Win a copy of Pressure Canning for Beginners and Beyond
this week in the Food Preservation forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Anne Miller
  • Leigh Tate
  • jordan barton
  • Pearl Sutton
  • Nicole Alderman
stewards:
  • r ranson
  • paul wheaton
  • Greg Martin
master gardeners:
  • Carla Burke
  • John F Dean
  • Jay Angler
gardeners:
  • Nancy Reading
  • Mike Barkley
  • L. Johnson

Achieving High Thermal Mass with DIY Concrete Blocks Composed Of Crushed Granite.

 
Posts: 188
14
  • Likes 3
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I'm cross posting this idea from my original post at Donkey32Proboards.  http://donkey32.proboards.com/thread/3567/blocks-crushed-granite-cement-thermal?page=1&scrollTo=33373.

I have been pondering the best way to achieve high thermal density in a thermal mass bench without the expense of using blocks of cut granite, marble, or soapstone.  It occurred to me that using crushed granite of varying sizes as an aggregate would allow me to cast a solid dimensional block using concrete as a binder.

I did some looking and found that #10 and #57 granite (fine screenings and 1/4" to 1/2 inch pieces respectively), would likely permit a block to be cast that is 90 to 95 percent granite.  That's as close to granite as it gets.  While I'm presently tied up with my Recycled Natural Gas Water Heater to Solar Water Heater build, I'll likely not be getting around to testing this idea for some time, though no doubt I'll be looking up cheap and efficient ways to cast them.

If anyone has done this, or is willing to give it a go, I'd love to hear about how it performs.

In the Spirit of Sharing

Thomas
 
You had your fun. Now it's time to go to jail. Thanks for your help tiny ad.
Rocket Mass Heater Manual - now free for a while
https://permies.com/goodies/8/rmhman
reply
    Bookmark Topic Watch Topic
  • New Topic