There are two types of expansion joint filler, foam and fibreboard. When working with concrete you should use fibreboard, which offers flexibility across the surface of concrete, allowing movement that will prevent cracking.
Where are expansion joints?
Expansion joints occur through all parts of a structure to provide complete separation through floors, walls, ceilings, and roofs (interior & exterior).
How thick should expansion joints be?
Tips for placing concrete expansion joints Make sure joints are cut deep enough: they need to be at least a quarter of the thickness of the slab. For a 100mm slab, cut the joints at least 25mm deep. If you're cutting joints after the concrete has been poured, don't leave it too long.
What is spacing of expansion joint?
Joints are commonly spaced at distances equal to 24 to 30 times the slab thickness. Joint spacing that is greater than 15 feet require the use of load transfer devices (dowels or diamond plates).
When should you use expansion joints in concrete?
Expansion joints are put in place before the concrete is poured. Expansion joints are used to allow the slab to move and not put stress on whatever it abuts. These joint are placed where a slab meets a building, where a slab meets another slab, and where a pool deck meets the coping.Nov 3, 2015
What is a floor expansion joint?
Floor expansion joints are critical technical profiles, they absorb thermal expansions in floors, thus avoiding fractures and positively affecting the quality and duration of the materials installed.Jan 6, 2021
What is a seismic separation joint?
A seismic joint typically creates a separation between the adjacent buildings or parts of buildings that includes separation of walls, floors, roof and, in the case of joints within the same building, may also include separation, or accommodation for movement of piping, HVAC ducts, and other elements that have a Feb 8, 2017
How do you hide expansion joints?
https://www.youtube.com/watch?v=ftZ-rNix1aQ
What is the purpose of an expansion joint *?
Expansion joints are used to absorb thermal expansion. They can also be used to absorb contraction in cryogenic lines and to reduce vibration in piping systems. Materials of construction for the bellows can be stainless steel or rubber or even a composite material.
What is a roof expansion joint?
An expansion joint cover is what you see on a roof, and it allows the roof membrane to expand and contract in sync with the roof deck, without compromising the roof system. Roof expansion joint covers are typically just called “expansion joints”.
What is the meaning expansion joint?
Definition of expansion joint 1 : a coupling (as of steam pipes) designed to permit an endwise movement that compensates for expansion or contraction resulting from temperature changes. 2 : a joint or gap (as in concrete work) designed to permit expansion or contraction resulting from temperature changes.