Poured concrete into an atlas stone mold and it came out terribly.

Concrete is full of rocks and therefore will not yield a perfectly spherically smooth shape. You can try adding self leveling compound or filter the rocks out and just use the powder

>>1239996
Tap the mold for awhile aft you pour it, this should work out any air pockets near the surface which is what caused the voids

>>1239996
Next time try mortar mix. It's just sand and cement minus the large stone aggrigate. Will settle better.
Also as >>1240013 says, you have to vibrate or tap the mold to get air bubbles out.

>>1239996
Get an electric palm sander and run it without paper all over the outside of the mold. The vibration will pull the cream to the outside. Mix your concrete fairly stiff too.

>>1239996
>Every reply is viable information.
Screw this, I'm going back to /b/

Look for a commercial contractor build supply. They'll have access to bonding agents, admixtures, and patching compounds that Home Depot won't have. They'll also have salesmen who's job is to know how these products are applied.

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Use this

>>1239996
No idea how to fix that but for future casts vibrate the mold so air pockets can rise to the top.
Your mums vibe won't cut it, we use 1/2 hp vibrators at work.

>>1239996
>to fix...
>sand off all that white shit
>fill in any big voids with mortar
>let dry
>sand down mortar/concrete to your final ball shape

>to prevent...
>vibrate or bump the mould until air bubbles stop coming to the surface

>>1240066

But aggregate will let him have a more liquid mix without loosing strength, liquid mortar mix will not be that strong.


As others said op you gotta vibrate it, also look up concrete countertop mixes, superplastercisers in particular will allow it to pour better.

Skim coat it with stucco.

>>1240149
>salesmen who's job it is to know how to sell you expensive and irrelevant crap whichever gives them the biggest commission?

>>1240229
Any aggregate will sink, dont put in any.

Vibration to get the air out, also, line the mold with cheese first, you can use single cream and flour but mix it until its thick enough to stay put when the concrete is poured in, it removes air bubbles.

>>1240274
You have never seen exposed agrigate have you?

>>1239996
Thrall pls go

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>>1240182
anon's mom vibrator

she's a big girl (for you)

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>>1240274
>line the mold with cheese first

i've been doing it wrong for so many years

>>1240182
This ,it removes all the air bubbles

>>1240345
Perhaps you are wondering why a mod would ban you before being reported.

Is it even a problem for it to not be smooth?

You can still train just fine with it as long as it doesn't have any really bad spots that can cut you.

I would just sand that one down and run it