Post-expansion refilling of Joints in concrete floors is provided by us for industrial and warehouse floors. The concrete floors exhibit movements during the initial first 6 to 18 months of laying.

Construction joints get shrunk over a period of time and open up comparatively around 8 MM to 10 MM or more depending upon pour size. Subsequently, polyurethane filler (i.e. ‘soft’ elastomeric sealant) which was installed initially on the sawn-induced joints, and construction joints; being soft material it permits a degree of movement or stretching as the joint opens but offers little protection to the joint itself.

Once the sealant reaches the limit of its elasticity, it splits or debond and hence should be replaced under general maintenance. As this may lead to joint deterioration, such as slight ravelling or wear of the joint arris under repeated trafficking and/or insufficient support from the mastic sealant.

The ability of a given joint to resist wear is also related to how wide the joint has opened and the relative size of the wheeled traffic it receives. The wider a joint opens and the smaller the wheels used on the floor, the greater propensity there is for joint damage. Small hard wheels, often found on collation trolleys or small pallet movers can inflict significant damage despite being relatively lightly loaded.

To address this we investigate floors after 12 months and execute post-expansion refilling in concrete with Epoxy-based PU whose Shore A hardness is between 60 to 80. The replacement of this initial ‘soft’ sealant with a ‘hard’ material provides significantly more protection to the edges/ arris of control and construction joints.

We undertake; cutting, cleaning & refilling of joints with high hardness sealant and grinding the surface edges to flush with adjacent floor levels.

• Size of Control Joint: 6 mm x 20 mm (depth of filling- 20 mm).
• Size of Construction Joint: 10 mm x 20 mm (depth of filling- 20 mm)