CONSTRUCTION OF EXPANSION JOINTS

Expansion joints are used to separate individual components in the overall concrete surface thickness. Compared to the other types of joints, they can absorb significantly more movement, serve to relax concrete surfaces and prevent pressure from being transferred to adjacent components.

ROOM FOR
MOVEMENT.

CONSTRUCTION

Directly in the concrete layer by installing joint fillers or by subsequently cutting into the set concrete (see below).

Can be done directly in the new construction or in existing constructions during repair work later on

Cutting the joint chamber at full depth

Clearing out the expansion joint

Filling with compressible expansion joint material, e.g. rubber granules (recycled product), to the desired depth below the upper edge (UE)

Pouring the requested joint filling system into the remaining joint chamber up to the UE

Transfer of shear forces must be insured, if necessary, with a dowel bar retrofit or concrete sleeper

ADVANTAGES

High positional accuracy

Full thickness cut — no bridging / unintentional transfer of forces

Precise adherence to joint width by cutting with a set of diamond discs

Particularly suitable for several expansion joints in a row to reduce the longitudinal movements before changing the road surface material from concrete to asphalt

Reduction of longitudinal compressive stresses in older concrete surfaces to reduce the risk of heat damage (blow-ups)