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Tips and Ideas for lime/concrete/sand/cob floor around a rocket stove  RSS feed

Adam Jonathan
Posts: 50
Location: Shenandoah Valley
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Hello Everyone, I picked up a 100 pound hearth stone yesterday, and would like to embed it in some kind of lime/concrete/cob flooring.

My goals for the flooring also include lighter weight, and fire resistance, as well as insulative value from the basement under the sub-floor.

My ingredients include:

White quickwall concrete
hydrated lime
filtered builder's sand

Any ideas on an ideal mix?

I'd like to include perlite for insulative value and lower weight.

I'd like to include straw for strength and to lower weight.

I'd like the floor to be white to match the Tudor theme we're going to use on our walls (clay/sand/straw cob with whitewash).

Jay C. White Cloud
Posts: 2413
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Hi Adam,

Well first I would lose the cement...its not applicable to the natural modalities, nor does it play well with the more natural ingredients.

To give good advice on a "bedding mix" I need to see the location and the stone to understand better the goals. I also need to know what type of hydrated lime it is. I am assuming it is "washed" builder's sand as I am not clear on what "filtered" builder's sand is...unless this is actually "filter sand" which is not meant for mortar and I would have to have more info. Most bedding mixes are 'fat' or 'rich' 1 part lime (lime/cobb) and 2 parts sand to 3 parts sand. Fiber additives are dependant on application

That is the best I can do with this amount of info...and lack of pictures.

allen lumley
Posts: 4154
Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
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Adam Jonathan : Perhaps future Newby Fellow Members may fall into error from the mention in your title of Cement and a rocket mass heater RMH, I Am Sure
That at some time in the past we have mentioned that All forms of Portland Based Cement Will fail if in close proximity to the Firebrick of the RMHs Combustion
Zone like for instance as a poor substitute for mortar to hold those bricks together or a poor binder for the insulating materials surrounding the Firebrick !

This mistake, and attempting to use iron / steel in place of firebrick or a refectory cast combustion Chamber is a mistake that must be watched for and stopped !

I am not trying to Highjack your post just protect your future fellow members ! Thanks Big AL
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