I have considered making my own spherical molds to be easier to manage. I have wondered what would happen if I made them so that I could hook it to a vacuum pump and air compressor. My thought is if the mold was vibrated and had a vacuum applied at regular intervals while filling it, it would...
"What strength are you trying to obtain? I see a 7000 psi plus mix there. I'd reduce the cement, add some flyash, and increase the W/C to .4. "
The paper describing the mix had it listed at a touch over 10,000 psi, if 50% slag cement is used. I want something as strong as possible. I make atlas...
I was thinking of experimenting with polymer modified concrete for precast applications. I am a bit hesitant though do to the price of the polymers and one of the bigger benefits is the strong adhesion of PMCs. I am wondering how easy it is to get the PMC to release from the inside of a mold. My...
I have finally been able to find someone willing to sell me a ton of slag cement. Unfortunately I would be paying close to double the bulk rate and I also have to pay labor involved in shoveling out 1 ton from the truck. I wanted slag cement for precast concrete. The mix design I would use has...
The mold is a sphere that has been cut in half. I put the mold together to form a complete sphere, tape it up and cover it in shrink wrap and pour concrete into a hole drilled in the top. I don't create two half spheres that I try to join together.
Is water bath curing the best way to cure? I...
Hopefully I am not violating the rules, I am not an engineer, however every forum other than this that discusses concrete was either inactive or filled with spam. I make and sell atlas stones which are the concrete balls seen in strongman contests and am trying to figure some stuff out so I can...
