Aggregates and recycling

At a glance

  • Amount diverted from landfill per year
  • 250,000-300,000 tonnes
  • CO₂ absorbed per year
  • ~15,000 tonnes

By recycling concrete, CO₂ is sequestered from the atmosphere after crushing due to the concrete’s exposure to the air.  LEED credits can be earned both by recycling demo from a project and by creating new structures with recycled Green-Stone aggregates.

Recycled aggregate: The time is now

Lock-Block Ltd. annually processes over 300,000 tonnes of concrete rubble from construction sites into high-quality aggregates suitable for making fresh concrete. That’s thousands of tonnes diverted annually from landfill sites, and made into useable products that we sell under the Green-Stone™ brand.

Leaders in green technology

Lock Block Ltd. uses a state-of-the art crushing, screening, and washing process that maximizes the potential of waste concrete rubble gathered from construction sites. Recycling “waste” into high-quality product, our on-site state-of-the-art TRIO CT crushing, screening and washing operation breaks down concrete rubble and:

  • Washes it three times to eliminate contaminants.
  • Removes metals and other building materials (these can be recycled and used in other environmentally friendly products).
  • Saves prep time and is emission-friendly.

The resulting aggregates:

  • Meet all ASTM test standards for concrete aggregate and MMCD tests for road base and granular fill.
  • Qualify projects for LEED® credits.
  • Can be made into ready mix with a recycled content of up to 100% that can have equal to or better specifications than traditional concrete.

Winner of the prestigious 2012 ASTTBC TechGREEN Award for our work in recycling, Lock-Block Ltd. minimizes our environmental impact. Currently, the only material that leaves our site is a small amount of wood and debris filtered out of our closed loop aggregate washing operation and we aim to make the leftover material from this process into a usable product. Our mortar dust residuals are a perfect liming agent for growing grass.

Call (604)325-9161 for pricing and ordering.  Spec sheets available on request.


Additional $0.50/tonne environmental fee on all aggregates. Prices subject to change without notice and to all applicable taxes. Testing data available upon request. $25 minimum charge + tax. While quantity lasts.