>I hath conquered my fear of cement
look up the dangers of accelerants like CaCl2 in cement and some of the horrible accidents caused by it. there's a video on YT by a guy who got horrifying chemical burns on his legs from kneeling in it briefly. he had to get skin grafts

>>2975772
Yea, i do it carefully. Eye protection and stay upwind. Simple as.

Also: don't dip your dick in it.

>>2975772
Also: use 4 rock to 2 sand to 1 cement

It produces a passable concrete.

who fears cement

>>2975796
heh

>>2975767
cg, don't forget rebar anon. it greatly improves it's durability.

>>2975832
Not if you use rock

>>2975772
Don't wade around in fast set and you'll be fine

I'm a former concrete driver and now concrete batch manager, AMA

>>2975782
yeah if you want bullshit. Use like 75% of sand to rock by weight and like 19% of cement. For instance in a yard you would have like 1700lbs of rock, 1300lbs of sand and 325lbs of cement. Scale this up or down, that's a standard residential concrete mix.

adding low temp parrifin wax was can halt the curing process until the paraffin phase changes restarting the endothermic curing process making self heating concrete for cold temps. universities have made it last for three years.
dumping iron fragments in concrete can turn it into a giant resistance heating element currently being tested at airports for decreased deicing time and hopefully to reduce chems on bridges.

>>2975981
I want bulltshit... for foundation, go with 4 to 2 to 1, not pretty, strong

>>2975981
Also, put all the concrete rubble, rocks (preferably sharp) and any other hard ballast in there to make your $40 bag of portland go further.

>>2975781
>Don't dip your dick in it.
How the fuck are you supposed to make drainage holes?

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>>2975767

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>>2975993
You mean like this stuff?

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>>2976038
Nvm chatgpt says it's s terrible idea.

is white cement waterproof?

>>2976002
You're burning money. The ratio I gave is for a bog standar residential slave mix but for a footing or if you want a stronger slab increase the cement to like 450lbs per yard. Your sand and rock ratios are way off, you the rock is your strength, the sand just makes it all one thing. You're wasting money on cement and making way to sandy of a mix. For any normal application that isn't like block fill or shotcrete that rock to sand ratio I posted is basically the rule. There is nothing you will be doing that requires you to have 25% cement. There's nothing anyone does that does that. 900lbs of cement per yard is something you might consider if you need loaded 18 wheelers to drive on it the same day.

>>2975970
why is my mud late and the wrong color

>>2975796
pay your gambling debts fucko

>>2976147
4 rock
2 sand
1 cement

Where do you read 25%?

>>2975781
>Don't dip
I don't know any other way to tool the decorative grooves in my walls

>>2976038
>>2975993
NEVER EVER ADD IRON FILINGS TO FOUNDATION CONCRETE
That would be the absolutely most retarded thing you can do
Any additives without actually knowing what you're doing should be avoided

>>2975772
>kneeling in it briefly
He was literally crawling around in it the entire time he was smoothing out his garage slab. Just don't do that and you won't need skin grafts

>>2976163
>why is my mud late
because dumb fucks like you don't know how to measure, start a second project with your call back, or keep our driver there twice as long as you should because your crew couldn't afford their meth that week
>the wrong color
you ordered a flyash mix because you were drunk

>>2976421
concrete itself will do that, it has nothing to do with any of the admixes. The shit's PH is like 12. You're not supposed to let it continously contact your skin.

>>2976367
Start using weights and percentages you dumbass. Whether it's 1 yard or 700 yards, concrete isn't batched by "parts", it's batched by specific weight tolerances that are printed on the ticket and can be extrapolated from weighing a 38lb tester can.

>>2976444
Do you even scope? It's a fucking harbor freight job. I'll use parts.

>>2975781
dipping your dick in wet concrete is fine in moderation

>cement

>>2975993
>dumping iron fragments in concrete
wow...what an amazing idea...if only weve been doing this for decades already

>>2976454
This. When you're mixing with a small mixer you are using shovel-fulls as your measurement cup. It's not rocket appliances.

>>2976867
Exactly.

>>2976041
Yeah, as long as it's not black you're good otherwise it drowns

>>2975767
What about the other 3 ingredients needed to make concrete?

>>2977100
Pussy juicy, kidney stones, chopped organic almonds

>>2976039
you increase the conductivity and pass electricity through it, it becomes a resistance heater. i am excited for to pass muster could be a novel approach to fatbergs in sewers, bridge deicing quite a few application most should reduce depreciation rate of public infrastructure

bros we recently got a "wet batch" plant that premixes the concrete before you put it into a truck, it's so fucking fast. If I use any of our dry batch plants now I just want to manually load everything because the computer seems so slow but I'll just break the belt and blow powder out of the truck. This shit is incredible. We're working on dialing in the timing and sequencing for weighing up and dispersing the material into the plant's mixer, it's fast but it could be faster. But from the time all of the material is in the plant, it mixes while the ticket prints and I can put 10 yards into a truck in less than one minute as long as they're positioned properly so it doesn't stack on the hopper.

>>2975772
>don’t touch industrial muck
>don’t get chemical burns
Wow

>>2975767
Looks wet desu although I can't tell for sure without video.

>>2977612
Imagine the energy costs lol

>>2976041
No. If you want waterproof concrete, either add an additive to make it hydrophobic or by a mortar that says hydrophobic or something.
And it will never be completely waterproof, which btw is a good thing

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>11500 ADD (Anno Deucalion Deluge)
>still using portland cement slop
Geopolymers buildings have lasted tens or hundreds of thousands of years, why use slop that'll crumble in 50-100 years?

>>2976444
Wasted trips. Parts ARE weight measurements, dumbass

>>2977598
>imagine the smell

>>2976443
Yeah, so just wash it off if you get some on you. It's not that big of a deal. Your hands will dry out if you're working with it all day but they'll be back to normal in about 24 hours.

first worlders do be scared of concrete when it's in a mixer and wheel barrow instead of mixing on the floor while ankle deep in it

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>>2975767
Really?
Would you mind figuring out a concrete mix using G100 aluminum oxide, G40/G16 steel grit, and 12/18mm basalt fiber? Wall thickness is around 1.65" at minimum and a total volume of ~660 cubic inches.
I'm trying to make a burglary safe out of a reclaimed amsec star round door floor safe, 8" schedule 80 steel pipe, and a propane tank.

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>>2975767
Congrats, I'm just now planning to fight my own trepidation with concrete.

HOW DOES MY PATIO LOOK GUYS? Im planning to put a pergola on it. 6" thick slab

My question is "do I need that central post?" (Circle in the center of ground plan)

I'm concerned about the strength of the pair of 2"x10" boards I'd like to support the span with.
I live in a hurricane zone so I want to make it strong.

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>>2984209
For some reason these post in the wrong orientation...

Also: AM I MISSING SOMETHING A MORE EXPERIENCED PERSON MIGHT POINT OUT?

>>2983060
Why are you adding all the fancy admix bullshit? Just use normal concrete and stuff a matrix of bullshit scrap metal in there. Don't overcomplicate it. No one is going to try and get into your propane tank safe, or if they do they'll still manage to get into it anyways...

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>>2984217
It turns out to be within budget of the cheapest real burglary safe you can buy new and it's what real UL rated tool resistant safe's use so why not?
I'd only be saving like $100 at that point anyway.