High-strength conductive aggregate applied to conductive concrete and preparation method of conductive aggregate

Abstract

The invention discloses a high-strength conductive aggregate applied to conductive concrete and a preparation method of the conductive aggregate. The conductive aggregate is characterized by being prepared from following four components in percentage by mass: 70-93 percent of clay, 1-6 percent of iron powder, 1-10 percent of Fe3O4 and 5-14 percent of polyacrylate-styrene copolymer. The preparation method is implemented according to the following steps: (1) pretreating the clay and synthesizing the polyacrylate-styrene copolymer; (2) weighing all the components; (3) pressing a mixed material of all the components into a columnar blank body by adopting a dry-pressing method; and (4) sending the blank body into a reducing atmosphere furnace for roasting to obtain the high-strength conductive aggregate. The conductive aggregate prepared by the method disclosed by the invention has the advantages of low cost, good conductivity, excellent mechanical properties and the like and is applied to the conductive concrete, so that the concrete can present good conductivity and mechanical properties.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a high-strength conductive aggregate used for conductive concrete and a preparation method thereof. Background technique [0002] Conductive concrete refers to a multiphase composite material formed by adding an appropriate amount of conductive component materials to ordinary concrete. Conductive concrete not only has the characteristics of structural materials, but also has conductivity. As a structural material, conductive concrete is also used in electrical engineering, electromagnetic interference shielding, industrial anti-static, power equipment grounding engineering, steel cathodic protection, building floor heating and Deicing and melting snow on road surfaces play an important role. [0003] Conductive concrete has conductivity mainly because the conductive component materials dispersed in the matrix contact each other to form a conductive network. At pres...

AI Technical Summary

Problems solved by technology

However, the cost of conductive materials such as carbon fiber and steel fiber is high, and it is very difficult to uniformly disperse in cement stone, which cannot effectively form a conductive network, which seriously reduces the conductivity of conductive concrete.

Carbon-based conductive materials such as graphite and carbon black will significantly reduce the mechanical properties of conductive concrete due to their low strength and high water absorption.