Announcement

Collapse
No announcement yet.

30" Cast Scotland

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

  • #31
    Originally posted by david s View Post
    No, fit it that way, you’re good to go. Just make sure the pipe is not a really tight fit, so there’s a little room to allow it’s expansion within the casting.

    This is the way I do it, but there are plenty of other solutions no doubt.
    Click image for larger version

Name:	P3250338 copy.JPG
Views:	172
Size:	559.5 KB
ID:	427437
    Aye that's what worried me a little david s, I did pack cardboard around my 150mm flue mold at casting stage as thought it would leave it a little loose for the expansion, but my flue is actually quite a tight fit unfortunately, would you recommend trying to lightly sand the inside of the flue cast a little to try and make it less of a tight fit?

    ​​​​​​Cheers again

    Comment


    • #32
      If you can rotate the pipe within the casting reasonably easily then it'll be ok.
      Kindled with zeal and fired with passion.

      Comment


      • #33
        Ah gutted, even left my arch for a couple of days longer just in case. I think the problem is I used my decorative glass as my gravel for the mix, it's really smooth stuff so I don't think it binded. My mix was 1 cement:2sand:3gravel(decorative aggregate). Has anyone had anything like this, or should I have put rebar through it?
        Cheers again.

        ​​​​@david s, thanks for the flue advice there, it does rota Click image for larger version

Name:	IMG_20200822_092734-01.jpeg
Views:	109
Size:	511.5 KB
ID:	428611 te so all good to go, just gotta get this arch sorted first

        Comment


        • #34
          So sorry to see that mate - perhaps it was the aggregate like you said. At least you can make another one though.
          I used some reinforcement in mine and just put the decorative on the very front (set in) and used normal pea gravel in the mix.
          My cast oven build thread

          https://community.fornobravo.com/for...-castable-dome

          Comment


          • #35
            +1 on the reinforcement. I think that you really need it. I'm not sure if the aggregate was the problem. But, for a reverse concrete form you can make the bottom of the form the front. Placing already smooth surfaces toward the bottom will make polishing the face much easier. I broke and used the smooth side of some already broken colored glass panels that I got free from a glass company. I placed (glued) them in the form where wanted. With that you can use what ever type conrcete and aggregate you want for strength.




            Click image for larger version

Name:	counter2.JPG
Views:	80
Size:	375.4 KB
ID:	428649


            Click image for larger version

Name:	drawer3 001.JPG
Views:	99
Size:	637.9 KB
ID:	428648
            Joe Watson " A year from now, you will wish that you had started today" My Build Album / My Build

            Comment


            • #36
              Originally posted by Daveholdn View Post
              Ah gutted, even left my arch for a couple of days longer just in case. I think the problem is I used my decorative glass as my gravel for the mix, it's really smooth stuff so I don't think it binded. My mix was 1 cement:2sand:3gravel(decorative aggregate). Has anyone had anything like this, or should I have put rebar through it?
              Cheers again.

              ​​​​@david s, thanks for the flue advice there, it does rota Click image for larger version

Name:	IMG_20200822_092734-01.jpeg
Views:	109
Size:	511.5 KB
ID:	428611 te so all good to go, just gotta get this arch sorted first
              That’s a pity. 3:2:1 not all that strong, especially for a tin casting, add a bit more cement or some thin (5 mm) steel bar and some AR glass fibres.
              Also wrap the casting up for a week to damp cure.
              you only need the fancy aggregate in the surface you are polishing. Also the aggregate size should not exceed 1/3 of the casting thickness.

              Kindled with zeal and fired with passion.

              Comment


              • #37
                Originally posted by Gulf View Post
                +1 on the reinforcement. I think that you really need it. I'm not sure if the aggregate was the problem. But, for a reverse concrete form you can make the bottom of the form the front. Placing already smooth surfaces toward the bottom will make polishing the face much easier. I broke and used the smooth side of some already broken colored glass panels that I got free from a glass company. I placed (glued) them in the form where wanted. With that you can use what ever type conrcete and aggregate you want for strength.




                Click image for larger version

Name:	counter2.JPG
Views:	80
Size:	375.4 KB
ID:	428649


                Click image for larger version

Name:	drawer3 001.JPG
Views:	99
Size:	637.9 KB
ID:	428648
                I'm curious how you created the coloured marbling effect in the concrete. It looks really effective.

                Comment


                • #38
                  I'm curious how you created the coloured marbling effect in the concrete. It looks really effective.
                  Thank you very much. Note that the form is upside down. I mixed 3 colors of concrete pressing them in to the form randomly. I placed a small ridge of loose black sand into all borders before adding the next color. (The trial run in the first pic is looks a little thick) I just wanted to create a very slight void between the colors at the very surface. The last pic is after the piece has been removed from the form and cleaned. Most of the loose black sand has been removed from the borders creating thin tapered voids. These voids along with all the other purpose made and natural occurring voids are later filled with a charcoal colored slurry before polishing.

                  I hope that I am not hijacking the thread but, the middle pic does show ladder wire reinforcement....... and my beautiful helper..... She is almost as tall as me nowadays


                  Click image for larger version

Name:	counters2 002.JPG
Views:	87
Size:	519.9 KB
ID:	428699 Click image for larger version

Name:	countre4.JPG
Views:	64
Size:	486.0 KB
ID:	428700 Click image for larger version

Name:	Jenna 025.JPG
Views:	62
Size:	584.7 KB
ID:	428701
                  Joe Watson " A year from now, you will wish that you had started today" My Build Album / My Build

                  Comment

                  Working...
                  X