Portland Cement? Which one?
glocat
18 years ago
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billie_ann
18 years agoRelated Discussions
Has anyone tried Bond Cement instead or Regular Portland
Comments (5)When you try to create a hypertufa mix with bonding cement, you make a very weak product because Bonding Cement already is a prepared mix of portland, sand, fibers, and an admix. It is already probably 1/3 or 1/4 portland, and if you mix it as 1/3 of the tufa mix, you only have about 1/6 portland or 1/8 portland, making it very weak. This product, used alone, could be used as a top layer to smooth out a surface. It will stick to other concrete very well. I once put it in a concrete cistern to fix all the pocked holes and cracks. I put only about an inch layer all over to smooth the surface of the existing concrete, and after it cured I filled it with water and the kids used it as a swimming pool for a couple of years. (the cistern was 9 feet deep into the ground and 9 feet by 9 feet square!) It held up very well!! You could even use it to texture a concrete or even a hypertufa pot, as it will adhere very well. Why not experiment with using it as an added texture to something you have already made? Like adding hair to a 'tufa head??? Have fun....See MoreStoring Portland Cement
Comments (7)I set my bags of cement inside of large heavy-duty trash bags (33-gallon, Home Depot)before I open them, then put the whole thing into a big plastic container that seals pretty well. It is easy to twist the top of the trash bag closed and it stays about as air tight as you can get it. If you use additional lime in your mix, it has to be stored in a similar fashion as moisture clumps it to the point that it will never mix in properly. Also, check with commercial bakeries. They use a variety of pails & tubs that actually have food-grade hermetic seals. The ones here are happy to be rid of them, othewise they have to pay for disposal. A guy here in town (Daryl's Barrels)actually makes his living collecting free, used industrial containers of all sorts and selling them by the road. Having bought several and seen his business, I'm guessing he does quite well by it and helps the environment at the same time. Cool. Any other neat or free sources...???...See More2 Portland garden shows, same days - which one?
Comments (13)Well, A girl has to know what I missed!!! What was it like??? From the posts, everyone seems like they looked, but didn't see anything that they couldn't live without.... Around the coast here in Bandon, I am begining to see lots of rocks (hardscape) showing up in front yards as a means (I guess) to easy up keep. But, boy, to me it's, hum... I should say... Please "Plant" some trees at lease... or you paid "what" for that!!! Silly me, I would like to hear what you all saw... Faith...See Morepyramid cement Blue Ridge Granite...any one have it
Comments (9)I posed the following questions on another forum: 1. Could the iron be locked up in the silica to the point that it won't oxidize? 2. Is it a matter of time before the iron oxidizes, expands and destroys the finish? 3. Is it a matter of what % levels of iron is in the aggregate? 4. Is it correct to assume that iron oxides used to dye the mix would not respond to the magnet? This was the first response to the query: "The iron in granite is iron oxide (in both ferric and ferrous forms), not raw iron. It is weakly magnetic, though not as strong as with iron. Iron oxide is what is used in "magnetic ink" for the automatically read account numbers at the bottom of checks. I suppose it is possible for the chlorine in the pool to oxidize the ferrous oxide to ferric oxide which would change the color from black to red-rust color, but the quantities are so small that it probably wouldn't be noticeable and would just be at the surface of the finish anyway. The real question is not whether the granite material gets oxidized, but rather whether it physically falls apart into particles. That is, it's not about dissolving (as ions) into the pool, but more about structural integrity. I can't answer that question; perhaps others with experience can." The second response: "The iron mineral you were picking up with a magnet is...magnetite (Fe3O4). Of the three iron atoms in magnetite, two are already in the ferric (3+) state. Magnetite is a fairly competent/durable mineral, though it can and will slowly oxidize to hematite (Fe203, otherwise known as rust). A true granite typically will have very little iron in it (generally While I can't remember all the eH/pH and other chemistry diagrams we could use to figure this out for certain, I would be very hesitant to put anything in my pool that was attracted to a magnet." Those responses left me bewildered about the situation and it would be helpful to have a better understanding of what the magnet picked up and the longrange impact it might have on the finish. Maybe you can offer an explanation? As stated previously we have not experienced any problems with the finish to date and don't want any in the future....See Moreglocat
18 years agotango88
18 years agoglocat
18 years agoCarpenterSF
12 years ago
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