What are the advantages and disadvantages of cement concrete?

Cement concrete, as a commonly used building material, has the following advantages:

1. High strength: cement concrete has high compressive and tensile strength, and is able to withstand large loads and external forces.

2. Good durability: Cement concrete has good durability, can maintain stable performance for a long time, not subject to the erosion of the atmosphere, moisture, chemicals and so on.

3. Convenient construction: cement concrete material is easy to mix, pour and mold, suitable for construction of various building shapes.

4. Good economy: the raw materials of cement concrete are relatively inexpensive, which can make full use of on-site materials during the construction process and reduce the construction cost.

Cement concrete also has some disadvantages:

1. Low initial strength: the strength of cement concrete is low when it is just poured, and it needs a period of maintenance to reach the design strength.

2. Dry shrinkage and cracking: Cement concrete undergoes dry shrinkage during the drying process, which can easily lead to cracking, affecting aesthetics and durability.

3. Higher weight: Cement concrete is denser and heavier, which requires higher structural and foundation requirements, limiting its use in some applications.

4. Environmental impact: The production process of cement concrete requires a large consumption of water, energy and materials, which has a certain impact on the environment, while the carbon dioxide emissions generated will also exacerbate the greenhouse effect.