The problem I'm having is how do you come up with the recipe? The litebuilt people create these blocks in two types. One is a density of 600 kg/m3, generally used for insulating purposes or interior walls that aren't load bearing. Then the other is a density of 1100 kg/m3, used for outer walls and load bearing walls.
When looking into the recipe described by DomeGaia I finally found that the process of 94# of cement + 7 gallons of water + 36 gallons of foam equates to a foam that is about 300 kg/m3?
Is that right? 19 lbs/cubic foot? That's not hardly worth much in terms of strength. Are my hopes and dreams destroyed? Or am I wrong about the density? Or can you increase the density? I notice they do as much as a 3:1 sand ratio, or at the minimum a 2:1 sand ratio to achieve the 1100 kg/cubic meter or 69 lbs/cubic foot density rating. Not sure how that measures out with the foam also.
I'd very much like to work with this foam concrete to see its potential but I'm leery to try it as any kind of building material like I hoped for now that I can see it's expected density. Any help or better understanding of the possibilities would be much appreciated.
]]>The problem I'm having is how do you come up with the recipe? The litebuilt people create these blocks in two types. One is a density of 600 kg/m3, generally used for insulating purposes or interior walls that aren't load bearing. Then the other is a density of 1100 kg/m3, used for outer walls and load bearing walls.
When looking into the recipe described by DomeGaia I finally found that the process of 94# of cement + 7 gallons of water + 36 gallons of foam equates to a foam that is about 300 kg/m3?
Is that right? 19 lbs/cubic foot? That's not hardly worth much in terms of strength. Are my hopes and dreams destroyed? Or am I wrong about the density? Or can you increase the density? I notice they do as much as a 3:1 sand ratio, or at the minimum a 2:1 sand ratio to achieve the 1100 kg/cubic meter or 69 lbs/cubic foot density rating. Not sure how that measures out with the foam also.
I'd very much like to work with this foam concrete to see its potential but I'm leery to try it as any kind of building material like I hoped for now that I can see it's expected density. Any help or better understanding of the possibilities would be much appreciated.
]]>https://www.richway.com/construction-resources/mix-designs-and-economics.html#strength
]]>I have a couple more questions:
How do you test the density? I'd like to better understand how to test it so that if I mix and work on a few recipes for my use I can test for the actual density I'm achieving, but I'm not finding a lot on how to test.
Are there any recipes to work from beside the favorite recipes already shared on this site which achieves high insulating but very low strength? I'll try to work on this calculator a bit more to understand it better, but would love to see some smaller volume recipes shared as well.
As for recipes the only one I know of is in the calculator I posted before. Otherwise I would say do your own testing of different cement to sand ratios to see what works best for your building blocks.
Here are some videos I made I hope this helps you.
This is a pretty handy calculator to build some basic recipes off of, but naturally need to pour and test for exact numbers. This has been very helpful.
The number I get bases a 5 gallon bucket at a size of about .78 or .8 cubic feet, so if you want that to weight 3 pounds for your foam, you generally try to get 3.75 - 4 pounds per cubic foot for your foam density? Is that about correct? Or is my math off? Just trying to get a bit specific as I plan to build with this and exact formulas are important for repetition.
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