Concrete Beam Capacity
What is Concrete Beam Capacity? Concrete is an artificial rock consisting of fine cement, water, natural gravel, and sand. Engineers divide Concrete into many types according to the use and components of its Concrete Beam Capacity manufacture.
Cement is soft, gray-colored material engineers distinguish by its hardness that adheres to the presence of water. It contains three main components: “calcium carbonate, silica, and ammonia.”
Water is one of the most necessary concrete components, contains an appropriate degree of ductility between cement, natural gravel, and sand, and has a greater concrete volume.
A set of properties must be available in the water used in concrete manufacture, which comes as follows: The water used in concrete manufacture must be completely free of oils and grease. Avoid using water containing salts, acids, organic matter, or cork.
Supplying water is considered the best for making concrete. Engineers Non-potable water can use in the concrete formation, provided that the percentage of impurities does not exceed the limit set by the specifications.
Concrete made from non-potable water is tested in the laboratory to ensure its concrete strength, so it may take 7 to 28 days to examine the concrete force after seven days.
Natural aggregate is gravel of various sizes, includes 70 to 75% of the concrete mass, and is the main factor for the durability of the whole concrete.
The natural grit of the concrete block contains stability and resistance to various weather factors such as moisture and drought and reduces the occurrence of volumetric changes in the concrete.
The percentage of concrete beam capacity after seven days to 28 The process of checking concrete strength percentage and its resistance to compression is divided into two stages. The initial examination begins after seven days when the concrete strength percentage should reach 70%.
In the second examination, after 28 days of manufacture, the strength percentage should be between 90 to 100%. Sometimes, the strength of the concrete in the first examination after seven days reaches 90%, which means there is no need for a second examination after 28 days.
Method of testing Concrete Beam Capacity
The first step: is by using 6 to 9 metal cube molds of one size, which is 20 * 20 * 20 cm, plus a metal rod 50 cm long, 0.16 mm in diameter. The cube molds must be clean, without any impurities, and then the walls of the cubes are coated with oil to facilitate the process of dismantling the next day of hardening. Concrete is poured into the formwork, in three layers, with each layer well compacted with a compactor. The last stage comes in the first step, by leveling the concrete with trowels to record all data related to concrete from the date of casting, its type, and caliber.
In the second step, Engineers Keep the cube molds in a place away from the sun, high heat, and vibration to maintain their properties during the solidification stage, cover them well, and the next day they are disassembled and numbered each block.
In the third step, Engineers immerse cubes in water, and after seven days, engineers take concrete samples with all tensile strength and pressure tests applied immediately after removal from the water.
Source: wikipedia.org/wiki/Reinforced_concrete
Read More: buildineg.com/public/blog/what-is-a-concrete-jacketing-of-column/
