Because of its superior mechanical properties and good durability, concrete has been widely used in the construction industry for many years. However, the electrical conductivity of concrete is poor, especially in a dry environment. In the electric, electronic and military construction industries, concrete with excellent mechanical and electrical properties plays an important role. For example, to eliminate road ice, the traditional method can achieve the purpose of deicing by heating the road surface, but its installation cost is high and the process is too complicated, and the use of conductive concrete will be very different.
A team led by the Institute of Building Materials, National Institutes of Architecture Research Institute of Canada, under the leadership of Dr. James Bouton, developed a new type of mechanical performance in May 2003, with strong electrical conductivity. Performance of concrete. This kind of conductive concrete is made by adding conductive materials such as carbon fiber, graphite and coke slag (an inexpensive by-product from the steel production process) to the cement to form a continuous conductive network. Its production formula is based on the principle of current filtration, when the current in the composite circuit increases to a certain critical point, its conductivity will increase several times at once. Above this critical point, even if the amount of current continues to increase, the electrical conductivity of the composite material does not increase much. Therefore, it is required that the amount of current must just exceed the critical point so as to ensure that the concrete has both excellent conductivity and mechanical properties and good mixing performance.
Conductive concrete can be made by adding conductive concrete particles and fibers into traditional cement aggregates in two ways. One is a traditional mixing method. The concrete thus produced has a high compressive resistance, and at the same time the resistivity is also high. Relatively high. Another method is to use the mud penetration method, which can increase the concrete's compressive resistance and elasticity, and its resistivity is low.
Conductive concrete can be used as both structural concrete and conventional concrete. Conductive concrete is lighter than conventional concrete, its weight is 70% of that of conventional concrete, and the thermal stability of conductive concrete is not inferior to conventional concrete at all. The manufacturing process of conductive concrete requires only conventional mixing and pouring equipment, and its usage. Basically similar to conventional concrete.
Conductive concrete can be used with specially laid electrodes and electric devices to de-ice roads, walkways, decks, and runways. When used as a capping layer, it can be used as an anode auxiliary material to protect the system because of its low resistance, producing a uniform current on a wide road surface, and reducing the anode current density. At the same time, as a covering layer, excellent mechanical stability is also provided due to its carrying capacity and bonding strength. And because conductive concrete can attenuate electromagnetic and radio wave interference, it can also be used to shield computer equipment and protect electrical equipment and electronic devices from interference.
Advantages ☆ Conductive concrete has excellent mechanical properties and electrical conductivity.
☆ Lighter weight than conventional concrete.
☆ It is easy to produce and can be produced without any special equipment.
☆ It is safe for pedestrians to walk on live concrete roads.
☆ The building can be protected against the effects of static electricity and lightning, and it can reinforce the steel layer and protect the steel in the concrete structure from corrosion.
☆ It can absorb more than 90% of electromagnetic energy, and it is cheaper and more convenient than any current method of shielding electromagnetic energy.
The conductive concrete technology has been granted a U.S. patent, and this technology was adopted by the Department of Civil Engineering at the University of Nebraska-Lincoln in June. Conductive concrete was used as a deck covering to eliminate snow and ice buildup.
A team led by the Institute of Building Materials, National Institutes of Architecture Research Institute of Canada, under the leadership of Dr. James Bouton, developed a new type of mechanical performance in May 2003, with strong electrical conductivity. Performance of concrete. This kind of conductive concrete is made by adding conductive materials such as carbon fiber, graphite and coke slag (an inexpensive by-product from the steel production process) to the cement to form a continuous conductive network. Its production formula is based on the principle of current filtration, when the current in the composite circuit increases to a certain critical point, its conductivity will increase several times at once. Above this critical point, even if the amount of current continues to increase, the electrical conductivity of the composite material does not increase much. Therefore, it is required that the amount of current must just exceed the critical point so as to ensure that the concrete has both excellent conductivity and mechanical properties and good mixing performance.
Conductive concrete can be made by adding conductive concrete particles and fibers into traditional cement aggregates in two ways. One is a traditional mixing method. The concrete thus produced has a high compressive resistance, and at the same time the resistivity is also high. Relatively high. Another method is to use the mud penetration method, which can increase the concrete's compressive resistance and elasticity, and its resistivity is low.
Conductive concrete can be used as both structural concrete and conventional concrete. Conductive concrete is lighter than conventional concrete, its weight is 70% of that of conventional concrete, and the thermal stability of conductive concrete is not inferior to conventional concrete at all. The manufacturing process of conductive concrete requires only conventional mixing and pouring equipment, and its usage. Basically similar to conventional concrete.
Conductive concrete can be used with specially laid electrodes and electric devices to de-ice roads, walkways, decks, and runways. When used as a capping layer, it can be used as an anode auxiliary material to protect the system because of its low resistance, producing a uniform current on a wide road surface, and reducing the anode current density. At the same time, as a covering layer, excellent mechanical stability is also provided due to its carrying capacity and bonding strength. And because conductive concrete can attenuate electromagnetic and radio wave interference, it can also be used to shield computer equipment and protect electrical equipment and electronic devices from interference.
Advantages ☆ Conductive concrete has excellent mechanical properties and electrical conductivity.
☆ Lighter weight than conventional concrete.
☆ It is easy to produce and can be produced without any special equipment.
☆ It is safe for pedestrians to walk on live concrete roads.
☆ The building can be protected against the effects of static electricity and lightning, and it can reinforce the steel layer and protect the steel in the concrete structure from corrosion.
☆ It can absorb more than 90% of electromagnetic energy, and it is cheaper and more convenient than any current method of shielding electromagnetic energy.
The conductive concrete technology has been granted a U.S. patent, and this technology was adopted by the Department of Civil Engineering at the University of Nebraska-Lincoln in June. Conductive concrete was used as a deck covering to eliminate snow and ice buildup.
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