Joint Sealing


Joints between concrete slab building elements are designed to accommodate contraction and/or expansion movement of the element and avoid random cracking. This movement is due primarily to the initial shrinkage of newly cast concrete and subsequent thermal induced cyclic movements associated with ambient temperature variations, solar radiation and/or certain in service conditions which impose significant thermal or moisture changes. Similar joints are formed around plinths and pedestals again to accommodate movement and isolate application of loads to adjacent structural elements.

Concrete slab joints are sealed to prevent ingress of foreign materials which would prevent joint movement, prevent water or chemical solution ingress into subsoils whilst accommodating extremes of movement, withstanding various chemical attack and temperature variations and allowing vehicular and or pedestrian passage.

Concrete slab joints are subject to many factors which influence their design and service life and in severe conditions this service life can be compromised. Joint performance is no longer functional once the seal is breached. Accordingly, Duratec possess the understanding of concrete joint functionality, the correct sealant selection and installation practices necessary to maintain the integrity of concrete joints.

Click on the links below to view some of our joint sealing project experience:

Gorgon WWIP Concrete Bund Protection
Gorgon Nib Wall Construction
Tronox Chandala Joint Sealing