Vibration Control, Single & Multiple Cell Culverts

The use of the 20mm Projex Damtec SBM (sub-ballast mat) has proven benefits and technical properties to that of using more traditional methods of culvert protection.

Clients use Projex Damtec SBM on various types of culverts, small and large, as:

Projex Damtec SBM is easier to assemble and install then a compacted bedding mix
Projex Damtec SBM is cost efficient for the initial construction and the whole of life cost for the culvert(s)
Projex Damtec SBM provides superior weight distribution over the whole of the structure
Projex Damtec SBM is not affected by soluble salts, organic matter and other deleterious matter/particles
Projex Damtec SBM has superior manufactured granular material, which is free of organic matter
Projex Damtec SBM is resistant to electrical sensitivity, pH, chloride and sulphate contents
Projex Damtec SBM is environmentally friendly, manufactured from recycled rubber
Projex Damtec SBM is extremely strong and durable
Projex Damtec SBM has high kinetic absorption
Projex Damtec SBM has tested and proven properties in insulation for acoustic and vibration and secondary borne vibration to surrounding environs and adjacent structures
Projex Damtec SBM provides protection to the sensitive sealing (waterproofing) layer against damage and uneven settlement, which may affect the structure
Sub-structure rigidity and long term track geometry stability

The Projex Damtec 20mm Sub-ballast mat (SBM) is extensively used on culverts, bridges and plain rail track in Australia, Europe, North America and various other countries with outstanding results over the whole of life costs. The use of the sub ballast mat ensures superior performance and durability in excess of 50 years.