Application of nanotechnology in concrete
Concrete is the basic building material and widely used in a variety of buildings and structures. Since the 21st century, concrete engineering is upsizing, the engineering environment becomes complicated, and the ever-expanding application fields, people have put forward higher requirements for concrete materials. Nanotechnology can improve the performance of concrete and greatly expand the application.
Nanomaterials can effectively improve the performance of concrete
1. Nano silica/SiO2
Nano SiO2 powder is a superfine powder with silicon or silicone chloride hydrolyzed to form hydroxyl groups on the surface. In the field of cement concrete, nano silica can increase the strength and durability of concrete due to its strong pozzolanic activity, micro-aggregate filling effect and nucleation.
2. Carbon nanotubes
The carbon nanotubes are tubular, light in weight, and the hexagonal structure is perfectly connected, which is a good high-strength fiber material. The proper amount of carbon nanotube powder into the cement can effectively improve the pore structure and microcracks of the material, and play a bridging role, thereby improving the mechanical properties of the cement substrate. get details about carbon nanotubes price from https://www.hwnanomaterial.com/.
3. Nano calcium carbonate
Nano CaCO3 is a low-activity mineral micropowder material with a cost of about one-tenth that of nano-SiO2. After being doped with nano calcium carbonate powder, under the combined action of micro-aggregate effect and crystal nucleus effect, the bulk density is increased, which helps to improve the flexural and compressive strength. The nucleation of nano-calcium carbonate can refine the crystal form, improve the interface structure and improve the durability of concrete.
4. Nano carbon fiber
Nano-carbon fiber is a novel nano-carbon material which is formed by the rolling of a layered graphite sheet. Compared with carbon nanotubes, it has a relatively low cost and has a great advantage in production. Study found that the addition of nano-carbon fiber not only makes the concrete have excellent pressure-sensitive properties, but also improves its mechanical properties.
Nanotechnology expands the application of concrete
1. Concrete that absorbs electromagnetic waves
2. Purifying air concrete
3. Antibacterial concrete
4. Automatic humidity control concrete
5. Ecological concrete
6. Smart concrete
High-performance, high-functionalized concrete as a high-tech in the field of building materials provides a new opportunity for the development of traditional building materials. The development of traditional concrete materials is entering the track of technological innovation. Among them, nanomaterials and nanotechnology will play an increasingly important role in improving the durability and functionality of concrete.