of the existing light-transmitting concrete body due to the weak bonding interface between the optical fiber and the cement matrix and rapid aging, The main point of the technical solution is a light-transmitting concrete body, which is formed by embedding optical fibers in concrete and curing the concrete. The amount of optical fibers added accounts for 5-20% of the volume of the light-transmitting concrete body. Carry out pretreatment, and described pretreatment comprises the following steps: Y1: Soak treatment with 3.5~4.6wt% dodecylbenzyl ammonium chloride aqueous solution for 1.5~2h, which improves the strength of the bonding interface between the optical fiber and the cement matrix, and at the same time It also simultaneously slows down the aging of the optical fiber in the alkaline environment of the light-transmitting concrete body, and then enhances the stability of the combination of the optical fiber and the cement matrix, and improves the overall strength and durability of the light-transmitting concrete body.

Description

technical field [0001] The invention relates to concrete materials, in particular to a light-transmitting concrete body and a preparation method thereof. Background technique [0002] The light-transmitting concrete body is a relatively new type of concrete material, and it is widely known for its use in the Italian Pavilion of the Shanghai World Expo. The light-transmitting concrete body is a light-transmitting concrete body obtained by embedding optical fibers in concrete and curing the concrete. When the light irradiates one side of the light-transmitting concrete body, the light is introduced from the optical fiber on this side and transmitted along the optical fiber to the other side of the light-transmitting concrete body. One end on one side, thus making the concrete appear light-transmitting. [0003] During the current use of the light-transmitting concrete body, it is found that the addition of an appropriate amount of optical fiber (generally the limit is 20% of ...

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Problems solved by technology

[0003] During the current use of the light-transmitting concrete body, it is found that the addition of an appropriate amount of optical fiber (generally the limit is 20% of the volume of the light-transmitting concrete body calculated according to the mold) has little effect on the timely strength of the concrete, mainly reflected in the embedded optical fiber The compressive strength of the light-transmitting concrete body decreases, and with the increase of fiber content, the compressive strength continues to decrease, but the flexural / compressive strength ratio gradually increases; but when the fiber content is high (volume When the fiber doping ratio is higher than 5%), the flexural strength gradually decreases with the increase of the fiber doping amount, but when the fiber doping amount is low (volume ratio does not exceed 5%), the flexural strength is higher than that of the unburied fiber Translucent concrete body slightly improved

[0004] The reason is that the optical fiber embedded in the concrete also plays the role of strengthening the fiber, but the interface between the optical fiber and the cement matrix is ​​relatively fragile, and the optical fiber embedded in the concrete for a long time is affected by the alkaline environment of the concrete. The aging of the optical fiber surface is rapid during repeated repetitions, resulting in further damage to the original fragile bonding interface, and the optical fiber is prone to slipping or even pulling out, which reduces the overall strength and durability of the light-transmitting concrete body, so it needs to be improved

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