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Making a Hypertufa Millstone Fountain

Posted by splais 10 ( on
Sun, Oct 28, 12 at 21:50

I just completed my first hypertufa project and it was a big one. A 32x6 inch millstone I'm turning into a fountain. It was both harder and easier than I expected. I wanted a larger piece than the concrete one I just finished. It was 32x3.5 inches and weighs about 250 pounds best I can figure. The hypertufa millstone is still curing, but I estimate it will probably weigh about 250 pounds also.

I made the mold out of a piece of plywood for a base and used a 25' piece of 6" flashing for the circular mold. The center hole was a piece of PVC pipe wrapped with wax paper.

The formula I used was 2 ninety pound bags of Portland cement (2cf), 2cf of medium vermiculite, and 2cf of strained peat moss. For reinforcement I mixed in a good bit of polyester fibers, for color I added dry brown tint, and for additional strength I added a gallon of acrylic fortifier to the water.

I rented a small cement mixer and thoroughly mixed all dry ingredient before adding the water. The hard part was getting it mixed right. When I started adding the water it really started to ball up but I had read someplace that just means you needed to add more water. We played around with it for quit a bit before I decided we had to start putting it in the mold even though it really wasn't runny at all. ( Note: after the fact it was clear I just needed to add a bit more water and it would have been a lot easier. ) We dumped the mix in the mold and I pounded it tight with an old brick and then used a cement trowel to smooth the surface. Let it sit for about 15 minutes and then put some grooves in the top for realism. On the second day I pulled out the PVC pipe in the center. On the third day I took the mold off and it was perfect as you can see in the pic. I kept it covered for three days After four days it already felt hard as a rock. I waited a week and then mounted the fountain on it's base. She came out really nice. I'm playing around with the idea to stain it a little darker, don't know yet.

Follow-Up Postings:

RE: Making a Hypertufa Millstone Fountain

Forgot to post it, here is a link to pics of how I did it.

RE: Making a Hypertufa Millstone Fountain

I love your yard and fountain!

RE: Making a Hypertufa Millstone Fountain

Thanks. It turned out better than I expected and will last a lot longer than I will :)

RE: Making a Hypertufa Millstone Fountain

I cant imagine doing all that work, but it sure looks stunning.

RE: Making a Hypertufa Millstone Fountain

It looks great.

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RE: Making a Hypertufa Millstone Fountain

This is great! I'm wanting to make one of these as well and wondered if you considered making it hollow. In other words, I'm wondering if I could make it like a very large pot. So the top would be the part against the plywood and then you would place something in the middle to fill the empty space like you would if you were making a pot, still keeping the PVC pipe in there of course. I'm not sure yet what I'd use for the middle part, but I'm sure I can come up with something.

The main reason I'm thinking of making it hollow is simply to make it easier for transporting. Any thoughts on that idea?

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