It is composed of cement, sand, gravel and water, which is evenly mixed, densely formed, and hardened to form an artificial stone with a certain strength and durability. Also known as cement concrete, or simply "concrete".

Cement concrete, asphalt concrete, polymer concrete, polymer impregnated concrete, etc.

Fly ash concrete, silica fume concrete, ground slag concrete, fiber concrete, steel fiber concrete, etc.

Structural concrete, thermal insulation concrete, decorative concrete, large volume concrete, hydraulic concrete, marine concrete, road concrete, waterproof concrete, heat-resistant concrete, acid-resistant concrete, radiation-proof concrete, etc.

Ready-mixed concrete, on-site mixed concrete, commercial concrete, pumped concrete, sprayed concrete, roller compacted concrete, etc.

Plain concrete, reinforced concrete, steel mesh concrete, fiber concrete, prestressed concrete, etc.

Concrete partition walls are suitable for light concrete pouring

Plastic concrete (slump 10~90mm) Fluid concrete (slump 100~150mm) High fluidity concrete (slump ≥160mm) Dry hard concrete (slump <10mm)

Ordinary concrete

high strength concrete

ultra high strength concrete

①Raw materials are abundant and cost is low; ②It has good adaptability and the concrete mixture has good plasticity; ③ Bonds well with steel bars and generally does not corrode steel bars; ④High compressive strength and good durability; ⑤Convenient construction.

① Self-heavy weight (apparent density is about 2400kg/m3);

② It is a brittle material with low tensile strength (about 1/10 to 1/20 of the compressive strength) and poor deformation resistance;

③High thermal conductivity; ④Slow hardening;

⑤The production cycle is long and the quality of the construction process is difficult to control.

The main factors that should be considered when choosing cement are the uses of concrete;

Based on the above factors, →appropriately select the type and strength grade of cement.

According to different water sources, concrete mixing water and curing water are divided into: drinking water, surface water, underground water, recycled water, concrete enterprise equipment washing water and sea water, etc.

definition

Classification

Fine aggregate and coarse aggregate 1-6