Ordinary concrete is to point to take cement as cementitious material, sand and stone as aggregate, mix through adding water, pour shape, set solidify into have certain strength "artificial stone material", namely cement concrete, it is the concrete variety that USES most on the project at present.
1.Abundant sources of raw materials.About 70% of the material in concrete is sand and stone, a local material, can be used locally, avoid long-distance transport, so the price is low.
2. Convenient construction.Concrete mixture has good fluidity and plasticity, which can be poured into various shapes and sizes of components and structures according to engineering needs.It can be cast on site or prefabricated.
3. The performance can be designed and adjusted according to the needs.By adjusting the variety and quantity of each component material, especially by adding different additives and admixtures, concrete with different construction workability, strength, durability or special performance can be obtained to meet the different requirements of engineering.
4. High compressive strength.The compressive strength of concrete is generally between 7.5 and 60MPa.When the water reducer and admixture are added, the strength can reach more than 100MPa.In addition, concrete and steel have a good match, cast into reinforced concrete, can effectively improve the low tensile strength defects, so that concrete can be used in various structural parts.
5. Good durability.The concrete with correct raw material selection, reasonable ratio and good construction and maintenance has excellent impermeability, frost resistance and corrosion resistance, and has a protective effect on steel reinforcement, which can keep the long-term use performance of concrete structure stable.
