web analytics
Mortar choice issue - need help to decide - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse

Photo Galleries are back! Instructions below.

Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

Forum users will be able to access their “PhotoPlog” images through their user profile page by clicking on the “Media” tab.
They will also be able to browse other albums by going to the albums page. (On the forum site, there is a link in the black bar beside “Forums” to the albums.)

In order for users to create an album please follow the steps below.
1) Go to user profile page and click “Media”
2) Click Add Photos
3) Enter Photo Gallery Title in the first field
4) Click Upload or Select from Photo Album to add photos
5) Click Post
6) Once posted, the album will be created as a “Topic” on the albums page for the public to see. The topic title will be the “Photo Gallery Title” they created before uploading their photos.


To create this migration path we used vBulletin5’s default album structure. Unfortunately, it won’t work like the “PhotoPlog” but is an album/gallery component on the forum now.
See more
See less

Mortar choice issue - need help to decide

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Mortar choice issue - need help to decide

    Hi!
    There are several options available on the reasonable price - common fireclays, professional refractory mortar (28% - Al2O3) and ready-to-use waterglass-based mortars.
    It seems now that I'll use Hendo’s Dome Gauge (http://www.fornobravo.com/forum/f28/...idea-2573.html)
    and will cut bricks on two sides, so, "horizontal" seams on the outer side will be relatively thick and the "vertical" seams should be really thin.

    I've heard that waterglass is suitable for thin seams only and (sound strange for me) that is not good from the health point of view.
    What to choose - water based refractory mortar or waterglass-based mortar?

    Thanks in advance,
    Dimitry.

    PS. Have no masonry skills at all, but seems to be well educable (and self educable).

  • #2
    Re: Mortar choice issue - need help to decide

    "Waterglass" is a new word to me in the mortar department. Do you have a link?
    My geodesic oven project: part 1, part 2

    Comment


    • #3
      Re: Mortar choice issue - need help to decide

      It's a new word for me as well, I'm not sure that its a best way to translate the Russian term, but what I've got from the on-line dictionary:

      liquid glass
      soluble silicate; water glass; liquid silica glass
      liquid silica
      alkali silicate; soluble potassium; water-glass
      soluble glass; soluble water glass; sodium silicate solution; sodium silicate

      OK, here it comes: Sodium silicate - Wikipedia, the free encyclopedia

      Comment


      • #4
        Re: Mortar choice issue - need help to decide

        I've tried to find, but failed - everything is in Russian. Generally speaking, that kind of mortars consists of chamotte, "hydrated" with sodium silicate, as I've understand it helps significantly reduce amount of water and as a result - reduce shrinking as it dries.

        Comment


        • #5
          Re: Mortar choice issue - need help to decide

          Dvonk,
          I think you're right, sodium silicate acts as a defocculant to make the materials more viscous. But you need to mix it well to make it work. Another term for it is thixotropic.
          Kindled with zeal and fired with passion.

          Comment


          • #6
            Re: Mortar choice issue - need help to decide

            On Russian fireplace and stove forums I've mentioned opinions that its not suitable for thick seams (only for 1-3 mm) - but all professional people here in Russia are so smart so they never agree with somebody else, so I'm in doubt
            Last edited by dvonk; 04-16-2008, 06:46 AM.

            Comment


            • #7
              Re: Mortar choice issue - need help to decide

              Hey, this sounds great:

              Refractory use

              Water glass is a useful binder of solids, such as vermiculite and perlite. When blended with the aforementioned lightweight aggregates, water glass can be used to make hard, high-temperature insulation boards used for refractories, passive fire protection and high temperature insulations, such as moulded pipe insulation applications. When mixed with finely divided mineral powders, such as vermiculite dust (which is common scrap from the exfoliation process), one can produce high temperature adhesives. The intumescence disappears in the presence of finely divided mineral dust, whereby the waterglass becomes a mere matrix. Waterglass is inexpensive and abundantly available, which makes its use popular in many refractory applications.
              and this:

              Concrete treated with a sodium silicate solution helps to significantly reduce porosity in most masonry products such as concrete, stucco, plasters. A chemical reaction occurs with the excess Ca(OH)2 in the concrete that permanently binds the silicates with the surface making them far more wearable and water repellent. It is generally advised to apply only after initial cure has taken place (7 days or so depending on conditions). These coatings are known as silicate mineral paint.
              What is the stuff? Where do we get ahold of it?

              On Russian fireplace and stove forums I've mentioned opinions that its not suitable for thick seams (only for 1-3 mm) - but all people here are so smart so they never agree with somebody else, so I'm in doubt
              Yes there is a danger of the "not invented here" mentality on this forum, but I think we're open to new ideas when they are good ones. The Russians have long experience with wood burning, and I for one am interested in tapping into that knowledge.

              As far as mortar thickness, the commercial refractory mortars are specified for thin joints, but people have used them for thick joint pompeii builds successfully.
              Last edited by dmun; 04-16-2008, 06:41 AM. Reason: missing link
              My geodesic oven project: part 1, part 2

              Comment


              • #8
                Re: Mortar choice issue - need help to decide

                "all people here" means - here, in Russia ))
                Every professional here has his own exceptional opinion, so never agree with each other. I have to edit me my comment - since here, on this forum, people looks like more consolidated.

                Comment

                Working...
                X