Characteristics and Types of Expansion Joints
Every head and expansion joint supplier has made expansion joints in a way that they are used to prevent broad cracks. Expansive cracks are formed because of temperature changes. They are usually placed in solid materials.
The solid materials undergo growth because of high temperature when in a restricted boundary, which leads to cracks. Expansion joints are provided in slabs, pavements, buildings, bridges, sidewalks, railway tracks, piping systems, ships, and other structures.
Characteristics of Expansion Joints:
- Expansion joints allow for thermal contraction and expansion without putting a load on the surrounding elements.
- An expansion joint is used to absorb safely the expansion and contraction of a variety of construction materials, as well as to absorb vibrations and allow for soil movement because of earthquakes or ground settlement.
- Expansion joints are typically found between bridge sections, asphalt slabs, railroad tracks, and plumbing systems.
- Expansion joints are used to withstand the load.
- A separation between pieces of the same material is all that an expansion joint is.
- In the construction of a solid block, the expansion joints are declared as control joints.
Types of Expansion Joint:
Bridge Expansion Joints:
These expansion joints allow for continuous traffic between structures while obliging movement, shrinkage, and temperature variations on strengthening and pre-load solid materials, complex, and steel structures.
Masonry Expansion Joints:
The heat and moisture absorbed by clay bricks expand. This will put a load of compression on the bricks and motor uplifting swelling and flaking. A joint replacing cement which is adhesive to elastomeric will absorb a load of compression without damage.
Railway Expansion Joints:
Expansion joints are not usually provided in railway tracks. If the track is set on a bridge, having an expansion joint, then it is mandatory to provide an expansion joint to ease the expansion in a solid material structure.
Pipe Expansion Joints:
The systems that bring high-temperature substances such as steam and exhaust gases, pipe expansion joints are used. They are also used to absorb movement and vibration.
Metallic Expansion Joints:
To prevent damage caused by thermal growth, vibration, pressure thrust, and mechanical loads in pipework or duct system, metallic expansion joints are used.
Rubber Expansion Joints:
They are malleable connectors. They comprise natural or synthetic elastomers and fabrics with metallic reinforcements. These provide load comfort in piping systems because of thermal changes. Rubber expansion joints reward lateral, torsional, and angular movements preventing damage.