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[GreenYes] Re: Green Concrete?


To: ZERI_Practitioners@no.address, Gary Liss <gary@no.address>
From: Katje Sana Erickson <KATJEDID@no.address>
Date: Wed, 29 Mar 2006 16:13:41 -0700
Subject: Re: [ZERI_Practitioners] Fwd: [GreenYes] Re: Green Concrete?

Cement Can become an ally...

...during my research within our ZERI-EI Project
in Durango, CO '05, I came across a British firm
pioneering 'Eco-Cement' made from magnesite instead
of limestone burned in energy hog kilns. Magnesite
from the sea floor and from high rift valleys (former
geological time sea floors) like New Mexico and parts
of S America, S Africa, and Australia. Yes, I did find
magnesite areas near Bernardo, NM on my hikes...

Magnesite based cement uses 90% less heat in kilns,
absorbs CO2 from the atmosphere, and continues to do
so 2-3 years after pouring in place until final stable
curing...

I've designed for NM Travertine Marble here and
tried to spread the word since NM, USA is so ripe for
assisting a better future in so many ways, and because
of the traditional lime kilns all about TX, NM, and AZ,
burning volcanic lime balls for quick-lime. I would fear
that mining our resource would become detrimental but,
it seems capable of being offset by eco-remediation.

This earth is our ally more often than not.
May we pay attention to her prompts interdependently.

-- Katje Erickson, 864-3993, cell 264-8512
Stewardship and Sustainable Architectural
Design, Illustration, Energy Conservation.
www.deltathird.com email: katjedid@no.address

At 11:42 AM 3/29/2006, Robert Kirby wrote:

>i agree that permeable pavement is a good thing, but I just can't let
>over-the-top green-washing pass.
>
>The manufacture of Portland Cement is the second (to the production
>of steel) largest industrial generator of greenhouse gases in the
>world. If you include the limestone industry that services the
>cement industry, it is the largest. The industry has historically
>been opposed to any recognition or regulation of its CO2 emissions.
>It also lobbied mightily to increase the budget of the recent federal
>roads boondoggle, and to keep public transportation out of the bill.
>
>The one factual question i have to the excerpt below is: so where do
>the heavy metals go after they filter into the concrete? They just
>kind of disappear without leaching into the soil? And the
>hydrocarbons? The concrete naturally spawns hydrocarbon-eating
>microbes? If the microbes are in the concrete, are they not in the
>soil? Then why don't we just dump waste oil on the ground and let
>the wonderful microbes eat it? I think some people near the pipeline
>in Alaska might question that. Hell, I think people with wells
>living near the local gas station might question that.
>
>Concrete is an integral part of our daily lives, and a necessary
>material. I simply hate seeing an industry without good
>environmental credentials thump its chest about a particular product
>and ignore the rest.
>
>Bob Kirby
>
>
>On Mar 27, 2006, at 4:25 PM, Concrete Is Green wrote:
>
>Pervious
>Concrete mitigates the heavy metals, oils, & grease from cars, and from
>adjacent asphalt pavement, as well as fertilizers from lawns. This is
>a highly effective way to return to a more natural system where
>pollutants are mitigated by the pervious concrete and the microbes that
>naturally colonize the moist, aerobic environment it creates.
>

Gary Liss
916-652-7850
Fax: 916-652-0485
www.garyliss.com

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