[sudo-discuss] Skymall Workshop / Skillshare: Basic Concrete Slab *Sat March 16*, 10am onward

[Vicky Knox]

This is being held in Oakland, in the
Mosswood<http://oaklandwiki.org/Mosswood>neighborhood. You can email
him for more details.

2013/3/5 Anon195714 <anon195714 at sbcglobal.net>

>
>
> Funnily enough, I have a mixer (and so did one of the guys behind PGP, as
> he proudly showed us one afternoon at a hacker gathering many years ago).
> And I have concrete skillz.  Whether I have enough time to help out is
> another question, but we'll see...  What city is this in, and approx. what
> dimensions are the slab?
>
> A few things to keep in mind about flatwork (slabs) (I'm sure Bobby
> already knows all this stuff, I'm just putting it out there for general
> knowledge):
>
> Ideal case is to put plastic sheeting below the entire slab, else the
> water in the concrete will be absorbed into the ground prematurely and
> weaken the concrete.  If this can't be done, spread about an inch of sand
> on the ground, and then wet down the sand just before pouring the
> concrete.  Rebar should be held off the ground by being placed on small
> standoffs (commonly available at lumber yards: 2" concrete cubes with wires
> sticking out from the top), otherwise the rebar will rust from the ground
> inward.  Concrete should be mixed as stiff as possible: excess water
> weakens it severely (the way ready mix companies get that "lentil soup"
> consistency is with chemicals known as "superplasticizers" not with
> water).  After finishing the surface, it should be covered with plastic
> tarp or sprayed with curing compound, otherwise sprinkled consistently
> after the surface is hard, for at least a few days and ideally for about 2
> weeks: this to prevent evaporation of the mix water.  Concrete should
> always "cure", never "dry" to harden.
>
> -G.
>
>
> =====
>
>
>
> On 13-03-05-Tue 2:45 PM, Vicky Knox wrote:
>
> Hey all!
>
> My friend Bobby will be putting on the below workshop. He is an amazing
> builder and metalworker who I've been sneakily trying to suck into the
> vortex that is Sudo Room. If anyone is interested in going to this workshop
> that he is putting on, will you envangelize him please? This event is sure
> to be fun--he has a fascinating mind and brews awesome beer. If you're into
> beer, make sure to ask him to show you the huge vats he welded, as well as
> the taps he has set up.
>
> V
>
> From: Robert Tomkiewicz <tomkiewicz.b at gmail.com>
> Subject: Skymall Workshop / Skillshare: Basic Concrete Slab *Sat March
> 16*, 10am onward
>
> Hi all,
>
> I am in the process of modernizing the laundry facilites at the old
> homestead and the first step is pouring a little slab outdoors to hold the
> washer and dryer off the ground and function as a foundation for the shed
> which will hold them.
>
> Together, we'll (re)discover the basics of pouring a concrete slab.  We'll
> be mixing by hand in wheelbarrows, which is just fine for a slab of this
> scale, unless I get a line on a mixer before the end of the week.
>
> I will have the forms built and (probably) the rebar laid before Saturday,
> but they'll be there for you to take a look at so you can see how they're
> constructed before we begin.
>
> Beer and snackage provided.  Space is limited to the amount of people that
> will actually be useful, which in fact is quite a few.  Still, if you could
> RSVP with any specific dietary preferences that would be super sweet.  If
> we're super fast we might even get to do some plumbing.  Got to get that
> natural gas hookup to the dryer, and hot water pipe in place for the
> washing machine.
>
> Bobby
>
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