Recycled concrete: No shortage here

I see gray piles of crushed concrete as I’m driving by construction sites, looking like gigantic abandoned sandbox projects. We’re likely to see more of these piles as green concepts permeate the building industry.

 

According to the Concrete Network, recycling concrete from demolition project can result in considerable savings since it saves the costs of transporting concrete to the landfill (as much as $ .25 per ton/mile), and eliminates the cost of disposal (as high as $100 per ton). This savings to the contractor also results in greater environmental benefits, such as protecting natural resources, fewer pollutants from the transport of materials and reduced impact on our landfills.

Palo Alto’s “construction and demolition” program requires 90% of concrete and other inert solids be diverted. Santa Clara requires 50% to be recycled. San Jose, most of the cities within San Mateo county (and the County itself), and nine cities in Alameda county have also implemented these reuse and recycle programs.

Recycling of concrete is a relatively simple process. It involves breaking, removing, and crushing existing concrete into a material with a specified size and quality. The goal of a green remodeler is to use as much onsite as possible, says Iris Harrell of Harrell Remodeling.

Concrete Technology gives five applications of unprocessed recycled concrete, then five different applications after processing, including new concrete. So concrete really can be recycled into more concrete!

The photo is at 3270 West Bayshore as seen from 101. Other concrete piles can be seen at 899 Charleston and at Page Mill and Park. All are in Palo Alto.