As infrastructure networks age and traffic demands increase, the long term protection of bridges, overpasses, culverts and other critical concrete structures has become a top priority for engineers and contractors.

Within the Saint-Gobain group, GCP’s internationally proven waterproofing technologies - available in South Africa through Chryso Southern Africa - are providing advanced solutions for both new construction and rehabilitation projects. These products, including BITUTHENE® 5000 and ELIMINATOR® Bridge Deck Waterproofing, are engineered to extend service life, improve safety and reduce costly maintenance on vital transport infrastructure.

BITUTHENE® 5000 is a heavy duty composite membrane developed for use beneath hot-applied asphalt concrete wearing courses. It incorporates a moisture and water resistant rubberised asphalt layer reinforced with a puncture and heat resistant polypropylene mesh, providing dimensional stability, flexibility and excellent adhesion.

Supplied in rolls with a protective release paper for easy handling, the membrane is cold applied, requiring no heating or hot bitumen bedding. It is suitable for both new construction and repair applications, offering effective waterproofing for bridges, overpasses and other vehicular traffic structures as well as parking decks.

In rehabilitation projects, BITUTHENE® S5000 strips are recommended for restoring concrete pavements with asphalt overlays, preventing premature deterioration caused by reflection cracking and sub-base erosion. The membrane’s high resistance to water, combined with its ability to remain flexible over extreme service temperatures, ensures performance even during harsh winter cycling over small cracks.

On structures where detailing is critical, BITUTHENE® Liquid Membranes and BITUTHENE® 5000 Mastic can be used to seal terminations, edges and overlaps, ensuring complete waterproofing integrity.

“BITUTHENE 5000 is designed with the realities of modern infrastructure projects in mind,” Andries Janse van Rensburg, Business Development Manager – Specialty Building Materials at Chryso Southern Africa, says. “Its robust construction, flexibility and proven ability to withstand extreme conditions make it a trusted choice for protecting concrete structures against water ingress and deterioration. The fact that it is cold applied means faster, safer and more consistent installation on site.”

The ELIMINATOR® Bridge Deck Waterproofing membrane offers equally impressive performance for steel and concrete bridges which are constantly exposed to water, chlorides and frost - conditions that can lead to deterioration and even structural failure.

This cold spray-applied system is based on ESSELAC® advanced resin technology, creating a fully bonded composite layer between the bridge deck, waterproof membrane and asphalt surfacing. The result is a membrane that withstands punishing climate conditions and heavy traffic loads while maintaining its bond and integrity.

ELIMINATOR® can be applied in virtually any climate, curing in just one hour even in high humidity or low temperatures, preventing costly weather delays and allowing for greater scheduling flexibility. A two colour application process enables on-the-spot quality assurance, while the membrane’s ability to withstand asphalt surfacing temperatures up to 250°C eliminates overcoating time constraints and accelerates project completion.

“ELIMINATOR has a proven global record of protecting thousands of bridges over decades of service,” Janse van Rensburg adds. “Its rapid curing time, adaptability to almost any climate and long term durability are significant advantages for contractors and road authorities who cannot afford prolonged closures or recurring maintenance. It is a cost effective way to protect the substantial investments made in these essential structures.”

With proven track records on thousands of bridge and concrete structures worldwide, both BITUTHENE® 5000 and ELIMINATOR® provide engineers and contractors with reliable long lasting waterproofing systems. Supplied in South Africa by Chryso Southern Africa, these GCP technologies safeguard critical infrastructure against water ingress, chloride attack and freeze-thaw damage, extending service life, enhancing safety and reducing the long term costs associated with maintenance and repair.