[Greenbuilding] Flyash anyone?

[Beatrice Dohrn]

Nice thread.  THe ICF I am using is not polystyrene.  Made form demineralized woodchips.  Inserts can be mineral wool, polyiso,  or polysty.  

I know that some of you can apply yourself to my flyash quandry though. 

To repeat:

I have read the back and forth about flyash that went on some time ago,  and read the various attachments about the radioactivity issue.  I gather that as long as I don't get a particularly noxious supply of flyash in my concrete,  my house will be as safe as any.  

My question is how -- in very pratical terms --  I should go about assuring that I am not getting a noxious supply. I don't think buying and learning to use a geiger counter is likely to be practical.  I mean,  if I have to I will,  but if that's the way to gomaybe the $ isb etter spent on hiring a person who knows how.  

I know that I will have to test the concrete that comes to my site somehow.... but I cannot imagine sending a full truck back on pour day... so I am trying to figure out how to interview and test my suppliers at their plant in hopes that this will mean that what I get sent will not need to be sent back.  

Insights on how to organize this?  Thanks in advance. 


Beatrice Dohrn
541 746 1919 (h)
347 589 9053 (c)


--- On Thu, 5/29/08, Robert Tom <ArchiLogic at yahoo.ca> wrote:

> From: Robert Tom <ArchiLogic at yahoo.ca>
> Subject: Re: [Greenbuilding] Word for today: Wythe (was Re: Let's get practicalabout Flyash)
> To: "GB REPP" <greenbuilding at listserv.repp.org>
> Date: Thursday, May 29, 2008, 7:53 PM
> On Thu, 29 May 2008 21:12:12 -0400, Bob Korves
> <bkorves at winfirst.com>  
> wrote:
> 
> >>>>  instead of ICFs, ... might want to
> consider a double-wythe CMU
> >>>> sandwich wallwith Roxul (ie 
> non-plast-echh!, fire-proof,
> >>>> insect-immune, drainage capacity)
> >>>> super-insulation bewteen the wythes.
> 
> 
> >  Roxul makes quite a few different products. Which did
> you have in mind  
> > for using between masonry walls for
> > super-insulation, Tom?
> 
> Well Korves, any and all of them would be fine.
> 
> All of the product lines are basically the same material
> with the same  
> qualities WRT
> immunity to fire, insects and mould and all of them are
> water-repellent  
> yet vapour permeable and have the capacity to drain once
> the hydrostatic  
> pressure is relieved, should water somehow be forced into
> the material.
> 
> About the only real difference between product lines is
> density, with  
> corresponding variations in compression resistance and
> R-value.
> 
> But Roxul isn't the only material that would be
> suitable. Any material  
> with the same properties would do fine. ie NOT cellulose,
> fibreglass, straw
> 
> But just in case there might be any confusion, the
> superinsulation would  
> come from appropriate thickness rather than any special
> characteristic of  
> the material.
> 
> -- 
> === * ===
> Rob Tom
> Kanata, Ontario, Canada
> < A r c h i L o g i c  at chaffY a h o o  dot  c a >
> manually winnow the chaff from my edress in your reply
> 
> _______________________________________________
> Greenbuilding email list
>      Environmentally-preferable design, construction,
> building elements
> List info:
> http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.org
> List email: Greenbuilding at listserv.repp.org
> Managed by BuildingGreen, Inc. http://www.buildinggreen.com
>       publisher of Environmental Building News and
> GreenSpec
> Hosted and archived by REPP / CREST http://www.crest.org
> To get on the list:
>  
> http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.org
>   or
> mailto:greenbuilding-request at listserv.repp.org?subject=unsubscribe
> To get off the list:
>  
> http://listserv.repp.org/mailman/listinfo/greenbuilding_listserv.repp.org
>   or
> mailto:greenbuilding-request at listserv.repp.org?subject=unsubscribe