Municipality: City of Drummondville
Project: Pre-wetting of abrasives (5 mm stone)
Project specifications: improve snow removal operations
Timeframe: 2011 to 2018
Main customer challenges
First challenge
- Make the work of snow removal operators easier and eliminate time lost dealing with frozen clumps of sand
Second challenge
- Reduce the amount of road salt spread
- Increase driver safety at lower temperatures (salt begins to lose its effectiveness at -12 degrees Celsius)
- Budgetary considerations
Solutions recommended by Somavrac C.C.
- Solution to the first challenge: pre-wetting abrasives with an automated mixer
- Pre-wetting abrasive piles with liquid to make handling easier at low temperatures (down to -51 degrees Celsius)
Solution to the second challenge: on-board liquid for abrasives
- Installation of an on-site 40,000-liter buffer tank for liquid de-icer storage (29.6% concentration calcium chloride with corrosion inhibitor) for proactive spreader truck refills
- Spreader trucks equipped with an automated liquid spray system controlled by operators based on spreading charts developed by the city
- Before falling to the ground, the salt and sand in the truck body are sprayed with the de-icing agent for an immediate ice-melting effect
Results and customer impact
- 30% less salt in the environment
- Product effective down to -25 degrees Celsius
- Uniform, malleable piles at temperatures as low as -51 degrees Celsius
- Less loss through bouncing, as liquid enhances product ground adhesion
- Better long-term product effectiveness leading to fewer snow removal operations
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