Conductive material co-doping conductive concrete and preparation method thereof

Abstract

The invention provides a conductive concrete compounded with conductive materials and a preparation method thereof. The concrete is composed of cement, silica fume, carbon fiber, carbon nanomaterials (carbon nanotubes + carbon black + graphite), nano-zinc oxide, water reducing agent, filling Material, dispersant, defoamer, and water. The preparation method of the multifunctional conductive concrete mixed with conductive materials is simple and the performance is excellent. Replacing some carbon fibers with carbon nanomaterials has lower cost and stable electrical conductivity than traditional conductive concrete. Adding nano-zinc oxide can significantly improve the electrical conductivity of concrete. In the case of electrification, the concrete has good electrothermal performance, and it is applied to airport pavement, bridge deck and cement concrete pavement. It can melt ice and snow, detect road loads, cracks and expansion of concrete structures; It has good electromagnetic properties, can effectively shield electromagnetic waves, reduce electromagnetic radiation, and reduce electromagnetic interference.

Description

technical field [0001] The invention relates to the field of building materials, in particular to conductive concrete compounded with conductive materials and a preparation method thereof. Background technique [0002] The problem of ice and snow accumulation on road surface in winter has always been the biggest problem in road maintenance in cold regions of our country. In the Northeast and Northwest of my country, snow falls early in winter and lasts for several months. The severe ice and snow weather is extremely unfavorable to the smooth flow of roads, railways, highways and airports and driving safety, and brings many inconveniences to people's life and production. In 2008, ice and snow covered 19 provinces across the country, causing large-scale traffic congestion and paralysis, and huge losses. [0003] At present, the main methods of deicing and snow removal are manual and mechanical snow removal and chemical snow removal, but manual snow removal is time-consuming,...

AI Technical Summary

Problems solved by technology

The installation and construction of the geothermal pipe method is obviously complicated; the infrared heating lamp method is easily affected by the surrounding wind direction, and the temperature rises slowly, which is not conducive to rapid snow melting

Due to the movement of traffic, the heating wire will be pulled out of the asphalt concrete pavement layer; the fluid heating method needs to establish a system for melting ice and snow, but the construction of the system itself is troublesome, and the device requires a lot of capital investment. The hot water system is not easy to arrange, and it is more difficult Control, the heating effect is not ideal, when the automatic control system fails and the PVC pipe leaks, the hot water control system must stop working; the steel fiber in the steel fiber conductive concrete will rust in the concrete, and the resistance will increase with age increase

[0005] Scientists have been experimenting with the manufacture of conductive concrete since the 1990s. Adding a small amount of conductive steel fiber or carbon fiber to the concrete, although the proportion is less than 1%, can make the Concrete has a conductive effect; if the conductive concrete is compacted, the conductive fibers in the concrete will be dense, which will improve the conductive effect of the concrete. The price of carbon fiber is high, and the resistivity of the prepared conductive concrete is relatively high, so it does not take advantage of large-scale use