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Sawdust cement

 
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Sawdust cement is a thing, though not used in the states. The merits of the material arent really in question here, I'm more so interested in experience with the material and advanced block laying techniques.

I am building a structure, call it a shed, roughly 600sqft.

If I were to make a hollow block mold, and used sawdust cement:

-Do you think any problems would arise from filing the cavities at the end? My main concern being about drying properly.

-Would advanced techniques still apply? Would it be feasible still to not fill each cavity?

I want to go about the mold and hollow block route for material cost, weight and efficiency. I know I can make solid blocks just a easy and avoid this whole question, but I figured it'd be wise to fully work out the possibilities.

Also, I would love to hear about peoples experiences with sawdust cement, in particular Timbercrete. This material isn't in the states and though I've found a great wealth of information on installation, I have nothing to go of off but the directions and I'd really appreciate a more hands on perspective.
 
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Jesse, here are some threads that might interest you:

https://permies.com/t/128390/Wood-frame-sawdust-concrete-wofati

https://permies.com/t/147563/building-type-suit-environment-weather#1152871

https://permies.com/t/52699/Natural-insulation-walk-cooler

I hope you will find what you are looking for.

 
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Jesse, where are you building.
Its it hot and humid drying will be an issue.

My main concern being about drying properly.



But there are steps you can take to help.
- Stack them undercover
- let them dry slowly so cracking is not an issue
- consider shading then at the hottest part of the day
- place them with space between, 3 inches min.
- if stacking put a timber slat in place to separate them
- wind will help dry them
 
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