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<br>
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? <br>
<br>
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): <br>
<br>
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. <br>
<br>
-G.<br>
<br>
<br>
=====<br>
<br>
<br>
<div class="moz-cite-prefix">On 13-03-05-Tue 2:45 PM, Vicky Knox
wrote:<br>
</div>
<blockquote
cite="mid:CAPwEF4rZ_sTF0QEsF1zzCdXFvvjBYbBBJahLyGworq6TTBR7HA@mail.gmail.com"
type="cite">Hey all! <br>
<br>
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. <br>
<br>
V<br>
<br>
From: Robert Tomkiewicz <<a moz-do-not-send="true"
href="mailto:tomkiewicz.b@gmail.com" target="_blank">tomkiewicz.b@gmail.com</a>><br>
Subject: Skymall Workshop / Skillshare: Basic Concrete Slab *Sat
March 16*, 10am onward<br>
<br>
Hi all,<br>
<br>
I am in the process of modernizing the laundry facilites at the
old<br>
homestead and the first step is pouring a little slab outdoors to
hold the<br>
washer and dryer off the ground and function as a foundation for
the shed<br>
which will hold them.<br>
<br>
Together, we'll (re)discover the basics of pouring a concrete
slab. We'll<br>
be mixing by hand in wheelbarrows, which is just fine for a slab
of this<br>
scale, unless I get a line on a mixer before the end of the week.<br>
<br>
I will have the forms built and (probably) the rebar laid before
Saturday,<br>
but they'll be there for you to take a look at so you can see how
they're<br>
constructed before we begin.<br>
<br>
Beer and snackage provided. Space is limited to the amount of
people that<br>
will actually be useful, which in fact is quite a few. Still, if
you could<br>
RSVP with any specific dietary preferences that would be super
sweet. If<br>
we're super fast we might even get to do some plumbing. Got to
get that<br>
natural gas hookup to the dryer, and hot water pipe in place for
the<br>
washing machine.<br>
<br>
Bobby
<br>
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