Big Green: small scall forester

[VanGeem, Martha]

Try the American Tree Farm Certification system.
 

Martha G. VanGeem, PE (Illinois), MBA, LEED Accredited Professional
Principal Engineer & Manager, Building Science and Sustainability
Direct 847-972-3156
Cell 847-736-4366
Fax 847-965-5416
mvangeem at CTLGroup.com <mailto:mvangeem at CTLGroup.com> 

CTLGroup
Building Knowledge. Delivering Results.
5400 Old Orchard Road
Skokie, IL 60077-1030
www.CTLGroup.com 

 

________________________________

From: John Freiburger [mailto:frei at chorus.net] 
Sent: Monday, July 07, 2008 2:45 PM
To: VanGeem, Martha; Lisa Goodwin Robbins; Big Green
Subject: Re: Big Green: "greener" concrete


Question.

How does  a small scale sustainable forester get his wood graded so it
can be used in construction, if he is selling it himself?

Freiburger


On 7/7/08 8:39 AM, "VanGeem, Martha" <mvangeem at ctlgroup.com> wrote:



	Some rules of thumb:
	
	Specs generally limit flatwork exposed to deicer salts to a
maximum of 25% fly ash for durability reasons.
	
	You can use recycled concrete for !00% of the subbase, and the
coarse aggregate, but generally the fine aggregate should be virgin. 
	
	Whether you use your proposed mix or the rules of thumb, it is
best to test the mix to make sure it produces quality concrete. 
	
	Martha G. VanGeem, PE (Illinois), MBA, LEED Accredited
Professional
	Principal Engineer & Manager, Building Science and
Sustainability
	Direct 847-972-3156
	Cell 847-736-4366
	Fax 847-965-5416
	mvangeem at CTLGroup.com <mailto:mvangeem at CTLGroup.com>
<mailto:mvangeem at CTLGroup.com>  
	
	CTLGroup
	Building Knowledge. Delivering Results.
	5400 Old Orchard Road
	Skokie, IL 60077-1030
	www.CTLGroup.com 
	
	 
	
	
________________________________

	From: biggreen-bounces at lists.biggreen.org
[mailto:biggreen-bounces at lists.biggreen.org] On Behalf Of Lisa Goodwin
Robbins
	Sent: Monday, July 07, 2008 8:26 AM
	To: Big Green
	Subject: Re: Big Green: "greener" concrete
	
	
	For those of us who are not structural engineers, the July 2008
issue of The Construction Specifier has an introductory level article
about supplementary cementitious materials (SCM), like slag cement, fly
ash, and silica fume.  The article references ACI 318 for recommended
levels of SCMs and notes that different concrete design conditions may
lead to different SCM levels.  50% fly ash may be too high for concrete
in contact with de-icing chemicals. 
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