Materials & Applications

Expansion Joints

Absorbing expansions and the contractions inherent to concrete buildings.

Designed to fill the gaps left between expansion joints in concrete slabs, Expandacork products absorb the vibrations, expansions and contractions caused by thermal variations in different construction systems. The joint fillers allow the movement of structures without causing damage and ensuring these spaced are filled.

Expandacork's unique flexibility enables its easy deployment and also its capacity to resist without any deterioration the continuous deformations caused by different climate conditions. Expandacork materials correspond to a long term compromise between performance, durability and mechanical resistance required on the high end projects of the construction industry.

Expandacork's key features

Explore projects with Expandacork

Qatar Foundation Headquarters

Expandacork - Type II.

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Doha Metro Green Line Underground (Qatar)

Expandacork - Type II.

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New Orbital Highway and Truck Route (Qatar)

Expandacork - Type II.

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Tecnhical Specifications

  Filling the Joint
Type II
Filling the Joint
Type III
Compression 50% of initial thickness with a load of between 0.35 MPa and 10.35MPa (50 to 1500 PSI)
Recovery 90% of original thickness following 50% compression, EXPANDACORK attains 95%
Extrusion There is a maximum extrusion level beyond the joint of 6.35mm (1/4'') when subject to 50% compression
Resistance to HCI Submerged into boiling HCI, Expandacork does not disintegrate
Expansion n.a. Submerged into boiling water for the period of one hour, Expandacork - self expanding cork type III expands by less than 40% of its original thickeness
Dimensional Variation n.a. Expandacork - self expanding cork type III does not display any sign of degradation even after the simulation of ten cycles of ageing and continues to completely seal the joint
Storage Expandacork should be preserved in its original packaging and in a dry place throughout its application
Density 120 - 180 250 - 370
Sheet size (mm) 915 x 610 915 x 610
Thickness (mm) 15; 20; 25; 30 * 15; 20; 25; 30 *
* Standard thickness dimension - available in other thickness upon request

The data provided in this table represents typical values. This information is not intended to be used as a purchasing specification and does not imply suitability for use in a specific application. Failure to select the proper product may result in either equipments damage or personal injury. Please contact us regarding specific application recommendations. Amorim Cork Composites expressly disclaims all warranties, including any implied warranties or merchantability or of fitness for a particular purpose. Amorim Cork Composites is not liable for any indirect special, incidental, consequential, or punitive damages as a result of using the information listed in this tabl. Any of its material specification sheets, its products or any future use or re-use of them by any person or entity.