U concrete

U concrete is suitable for customizing personalized products and producing thin and slender concrete material with high aesthetic value and strong mechanical properties and durability. The shrinkage rate of u concrete can be effectively controlled by using high-strength and high white portland cement and special expansion agent to compensate shrinkage.

General Feature Performance

GENERAL

U concrete is suitable for customizing personalized products and producing thin and slender concrete materials with high aesthetic value and strong mechanical properties and durability. The shrinkage rate of u concrete can be effectively controlled by using high-strength and high white portland cement and special expansion agent to compensate shrinkage.

After the product is mixed with water in proportion, pigments can be added as required. The product has high fluidity. In the production process, fiber can be added to enhance its mechanical properties while maintaining self compacting performance.

FEATURE

Scope of application

◆Lightweight high-strength panel

◆Handicrafts made of concrete

◆Garden landscape, urban furniture, etc

◆Exterior wall, sun visor, decorative materials, etc

U concrete is suitable for customizing personalized products

PERFORMANCE

performance

T/CECS 10107-2020 Technical Requirements for Ultra High Performance Concrete (UHPC)

Testing items		Technical indEX
Compressive strength,		28d≥100MPa
Tensile strength,		28d≥5MPa
Flexural strength		28d≥ 10MPa
Fluidity (mm)	Initial60min	≥290≥260
Elastic modulus		28d≥40GPa

Main advantages

Low alkali corrosion resistance

U concrete has been used as the outer protective layer of steel structure of offshore oil platform, which can greatly improve the service life of the column in the water level change area.

U concrete is suitable for customizing personalized products

Ultra high strength

U concrete has high strength and good impact resistance. It can be used in protective structures of national defense projects and special structures requiring high bearing capacity.

High compactness

The high compactness and good working performance of U concrete make the surface in contact with the mold have a high finish. Using this feature, UHPC can be used as the external decoration material of buildings.

Cost reduction

The early strength of U concrete develops rapidly and the later strength is very high. It can replace steel and expensive organic polymers in reinforcement and repair projects, which can not only maintain the integrity of the concrete system, but also reduce the cost.

Packaging and storage

Packed in PP bags, with a net weight of 25kg / bag and a shelf life of 3 months; It must be stored in a dry and ventilated room, and the packaging bag shall be sealed. Avoid moisture and freeze.

Requirements for ultra high-performance concrete mixture

Item	Expansion degree	Extension time loss	Extension time
Requirements	≥650mm	≤100mm	3~10s

Requirements for mechanical properties of ultra high performance concrete

Classification	Item
	Compressive strength (MPa)	Tensile properties	Elastic modulus (GPa)	Flexural strength (MPa)
Structure class	≥120	Not lower than UT2	≥40	≥14
Unstructured class	≥100	Not lower than UT1	≥40	≥10

Shrinkage requirements of ultra high-performance concrete

Item	Natural curing	Thermal curing
Drying shrinkage/×10^-6	≤300	≤100
Early autogenous contraction/ ×10^-6	≤1000	/

Scope of application

1. Taking advantage of the high strength of UHPC, the size of structural components can be reduced and more use space can be obtained. UHPC can be used to build bridges with longer span and larger clearance; It can reduce the section size of columns on the ground floor of high-rise buildings and get more service area.

2. The high tensile strength and corrosion resistance of UHPC can be used to make oil and gas transmission pipelines to replace large-diameter thick wall steel pipes with high cost, which can significantly improve the pipeline durability and reduce the cost.

3. Use the high impermeability of UHPC to manufacture the integral container for the storage of medium and low-level radioactive nuclear waste.

4. Used in military and security fields to manufacture anti explosion and anti impact devices.

5. Site emergency repair, structural reinforcement, etc.

Application of UHPC in Bridge Pavement	Application of UHPC in anchor zone concrete of cable	Application of UHPC in urban traffic	Application of UHPC in precast box girder

Application of UHPC in subway decorative panel	Application of UHPC in exterior wall decoration	Application of UHPC in lightweight stairs	Application of UHPC in underground pipe gallery

Application of UHPC in building sun visor	Application of UHPC in polished concrete	Application of UHPC in building floor	Application of UHPC in sewage pipeline

Application of UHPC in transparent concrete	Application of UHPC in precast concrete members	Application of UHPC in seismic column of building lobby	Application of UHPC in city / home

Application of UHPC in anti explosion	Application of UHPC in technological	Application of UHPC in thin wall bent cap	Application of UHPC in cover plate

Construction process

1. Mix proportion

Powder: steel fiber: water = 100:10 ~ 30:10

2. Stir

Put the powder into the mixer, add water to mix for 3 ~ 4 minutes (the material reaches the colloidal state), add steel fiber to continue mixing (when the amount of steel fiber is large, it usually does not exceed 3%, which can be added gradually or in several times), pour after the steel fiber is evenly dispersed, vibrate and form, and finally maintain.

Remarks: the weight of each cubic meter of raw materials (excluding mixing water) is 2250kg; Performance index can be customized according to customer needs.

Packaging and storage

Packed in PP bags, with a net weight of 25kg / bag and a shelf life of 3 months; It must be stored in a dry and ventilated room, and the packaging bag shall be sealed. Avoid moisture and freeze.