Recycled concrete: No shortage here
August 15, 2007
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.
Landscapes Going Wild: City stats
July 18, 2007
So where are all of these Backyard Habitats?
Apparently, it’s a bit labor intensive to get the Certified Backyard Habitat stats city-by city. Thanks to Roxanne Paul of the National Wildlife Federation for sending this partial list before dashing off on her vacation.
Campbell: 12
Cupertino: 9
Los Altos: 16
Los Altos Hills: 3
Los Gatos: 14
Menlo Park: 4
Palo Alto: 17
Saratoga: 5
San Jose: 99
Santa Clara: 9
Landscaper Sherri Osaka told me today that she had one and they’re not that hard to do.
My parents’ first home was an Eichler in Sunnyvale and while they complained of the draftiness, I have fond memories of the sun streaming through the large windows. These large single-pane windows, however, were not exactly energy-efficient, but then again nobody really worried about heating bills back then.
In the era of $3.50/gallon gas, energy efficiency suddenly becomes a big issue, especially for the 2700 Palo Altans who live in an Eichler. Palo Alto Weekly recently had a great article on improving energy efficiency in Eichler homes.
I think this article may be even more valuable for Eichler homeowners outside of Palo Alto, since PG&E rates are greater than those of Palo Alto’s municipal utility. There are Eichlers up and down the Peninsula from San Francisco to Santa Jose, including 20 in tony Atherton.
Is there an Eichler tract in your city? (Say “yes” if you’re in San Francisco, Burlingame, San Mateo, Foster City, Menlo Park, Los Altos, Mountain View, Sunnyvale, Santa Clara, Cupertino, Saratoga, or San Jose. Wow!). By the way, Mike Ahern has mapped out many Eichler tracts in Santa Clara County. It inspired me to tour some of the Eichler neighborhoods I didn’t know about.
Palo Alto is definitely Eichler central, with 2,700 of the 11,000 built. We even have two neighborhoods (Green Meadow and Green Gables) in the National Register of Historic Places specifically because Joe Eichler built his modern suburban tracts here.
Do you have any interest in history or architecture? Check out PA Eichler tracts in other neighborhoods: Adobe Meadow/Meadow Park , Charleston Meadows, Community Center, Fairmeadow, Midtown, Palo Verde, South of Midtown, and Triple El.
