Out of the archives: Protecting rural RMS bridges

Practical method for treating and protecting exposed rural concrete bridge decks


Under the auspices of RMS in NSW, these four bridges are located through the state’s central west and New England areas. This project was carried out in 2015. At that point the bridges were each about 30 years old. They are each of similar construction, with concrete pillars and decks supported by steel girder superstructure.

The intention of the works was to preserve the ageing exposed concrete decks, given the challenge of accessing them for regular maintenance, and the loaded traffic that uses them.

A painted coating was deemed inadequate due to the likely traffic wear.

One specific challenge was the need to minimize downtime, as the bridges are typically the sole vehicle route for the given remote area.


Solution and Outcome

MARKHAM’s original spray-applied hydrogel treatment was used in all cases.

Impact on downtime was minimized in three ways. Firstly, the treatment only requires 1-2 hours downtime in itself, before the concrete is trafficable. Secondly, one lane was treated at a time. Thirdly, nightworks were utilized in some instances, to accelerate the overall process.

These bridges are still fully functional at time of updating this case study (2024).

A more detailed case study is available to download and share.

Information on our CIVIL-TECT® system is also available for download.

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