In the early years of the 20th century, the use of concrete in the construction of buildings was limited to the construction of dams and roads. The use of concrete as a building material in the USA was not until the 1950s. In that decade, however, the use of concrete as a building material increased exponentially, as the need for flood-proofing buildings became obvious. Today, different types of concrete are manufactured for the construction of buildings, each with its own special features and properties.
When it comes to concrete, the size is of great importance. The aggregates used in the construction of concrete can be classified as either fine or coarse. The size ranges from 0.001 to 0.25 inch. The coarse aggregates are larger than these and range from 0.25 to 1.5 inches. All aggregates must be free of vegetable matter, soft particles, or organic soil compounds that may cause chemical reactions that will seriously affect the strength of the concrete.
When making concrete, it is important to consider the composition of the mixture. Ordinary construction usually uses a nominal mix of 1:2 cement to sand gia be tong tuoi . The amount of each of these materials depends on the type of project. A design mix depends on the finalized proportions of the ingredients to ensure the right strength for the structure. During the construction process, concrete is mixed in different types of machines, such as a kiln or a mixer.
The size of aggregates is critical when making concrete. Generally, it will range from 0.001 to 0.025 inch. The size of the fine aggregates is 6.5 to 38 mm, while the coarse aggregates range from 0.25 to 1.5 inches. These aggregates need to be clean and free of any vegetable or soft particles. These substances may cause chemical reactions that can seriously affect the strength of the concrete. Soil composition also plays a crucial role in the strength of concrete.
The strength of a concrete is measured in kilograms per square centimeter. It is measured in pounds per square inch, which is equal to the weight of a pound. The strength of concrete depends on many factors, including humidity, temperature and the amount of cement. If the concrete is too dry, it will experience unequal tensile stresses and will not harden properly. To counteract these problems, curing the new concrete is a good idea. The process will slow down shrinkage and ensure that the final product will be stronger than before.
Regardless of the purpose of the concrete, it is a powerful substance. It is inexpensive to produce and has a high durability, allowing it to withstand a wide range of natural disasters. Unlike other types of materials, the strength of concrete is highly dependent on the water content in it. A diluted concrete will not be strong, and the moisture content will cause it to crack. Moreover, the strength of concrete depends on the water content in the mix. Its chemical composition can influence the durability of a structure.