[Strawbale] Tashcrete again
Stone Tool
owly at ttc-cmc.net
Sun May 6 12:00:00 CDT 2007
The subject of "trashcrete" seems to have died in the furor of people's
outrage over the use of Portland Cement as a binder. It seems that
clay slip bonded straw is "cool" here but as soon as "crete" is brought
up it is untouchable.
It is unfortunate that there have been no intelligent and thoughtful
responses to this thread...... apparently for this reason.
The reason for the "crete" rather than the clay slip other than my
personal objection to the idea of building with "mud" is the ability of
it to set up / dry in far greater thickness than would be the case with
mud at a reasonable rate. Crete has the benefit of setting up more or
less independently of "dehydration" and is an extremely valuable product
for that reason. This is not the case with clay, or lime obviously.
Looking at available cheap agents to bond, cement is about the only one.
The idea of building door and window openings, and spilling and
tamping a material such as this around it constrained by forms is very
appealing....... to me at least. The concept is for a very "dry" mix
beginning with cement mixed with water, relatively thin, and straw,
waste paper, pieces of packing material, etc (trash) until the mix is
fairly dry..... the cement is primarily a bonding agent as with clay
slip. Imagine putting up a receptacle for waste Styrofoam.... egg
cartons, packing, "peanuts", etc..... at the local supermarket or
somewhere, shredding it along with paper, straw, etc to create a light
weight matrix (non-load bearing). Waste materials are
"environmentally friendly"..... at least if you don't regard crete in
the same warm and fuzzy light. Mud is NOT an option for me......
perhaps urea formaldehyde adhesive of some sort......
This could be a very interesting experiment with a small mixer...... to
see what sort of product could result. Let's not be hidebound, but
think outside the box a bit......... I don't think that it is a sin to
discuss variants here.
H.W.
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