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suzannesmith 06-30-2012 08:17 PM

cement board to cement blocks
 
I am wondering what the best way to secure two cement blocks together would be. then I want to cover them with cement board.

joecaption 06-30-2012 08:26 PM

Ok, what is it your really trying to make here?
Want a good anserwer that will work we need to know.

suzannesmith 06-30-2012 10:30 PM

What am I making? Good question. You are dealing with a crazy artist here who works in stucco lately. I want to make a tower of cement blocks. The first one will be only two blocks high stacked end to end. I am thinking I can mortar them together and maybe add some acrylic adhesive to make it extra strong so I can move the tower around.
Then to make the open sides sealed up I was thinking of adhering some cement board to the cement blocks. I was thinking liquid nails but that doesnt seem strong enough. It doesnt have to be precise. I put stucco over everything and mirrors, tiles, rocks etc to create a natural looking pilar with a flat top to set an intricate sculpture on. Thank you for any suggestions.

oh'mike 06-30-2012 11:20 PM

Buy a bag of modified thinset--that is designed for sticking tile or stone to cement board--cheap $20 a bag or less--mix with water--use what you need and save the rest--water clean up--

It will work well---comes in a fast setting type also--

suzannesmith 06-30-2012 11:31 PM

Thank you! I got a flashlight and went out into my shed to be sure my bag of thinset says modified and it does. So I have almost a full bag. I wasnt sure if it was strong enough. Do you think I should pour some acrylic additive in it? Also How thick do you think I can lay it on. That will put the cement board on the sides and also keep the tower together. I wonder how high I can make the tower. The sky's the limit I guess. Oh boy.

oh'mike 06-30-2012 11:48 PM

If it's still fresh---just use water---mixing the latex into modified can cause problems as there is powdered latex in the modified already.

If the bag is old or has little balls of hardened powder--throw that away and get fresh--

Powders can go bad if the storage area is humid or damp---

Evstarr 07-01-2012 03:16 AM

If you are planning to haul them around, and you are stacking them on end, you might consider a mechanical fastening such as metal strapping in addition to the mortar or thinset.
The problem is that these products are designed to adhere to stationary or at least mostly stationary objects.

suzannesmith 07-01-2012 04:41 AM

Exactly Thank you. and that sounds like it would require drilling holes in the cement block. sigh.....
However if I mortar on some cement board to hid the holes in the cement block maybe that would give the needed support.
Then the stucco over the top of everything would be even more support.
Maybe I could embed some metal or plastic strips into the thinset without drilling holes

zircon 07-01-2012 08:13 AM

If I were using cement blocks, I would drill holes in the ends and bolt them together. Since you are covering with cement board, why not make a wood frame with 2x's and plywood and cover that with cement board? It would be much easier on your back than humping these heavy blocks.

suzannesmith 07-01-2012 10:53 AM

Good point. I guess it is because I can't build. Sawing and nailing etc just isn't something I want to do. sigh. I am only putting the cement board over the holes. First I am going to try it with just one block. But two blocks would be fun. heavy tho. I was imagining using a dolly to move them. I guess I like to experiment too and try new ways of doing things. I have the cement blocks hanging around just begging to be part of a sculpture. I like the way they are so heavy that they stay where I put them and I think I can transform them into something really interesting with all the textures of the stucco and pieces of cement board incorporated into the towers.

Thank you all for the great advice.

Evstarr 07-07-2012 06:19 PM

Post some pics of what you end up with!

ktkelly 07-07-2012 07:23 PM

Surface bonding cement might be an option...

suzannesmith 07-07-2012 07:50 PM

Im working on a tower right now. Pictures soon What is the difference between bonding cement and fortified thinset? The thinset seems to be working pretty well and I didn't put any acrylic bonding agent in there. It seems to me that my art work is about how cement bonds together. I am using foam to shape things too and that makes me uneasy. Stucco sticking to foam doesnt have that bonding thing. I have heard cement can still be drying fifty years from now. Amazing stuff and I do it to honor my dad who was a civil engineer.

suzannesmith 07-07-2012 09:17 PM

1 Attachment(s)
Here is my first small tower with just thinset, foam and cement board all together. There is another face and butterfly on the other side and I had to think hard about what I wanted to seal into the tower before I closed it up. I will add some more things and then stucco it and paint it with exterior paint. Ill try a two block high tower next.

suzannesmith 07-22-2012 12:29 AM

I can't figure out how I posted that photo above. lol. It wants the photo url and I don't know it. So here it the link to my Stucco Art website. I love my new stucco towers. Stucco by Zanelle | Wix.com http://C:%5CUsers%5Csuzanne%5CPictur...t%5C2012-07-21


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