What should I consider when choosing a reinforcement?
Reinforcing rod, commonly called reinforcement, is a steel rod that is placed in a wet concrete mixture. Rear increases the finished concrete to withstand greater stress and load. Rear also helps to control cracking.
When selecting a reinforcement, compare the size of the reinforcement to work requirements. Concrete reinforcement can be purchased in several sizes. For residential work, #3, 3/8-inch (1 cm) diameter, the challenge is commonly used in a flat part, while #4, 1/2-inch (1.3 cm) diameter and diameter #5, 5/8-inch), Rear is used in the walls.
Rear should be laid in a consistent pattern. The type of pattern and the distance between the rods depend on the project. The driveway is a typical 18 -inch (45.7 cm) grid, while two parallel bars of about eight inches (about 20 cm) are typical of each other.
Standard Rear section is 20 feet long (6 m), so more than one bar is usually needed to bridge the distance. When selecting a project reinforcement, remember that two non -nebish parts of the reinforcement may be laidend-to-end, while the ends overlap and connected together. The amount of overlapping is determined by the size of the reinforcement. The rod should overlap at least 30 times its diameter. For example, according to this rule, two bars #4 should overlap at least 15 inches (38 cm). The joints should be placed far from the corners of the project, which is an important point that needs to be considered when selecting the reinforcement layout.
Rear can be cut into desired lengths. There are several ways to reduce reinforcement. Hacksals or a reciprocal saw with a metal cut blade can be used for cutting a little more than in the middle of the bar. The pieces then disintegrated. A circular saw with a boundary blade can also be used. Likewise, the cutting torch can. The most effective way to reduce reinforcement.
Rear will strengthen the finished concrete only if it lies in the middle of the concrete thickness, so consider the location when selecting the reinforcement. The doubt should be increased on small blocks calleda chair that is right. Stone or waste concrete is a suitable choice for chairs. Bricks should not be used; They are so porous that they will pump water from the concrete mixture, resulting in a weakness of the finished product.
In projects that require less strengthening, other types of strengthening can be used. Weld wire fabric (WWF) or wire network is commonly used as a reinforcement material, especially for flat concrete. It helps to control cracking in finished concrete.
Wire Mesh used for residential buildings usually has six inches (15.2 cm) squares. It can be purchased in five feet of eight feet (1.5 to 2.4 m) leaves or in rolls of 50 feet (15.2 m). The leaves are easier to manipulate because it lies flat but rolls are easier to transport. Consider which features will make the work easier.
when determining Mesh conductors, overlapping sections of at least six inches (15.2 cm). Leave an open seam of about four inches (10.2 cm), where the control joints will be placed in the finished concrete.
Selection Rear Also includee Selection of the method for its location. Like the reinforcement, the wire mesh must be correctly placed, in the middle of the concrete thickness. The chairs can be raised wire network as well as reinforcement. The alternative method is to lay a wire mesh on the ground inside the molds. When the concrete is poured and stretched into the place, hang the wire with the rake and lift it to the center of the wet concrete using a fraying movement. Repeat it every few feet. The third method is to pour half of the concrete, place the wire mesh and pour and level the rest of the concrete.