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  1. A concrete expansion joint, or control joint, is a gap between two concrete slabs. It allows the concrete to move when it expands and contracts due to temperature changes. Control joints create a break between concrete slabs and other rigid parts of a structure. They allow movement without causing stress which helps prevent cracking.
    gambrick.com/what-are-concrete-expansion-joints/
    The expansion joint typically consists of a compressible filler material, such as cork, rubber, or foam, that is placed between two concrete slabs. The filler material is flexible and provides a space for the concrete to expand into, reducing stress and preventing cracking. This foam is also called isolation strip material
    www.everything-about-concrete.com/concrete-exp…
    Strips of compressible foam or asphalt sheeting make good expansion joints, and a 2-inch layer of sand can isolate a slab from the footing. Expansion joints separate the slab from structures such as foundation walls, footings, and structural support columns, and allow the slab to move unrestrained both horizontally and vertically.
    www.jlconline.com/how-to/foundations/joints-in-con…
    A concrete expansion joint – or control joint – is a gap which allows the concrete to expand and contract as/when the temperature changes. It forms a break between the concrete and other parts of a structure to allow movement without causing stress, which can lead to cracking.
    www.heidelbergmaterials.co.uk/en/ready-mixed-co…
    A typical concrete expansion joint consists of a filler material encapsulated by a sealant. The filler creates the separation gap while the sealant protects the joint from intrusion by debris. Expansion joint placement, materials, and installation details are all important considerations when incorporating them into a project.
    civilenggblitz.com/concrete-expansion-joints/
  2. Standard Details - Sika USA

  3. Expansion Joint in Concrete – Types and …

    To prevent harmful effects due to concrete movement, several expansion joints are incorporated in concrete construction, including foundations, walls, roof expansion joints, and paving …

  4. Understanding Concrete Expansion Joints - Civil Engineering Blitz

  5. what is a CONCRETE EXPANSION JOINT? - Everything About …

  6. Types of Concrete Joints and Their Purpose - Concrete …

    Jun 22, 2020 · Information on creating and placing joints in a concrete slab. Covers the main three types of concrete joints as well as tips for placing joints on decorative concrete surfaces.

  7. Types of Joints in Concrete Construction – …

    Expansion joints are virtually never needed with interior slabs, because the concrete doesn't expand that much—it never gets that hot. Expansion joints in concrete pavement are also …