Structural Protection Mat (SPM)

Developed using a blend of thermoplastic materials and elastomeric inclusions to form a polymeric alloy. Sheets of FC444 are laid on the structure (typically bridge decks) before laying the ballast.

Edge joining strips 75mm wide are used for welding sheets together using simple heat gun technology, providing a continuous layer to protect the bridge structure against the abrasive effects of the ballast.


Physical Properties

Test Method Conditions Data Units
Tensile Strength ISO 37 5.4 MPa
Elongation at Break ISO 37 250 %
Abrasion Resistance Taber 3000 cycles, 1000g 0.69 g loss
Abrasion Resistance Taber 3000 cycles, 1000g 0.23 mm loss
Electrical Resistance BS 903pt. C2 100v dc 1.1 x 1011 Ωcm
Thickness (Nominal) 4.5 mm
Weight 5.2 kg/m2
Water Absorption 0.008 g/cm3

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