Ok well i will have to do some more r@d on it but we have used some already and has been ok have used a sledge hammer on it and parked a 5 ton truck on it and dint do anything to it but dent it,i will take it to the lab here for a compression test some day just to see.Thx
Clair.
In papercreters@yahoogroups.com, "Amanda" <amandaalexis@...> wrote:
>
> No! Don't! Adding drywall BAD!
>
> My partner has been studying concrete chemistry and drywall
> creates a self expanding mess in portland cement. In fact
> it forms "ettringite" which is blast-less demolition material
> that expands with many PSI force to break apart rock and solid
> structures.
>
> She says if you instead add class C flyash to your portland
> cement (up to 60%) you will have a stronger concrete and use
> less water. Flyash can be gotten really cheap since it is a
> product of coal burning power generation plants. We priced it
> and in 50# bags it's only $2/bag from Fritz Industries. No
> idea how cheap in large shipments but a lot of the $2/bag
> was the inconvenience of bagging it.
>
>
>
> --- In papercreters@yahoogroups.com, "smt460" <smt460@> wrote:
> >
> > ....We have found a old grinder for grain at the acution
> so will modify it for drywall as we can use it in place of
> a % of cement.
>
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