Electromagnetic shielding concrete and preparation method thereof

Abstract

The invention relates to an electromagnetic shielding concrete and a preparation method thereof. The electromagnetic shielding concrete is characterized by comprising gelled material, aggregate, fiber, water reducing agent and water, wherein the gelled material is formed by cement and inorganic mineral admixture, and the inorganic mineral admixture is formed by siliceous dust and at least one of coal ash and ground slag; the aggregate is formed by coarse aggregate and fine aggregate, the coarse aggregate is common cobblestones with the particle size of 5-20mm; the fine aggregate is formed by sand, steel grit and graphite powder; the fiber is formed by steel fiber and carbon fiber; the proportion of the components is as follows: water 175-180kg / m3, aggregate 1725-1760kg / m3; the mass percentage of the components in the aggregate is as follows: 35-40 percent of fine aggregate and 60-65 percent of coarse aggregate; the water to binder ratio is 0.32 to 0.34; the volume doping of the steel fiber is 0.8-1.2 percent of the volume of concrete, the mass doping of the carbon fiber is 0.6-0.8 percent of the mass of the gelled material, and the mass doping of the water reducing agent is 0.5-2.0 percent of the mass of the gelled material. The electromagnetic shielding concrete can effectively shield electromagnetic radiation with the frequency of 100MHz-1.5GHz, and can effectively utilize waste, and has low cost and wide application.

Description

Technical field [0001] The invention belongs to the field of building materials, and specifically relates to an electromagnetic shielding concrete and a preparation method thereof. Background technique [0002] With the rapid development of electronics and communication technology, electronic components are gradually miniaturized and highly integrated, and electronic instruments and meters are gradually lightweight and high-speed, making electronic components and instruments extremely susceptible to electromagnetic interference, which may lead to malfunctions and serious consequences. ; And electromagnetic radiation will also leak information, making computers and other instruments without information security; in addition, electromagnetic radiation also brings hidden dangers to people's lives and military safety, and similar reports are common at home and abroad. Therefore, electromagnetic radiation has become a new source of pollution and is listed as the world's third largest ...

AI Technical Summary

Problems solved by technology

Most of the research on electromagnetic shielding concrete at home and abroad is concentrated below 10GHz, the cost is high, the source of raw materials is limited, the shielding efficiency is low, the preparation process is complicated, etc., and it is mainly used in the field of military engineering, and less involved in the civilian field.