The Dri-Span Membrane
Concrete is highly porous and therefore susceptible to the infiltration of water and other chemicals. Left unattended, this can lead to the deterioration of bridge structures. A waterproofing membrane prevents moisture penetration, thereby ensuring maximum life for concrete bridges.
The Dri-Span Membrane is a specially designed and engineered bitumen product used for protection against typical corrosion conditions that exist on highway and railway structures. It is a perfect amalgam of engineering and architecture that is both durable and cost-effective. The Dri-Span Membrane keeps the underlying concrete safe from foreign particles like moisture, salts, chemicals and corrosive materials that can cause bridge failures in the long run.
Dri-Span membrane is 5mm in thickness and is prefabricated as a polyester reinforced Atactic Polypropylene (APP) modified bitumen roll. The membrane has the following compositional features:
Manufactured with premium APP resins, incorporating distilled bitumen and the latest generation of polyolefin techno polymers.
Reinforced with a non-woven continuous fiber polyester mat.
Stabilized with fiberglass thread to give the membrane a high longitudinal stability.
Instead of ceramic granules, the top layer is Silica Sand which does not impede bonding of the wearing surface to the membrane.
A crucial part of the Dri-Shield system and Dri-Span system combined
Used to waterproof concrete structures like bridges, highways, tunnels, railway tracks etc.
Prevents moisture, chlorides, salts and corrosive agents from reaching the underlying concrete.