Method for preparing carbon fiber conductive concrete with melting snow and ice function

Abstract

The invention provides a method for preparing carbon fiber conductive concrete with melting snow and ice function, and belongs to the technical field of concrete. The method for preparing carbon fiber conductive concrete can be widely used for concrete pavement engineering construction of bridge decks and airport runways. The raw materials include cement, short carbon fibers, an admixture, sand, stone, and water, wherein water cement ratio is of 0.55-0.58, the mass of cement, sand and stone respectively account for 18%-25%, 20%-45%, and 20%-45% of total mass of the concrete, and the carbon fibers have a length of 7-13 mm and account for 0.6%-2.0% of the whole volume of the concrete. In the preparation process, the mixed water and admixture are poured into cement mortar, and then the short carbon fibers are added, and finally the stones are added to prepare the carbon fiber conductive concrete. The carbon fibers can be uniformly dispersed in the concrete, and the prepared carbon fiber conductive concrete can make use of the electrothermal effect to melt snow and ice.

Description

technical field [0001] The invention relates to a preparation method of carbon fiber conductive concrete with the function of melting snow and ice, belongs to the technical field of concrete, and is suitable for the concrete pavement construction of bridge decks and airport runways. technical background [0002] In winter, snow and ice on roads have a very bad impact on traffic. On the method for clearing road snow and icing, traditional method is to adopt artificial method and mechanical method. The manual method is time-consuming and laborious, and cannot restore traffic in time; although the mechanical method is fast, the removal is not thorough, and the utilization rate of deicing machinery is low. In addition, the commonly used methods are chemical melting methods, such as spraying deicing salt, but deicing salt will reduce the durability of pavement concrete. [0003] Adding conductive phase materials to ordinary concrete to prepare conductive concrete, using the ele...

AI Technical Summary

Problems solved by technology

However, if the length-to-diameter ratio of graphite is too small, it must be added in a large amount to form interconnected conductive paths in the concrete, which will lead to a significant reduction in the strength of the prepared concrete, so it cannot meet the road use requirements; adding a certain amount of steel fiber It can also significantly reduce the resistivity of concrete, but steel fibers will form an oxide layer on the surface in the alkaline environment of cement, resulting in a significant increase in resistivity

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