[papercreters] Re: Best way to pour a 6" x 12" x 52" block?

>>I found it to be easier to build walls in place and in one piece<<

I thought of that, and several others in different threads have promoted the slip forming method as well.

Neither will work for me in this instance as I'm constructing a prototype heating unit and the dimensions may change before all is said an done. So the stackable 6" x 12" x 52" block is ideal for this project. When it's finalized, I may mortar a lot of the blocks to make wall panels.

Thanks!

Dan

--- In papercreters@yahoogroups.com, Tasha <tashatesla@...> wrote:
>
> Dan,
> You could _minimize the trimming_ if you make the mold larger at the top - visualize an inverted trapezoid (larger side on top).
> Do an experiment with the local material to see what the shrinkage is, and adjust the mold accordingly to get the shape you want.
> You may not have too trim much at all.
> As a separate topic, I found it to be easier to build walls in place and in one piece. Use sub-flooring (1.5 in thick) for the sides and it
> looks pretty good when dry. A surprise is that it isn't too heavy (no sand!), but then I only built 4 feet of wall at a time (15 inches thick).
> I clamped the top only, which made taking the form off pretty easy too - the wood has enough rigidity to hold its shape even when form is full.
> Glad you're having fun - ummm ... right, that's what it is ... ... yes indeed ... lol
> TASHA
>
> On 6/28/2012 07:37A, trendawareness wrote:
> >>> have found that if I make the molds bigger at the top, then the dried product is much more rectangular.<<
> > Tasha,
> >
> > Sorry I missed this post in my last reply. I kept my molds "square" thinking that backfills should help retain the shape.
> >
> > However, next time I build a mold, I'll definitely build it a bit larger than what I need and then trim the block when an exact dimension is required.
> >
> > Thanks
> >
> > Dan
> >
> >
> > --- In papercreters@yahoogroups.com, Tasha<tashatesla@> wrote:
> >> I have found that if I make the molds bigger at the top, then the dried product is much more rectangular.
> >> How much? Depends on your shrinkage - have to experiment with a couple, but worth the time.
> >> TASHA
> >>
> >> On 6/27/2012 08:12A, Daniel Ford wrote:
> >>> Dear Papercrete Group:
> >>>
> >>> I'm working on a project that requires a consistent 6" h x 12" w x 52" l block. I've assembled the molds and have filled the first one to the top and will backfill the shrinkage in a day or two. (see attached photos)
> >>>
> >>> My question is whether or not this is the best way to pour a 6" block or should I fill it half way on the first pour? I need to make 50 of these and the sooner the blocks dry the sooner I can complete the project.
> >>>
> >>> For background, my mix is 1# paper, 1# portland, 1# sand, .05 # Borax. I live near Cincinnati OH and our summers are hot and humid.
> >>>
> >>> Thanks
> >>>
> >>> Dan
> >>>
> >>>
> >>>
> >>> ------------------------------------
> >>>
> >>> Yahoo! Groups Links
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>



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