In many areas, protecting the environment by not allowing the hydrodemolition wastewater to flow off the structure and into fresh water streams is very important. Equally important is protecting the public safety by not allowing hydrodemolition wastewater to flow across live traffic lanes. The ultimate method to achieve these two important goals is to specify “Dry Hydrodemolition®”.
Hydrodemolition wastewater (slurry water) contains a high level of suspended solids with a high pH. Collecting the wastewater at the source, the hydrodemolition robot, ensures the water will all be collected. Dry Hydrodemolition will accomplish this task. By attaching our vacuum trucks directly to the robot, we are able to capture 95% + of the wastewater directly from the robot. This process is most effective when doing shallow removal or scarification. Dry Hydro® has been used on multiple bridge deck projects where it was important to prevent waste water from running into live traffic.
Rampart’s hydrodemolition equipment uses less than 50% of the water required by others using low pressure (<20,000-psi)/high water volume units. As a result, our vacuum trucks are able to capture wastewater during the hydrodemolition process. Even at our relatively low flow rates (but ultra-high pressure – 35,000-psi), our trucks can reach capacity within in 1.5 hours. Normally, once the truck is full it has to stop working and leave the site to dump the wastewater. Rampart’s trucks were specifically designed to overcome this potential ongoing delay to production. Our trucks are equipped with a hydraulic discharge pump. This pump can quickly pump the water from the vac truck to the treatment area or tanker. And it can do this while the truck continues to vacuum the wastewater. So production is not impacted.
Dry Hydro also offers the advantage of cleaning some of the debris at the same time. While this method cannot collect all the debris, it will begin the cleanup process thus making cleanup following hydrodemolition go faster.
Dry Hydro is very effective for shallow removal and scarification. However, the method is less effective when performing rebar exposure.