<div dir="ltr"><br><div>Best cheap cement mold release I've found?</div><div><br></div><div>Off-brand, non-stick cooking spray.   It's strongly hydrophobic, and it has an additive that gives it a good "stick" to any surface.   </div>

<div><br></div><div>The cheaper, the better.  I've found that "PAM" is actually not as good as .. say .. "Safeway generic brand."</div><div><br></div><div>-M</div></div><div class="gmail_extra"><br>

<br><div class="gmail_quote">On Wed, Sep 4, 2013 at 11:53 AM, girlgeek <span dir="ltr"><<a href="mailto:girlgeek@wt.net" target="_blank">girlgeek@wt.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


  
    
  
  <div text="#000000" bgcolor="#FFFFFF">
    <div>Hi Frantisek, <br>
      One good way to make the top is to build a mold of formica with
      the smooth side facing in so that you will have a nice smooth
      surface to pour  the top into.  You are working upside down here. 
      If you want any includes at the surface then they go in first. 
      It's an upside down cake.  A nice smooth mold surface will save
      you a LOT of sanding & coughing.<br>
      <br>
      The tensil strength of concrete is not particularly good.  You
      will need some metal or wood below the surface level.  I don't
      know what they are called, but there are meshes of rebar type
      metal that you can use for the strength layer.  <br>
      <br>
      At the end it is a matter of attaching the table top to the legs. 
      You probably want to imbed some attaching mechanism into the top
      and/ or legs while you are pouring. I recommend thinking this step
      through completely before you start.  <br>
      <br>
      You may wish to use the same sort of formica boxes for the leg
      mold.  <br>
      <br>
      Don't forget a release material.  I don't know what kind of
      release agent is needed for cement.  <br>
      <br>
      hth,  all the best to you there in Korea, <br>
      Claudia <br><div><div class="h5">
      <br>
      <br>
      On 9/4/2013 6:20 PM, Rikke Rasmussen wrote:<br>
    </div></div></div>
    <blockquote type="cite"><div><div class="h5">
      
      <div dir="ltr">+1
        <div><br>
        </div>
        <div>It looks amazing! Rockin' job, Jarrod!<br>
        </div>
      </div>
      <div class="gmail_extra"><br>
        <br>
        <div class="gmail_quote">On Wed, Sep 4, 2013 at 11:20 AM, jarrod
          hicks <span dir="ltr"><<a href="mailto:hicksu@gmail.com" target="_blank">hicksu@gmail.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote">
            <div dir="ltr">I started by watching several youtube videos
              explaining the process of creating concrete counter tops
              in various ways. 
              <div>
                <br>
              </div>
              <div>I ended up choosing quikrete 5000 for concrete. This
                comes in 60 or 80 pound bags with cement, sand, and a
                small rock aggregate already mixed together. Only water
                has to be added. We used a pretty dry mix that was hard
                to work with, but should turn out strong. The concrete
                layer is at least 2" thick, some of the videos I saw
                said one could get away with 1.5" thick.</div>
              <div><br>
              </div>
              <div>We used a welded wire concrete reinforcing mesh
                inside the counter-top about 1/2" from the bottom of
                concrete. Most instructions recommended using
                reinforcement to control cracking. Although I couldn't
                find it nearby, another recommended reinforcement
                material was masonry block ladder wire.</div>
              <div><br>
              </div>
              <div>The forms were attached to the table, protected with
                polyurethane, and we poured directly onto it. The other
                popular way of making these counter tops is to pour into
                a form that is separate from the counter so that the
                nice flat bottom of the form becomes the nice flat top
                of the counter.</div>
              <div><br>
              </div>
              <div>After removing the forms, I patched any large voids
                with pour stone. If we used a slightly wetter concrete
                mix and more vibration we probably could have greatly
                reduced these. </div>
              <div><br>
              </div>
              <div>
                The top was finished using hand trowels during the pour
                and a masonry grinding wheel with our grinder/polisher
                after 7 days of curing. Then covered with a generous
                coat of penetrating concrete sealer.</div>
              <div><br>
              </div>
              <div>Cheers</div>
              <div class="gmail_extra"><br>
                <div class="gmail_quote">On Wed, Sep 4, 2013 at 3:46 AM,
                  Frantisek Apfelbeck <span dir="ltr"><<a href="mailto:algoldor@yahoo.com" target="_blank">algoldor@yahoo.com</a>></span>
                  wrote:<br>
                  <blockquote class="gmail_quote">
                    <div>
                      <div>
                        <div>Hi Jarrod,</div>
                        <div>Thanks a lot for the info! I'm actually
                          going to build table with concrete top in next
                          few days and it is my first time. I wonder
                          could you recommend me how shall I approach
                          the top concrete layer? Is it just cement
                          mixed with water no sand no iron for
                          strengthening? How thick do you think I should
                          go? There is no stove in it, the propose of
                          the table is to serve as a preparation place
                          handling however hot stuff (it is suppose to
                          handle the thinks coming out of the oven).
                          Also I wonder what is the concrete finish
                          which you are mentioning in the how to?</div>
                        <div><br>
                        </div>
                        <div>The table is going to be used in a small
                          hostel here in Jeju (island South of South
                          Korea - part of the country) next to the
                          concrete oven which I helped to build. I'm one
                          of the cofounders of Tastebridge so it is
                          really nice to see any project like this to
                          help to keep the food hacking in the game in
                          the place!</div>
                        <div><br>
                        </div>
                        <div>
                          Many thanks for any info and your time and
                          effort with the project!</div>
                        <div>
                          <br>
                        </div>
                        <div>Sincerely, </div>
                        <div>
                          <div>
                             </div>
                          <div>Frantisek Algoldor Apfelbeck</div>
                          <div><br>
                            <br>
                          </div>
                          <div>biotechnologist&kvasir and hacker</div>
                          <br>
                          <div><br>
                          </div>
                          <div><a href="http://www.frantisekapfelbeck.org" target="_blank">http://www.frantisekapfelbeck.org</a></div>
                          <div><br>
                            <br>
                          </div>
                          <div>"There is no way to peace, peace is the
                            way." Mohandas Karamchand Gandhi<br>
                          </div>
                          <br>
                        </div>
                        <div>
                          <div>
                            <div dir="ltr">
                              <hr> <b><span>From:</span></b> jarrod
                              hicks <<a href="mailto:hicksu@gmail.com" target="_blank">hicksu@gmail.com</a>><br>
                              <b><span>To:</span></b> NoiseBridge
                              Discuss <<a href="mailto:noisebridge-discuss@lists.noisebridge.net" target="_blank">noisebridge-discuss@lists.noisebridge.net</a>>
                              <br>
                              <b><span>Sent:</span></b> Wednesday,
                              September 4, 2013 10:10 AM<br>
                              <b><span>Subject:</span></b>
                              [Noisebridge-discuss] Made at Noisebridge
                              - Concrete Stove<br>
                            </div>
                            <div>
                              <div>
                                <div>
                                  <div>
                                    <div><br>
                                      <div>
                                        <div dir="ltr">
                                          <div>Here is some photo
                                            documentation of the new
                                            stove that I installed
                                            yesterday. Big thanks to all
                                            that helped, and those that
                                            resisted writing their names
                                            in the concrete while it
                                            cured.</div>
                                          <div><br>
                                          </div>
                                          <a rel="nofollow" href="https://noisebridge.net/wiki/Concrete_Stove" target="_blank">https://<span>noisebridge</span>.net/wiki/Concrete_Stove</a><br>
                                          <div><br>
                                          </div>
                                          <div>Cheers.</div>
                                          <div><br>
                                          </div>
                                          <div>(If anyone feels the urge
                                            to send some cash my way to
                                            help offset the materials
                                            cost, that would be sweet
                                            and it would likely end up
                                            spent on the next <span>Noisebridge</span>
                                            improvement anyway. No
                                            worries though, it was a fun
                                            project.)</div>
                                        </div>
                                      </div>
                                      <br>
                                    </div>
                                  </div>
                                </div>
                              </div>
                              <div>
                                <div>_______________________________________________<br>
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                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </div>
                    </div>
                  </blockquote>
                </div>
                <br>
              </div>
            </div>
            <br>
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            <br>
          </blockquote>
        </div>
        <br>
      </div>
      <br>
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      <br>
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      <fieldset></fieldset>
      <br>
      
      </div></div><p>No virus found in this message.<br>
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