What is the building joint?
When laying cement or concrete, sometimes the builder cannot lay the entire plate at the same time. Weather, time restrictions or lack of materials could stop the project in the middle. When this happens, the builder must leave an uniform stop point called the building joint. This joint is basically a straight line in concrete. If it is done correctly, the structural joint can double as a contraction joint, the joint placed in the concrete to avoid cracking of the plate.
The edge of the structural joint is formed by a partition. The partitions can be made of different materials, from plastic to steel to pre -created concrete. During the casting process and alignment, the partitions can double as fluctuations. The concrete is poured between the rails of the screed, the peaks of which are used as a guide when the concrete is aligned. When the board is finished, the bulkheads and the rails are normally removed.
The construction of the structural joint depends on the load from which the concrete is expected to carry. For a foot of transformer or small trafficVehicles, simple butt is the easiest. The butt consists of two concrete boards laid several millimeters apart and defined by partitions. If heavy vehicles are expected, the construction joint should be reinforced with a load transfer device.
Load transfer devices prevent cement boards from shifting during heavy loads. The shift can cause uneven boards and joint disintegration. Dowles, plate load or slots can be built into concrete to function as a load device. These devices are laid perpendicular to the structural joint and reach into both boards through the joint. Their purpose is to evenly divide the load between the plates.
In many cases, building joints can double as contraction joints. As the cement dries, it shrinks, resulting in cracking. Although cracking is almost impossible to prevent it, it can be controlled. Unless checking the LEDs can cause a nerveA fruit surface that is exposed to increased wear over time and water leakage, which can damage the substrate. The contraction joints are inserted into plates that lead cracks along the predetermined line.
The contraction joints can be created by cutting the groove into the plate or inserting plastic strips into the plate. The purpose of the joint is to weaken the board along the approved line so that the board bursts there somewhere else. To be effective, the contraction joint must be at least one quarter as deep as the board.