UHPC high performance concrete is a kind of cement-based composite material. It is a kind of hydraulic cementitious material, which is made of cement as cementing agent, combined with various aggregates and additives. Compared with other building materials, concrete has the characteristics of low energy consumption, wide raw material sources, simple process, low cost, durability, fire protection, strong adaptability and convenient application. From the perspective of social development and technological progress, concrete is still the most widely used and most widely used building material in the future for a long time.
I. characteristics of UHPC ultra high performance concrete
1. UHPC has been used as the outer protective layer of steel structure of offshore oil platform, which can greatly improve the service life of pillars in water level fluctuation area.
2. UHPC has a rapid development in early stage and high strength in later stage. It can be used to replace steel and expensive organic polymer in reinforcement and repair engineering. It can not only keep the integrity of the concrete system, but also reduce the cost.
3. UHPC has high strength and good impact resistance. It can be used in the protective structures of national defense projects and special structures that need high bearing capacity.
4. The high density and good working performance of UHPC make the surface of UHPC in contact with formwork have high smoothness. It is difficult for harmful media to invade into UHPC, and the colorant and other components in UHPC are not easy to separate out. Therefore, UHPC can be used as exterior decoration material of buildings.
2、 Application scope of UHPC ultra high performance concrete
1、 With the high strength of UHPC, the size of structural members can be reduced and more space can be obtained. UHPC can be used to build bridges with longer span and larger clearance, and reduce the cross-section size of columns at the bottom layer of high-rise buildings, so as to obtain more usable area.
2. The high tensile strength and corrosion resistance of UHPC can be used to make oil and gas pipelines instead of large diameter thick wall steel pipes with high cost, which can significantly improve the pipeline durability and reduce the cost.
3. UHPC is a kind of low permeability nuclear waste container.
4. It is used in military and security fields to manufacture anti explosion and anti shock devices.
5. On site repair, structural reinforcement, etc.
