“It is this kind of innovative thinking that makes Ontario’s roads the safest in North America while protecting our environment.”
Joe Tierney,
Former Executive Director, Ontario Good Roads Association
Case Study
Featured Case Study
Alternative paving methods in Haldimand County lead to sustainable results, energy savings and an ORBA Green Leadership and Sustainability Award for Walker.
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Haldimand County, Ontario
More than half of the roadwork completed used cold recycled mix in place of traditional virgin aggregate for resurfacing.
Walker Construction (formerly Norjohn Contracting and Paving) used alternatives to traditional paving methods in Haldimand County to reduce energy and resources consumed during granular conversion and road resurfacing. Walker developed an innovative cold in-place recycled asphalt mix using recycled materials instead of virgin aggregate to resurface 75,000 m2 of a total 139,000m2. This new method delivered a cleaner, more enjoyable ride for motorists and an upfront cost savings to the municipality. It also successfully achieved equivalent strength and improved seal over the traditional method.
By placing its cold recycled mix and bonded wearing course product, Walker achieved a 95 percent decrease in the use of virgin aggregate and a 17 percent decrease in asphalt emulsion. Energy savings amounted to the equivalent of 200,000 L of gasoline or one year of electricity consumption for 221 Ontario homes.
95% decrease
in the use of virgin aggregate resources.
33,166 tonnes
of recycled material used.
6.6M MJ energy savings
equivalent to 200,000 L of gasoline or one year of electricity to power 221 homes.
Award-Winning Innovation and Sustainability in Construction
The Haldimand County project earned Walker the ORBA Green Leadership and Sustainability Award for its demonstrated environmental stewardship, innovative thinking and sustainable approach to construction. The award comes from a partnership between the Ontario Road Builders’ Association (ORBA), the Ministry of Transportation (MTO) and the Ontario Good Roads Association (OGRA). It recognizes environmental leadership and sustainability measures in the construction of Ontario’s transportation infrastructure. The award supports new products, innovations in equipment, best management practices and construction methods that align with sustainability and environmental protection objectives.