Thursday, August 5, 2010

[papercreters] Shrinkage?

First off I would like to say 'You guys/gals are awesome!!'. I love like minded people. Everyone I talk to about papercrete looks at me like I have two heads.

My first papercrete project will be a shed in the backyard. Something that looks like a small cottage with a 3' front porch, front door with windows on either side.

I was thinking 12' X 10' with 8' walls, 8' double doors in the side. Foundation of cement block 12" below and 12 above grade. Framing would consist of rough cut lumber, 4x4 posts for the corners plus frame work for the doors and windows, topped with 2x4.

I am now thinking that shrinkage is going to be a problem and the framework will have to go and make the walls 10" wide and load bearing.

The roof is also bugging me because I want it made of papercrete as well but I need some suggestions on how to make that work.

My paper material will be box cardboard, recipe will be barrel filled with pre-soaked cardboard, 1/2 bag of cement, filler ? (don' know yet) probably sand.

My mixer is going to be a 45 gallon plastic barrel with a 3" waste outlet that they use in campers, the mixer is going to be a 1/4 hp electric motor with a pulley connected via a belt to a 3 1/2' metal shaft with mixing blades on it.

In a 10" thick wall what is the width shrinkage? Does it shrink in the length?

Thanks
Dan

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