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  • Easy to Make Concrete Bowls and Planters...

    Efflorescence is different, it takes years. White crystalline stuff weeps out of the concrete. Correct about 28 days: that's when they test for strength.

    To get white concrete, use WHITE Portland, white sand, and white marble chips.

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  • Easy to Make Concrete Bowls and Planters...

    Based on the finished concrete surfaces you show, and your words about mixing water, I must say you're working rather dry. That's fine if you want the holey texture, but normal usage is to add enough water to get a soupy mix like chili, pourable but not runny. I have cast into glass globes and my concrete comes out really shiny! That won't last outdoors, but it's remarkable. Also, dunking a hardened casting still in its mold into water for a week is overkill. Water only enters via the exposed surface. And very little is needed if you mixed it as I suggest. Much more important for strength is sloshing and bouncing the mold, when half-full and then 3/4 full and all the way, if possible. See www.archicast.com for serious fun with concrete. Shown are our really big spheres guarding the Fed...

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    Based on the finished concrete surfaces you show, and your words about mixing water, I must say you're working rather dry. That's fine if you want the holey texture, but normal usage is to add enough water to get a soupy mix like chili, pourable but not runny. I have cast into glass globes and my concrete comes out really shiny! That won't last outdoors, but it's remarkable. Also, dunking a hardened casting still in its mold into water for a week is overkill. Water only enters via the exposed surface. And very little is needed if you mixed it as I suggest. Much more important for strength is sloshing and bouncing the mold, when half-full and then 3/4 full and all the way, if possible. See www.archicast.com for serious fun with concrete. Shown are our really big spheres guarding the FedEx Forum Plaza in Memphis.

    I think 30 days of weather is considered enough cure to not have alkalinity issues.

    Just how long do you believe concrete is 'hot'?

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  • danzo321 commented on seamster's instructable Build a Wooden Fence and Gate4 days ago
    Build a Wooden Fence and Gate

    I know it doesn't harden unevenly, capillary action /osmosis distributes the water. Cement powder is hydrophilic. I know we use it reliably building wheelchair ramps etc. It may have small air pockets, but they don't hurt anything. Go dig out some old fenceposts.

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  • danzo321 commented on WUVIE's instructable Easy to Make Concrete Bowls and Planters...8 weeks ago
    Easy to Make Concrete Bowls and Planters...

    No, I don't see it.. Big balloons? People tried weather balloons. Pressure of air is nothing like the weight of concrete. A lot of thought has gone into sandboxes, big strong crates of sand, and you hang a shaped scraper from a pendulum and scrape out the sand to leave a hemisphere void of damp sand. In theory you could do it with sand-mix. This could be the koi pond or it could contain a weather balloon which you fill to cast a hemisphere.

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  • danzo321 commented on AverageJoesJoinery's instructable How to Make a Garden Gate10 months ago
    How to Make a Garden Gate

    Not sure you talked about the direction of the diagonal member but it must run from the lower hinge area up toward the upper outer corner. It is transferring the weight down to the lower hinge.

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  • Drunken Chicken Under a Brick With Peach Jalapeño BBQ Glaze

    Do you marinate both sides of the bird or just the skin side as shown?

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  • danzo321 commented on diymontreal's instructable Large Concrete Planter1 year ago
    Large Concrete Planter

    Form oil may be brown and smelly but I never see or smell it on the finished casting. In professional use, molds are built of Medium Density Overlay, plywood with kraft paper permanently glued to one or both sides. Form oil dampens that paper and stays there.. maybe the 'oil and water never mix' truth.

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  • danzo321 commented on MrFixItDIY's instructable How to Restore an Old Wheelbarrow1 year ago
    How to Restore an Old Wheelbarrow

    Maple is generally not used for outdoor purposes. It just doesn't last. Hope you varnished the pee out of it.I soak rusty things in vinegar, wirebrush, wash, and hit them with rust neutralizer before new paint.

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  • danzo321 commented on audreyobscura's instructable World's Easiest Silicone Mold.1 year ago
    World's Easiest Silicone Mold.

    Glass and granite? Piece of cake. Now glue a polyethylene bag to a silicone rubber ball.

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  • danzo321 commented on JettaKnight's instructable Cast Concrete Bench1 year ago
    Cast Concrete Bench

    No, I don't but let me know after 4 straight days of rain.

    A concrete bench really needs to sit on a foundation, not bare dirt. Not going to get into it too deep, but digging good sized holes and filling with pebbles or even concrete are the approved things you should do.

    Four inches is considered the best thickness for concrete things like this. 2 1/2" is safe but pushing it. Big problem with concrete like this is, water entering tiny cracks and rusting the rebar. In good concrete, when it's demolished, you see unrusted rebar.

    You talk about whacking the mold so much, I disagree with the method. If you lift and drop the mold, you really free that air. On jobsites you'll see guys use a regular shovel to lever-up the mold and then let it drop - just a couple of inches, one side at a time, is fine. Whacking is hazardous to your mold sides!

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  • danzo321 commented on monickingbird's instructable Concrete Octagonal Driveway Pavers1 year ago
    Concrete Octagonal Driveway Pavers

    Any oil is better than no oil! Did you use his stuff?

    1. Form oil! Buy a gallon from a concrete yard.2. Core molds (removable centers) might be pink or blue styrofoam, tapered to release easily.

    Water dissipation: what is this about?

    You did all this, and never learned about form oil?

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  • danzo321 commented on jdkjdk's instructable Self-watering Concrete Planter1 year ago
    Self-watering Concrete Planter

    Not a thing wrong with the casting technique but I'm wondering about the botany. Some plants should not have 'wet feet' which you will have from water always coming in from below.

    After a couple of months out in the weather, the concrete won't be 'hot' any more.

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  • danzo321 commented on slicelab's instructable 3D Printed Concrete Molds Part 31 year ago
    3D Printed Concrete Molds Part 3

    Didn't you use any form oil? All that vibrating no doubt gave you good strength, but bubbles are bad.. I'd slosh the mold around when just half, then 3/4, filled.

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  • danzo321 commented on diymontreal's instructable Large Concrete Planter1 year ago
    Large Concrete Planter

    The correct oil for concrete casting is called Form Oil, and it's close to diesel fuel, so use that next time. Because the 2 gal bucket has those strength ribs around the top, I would go find something else, like a wastebasket, and we use sand and maybe steel to weight it down. Quikcrete should take overnight to harden, in the summer, so you did something wrong. I would use a piece of sheet metal as a chute to slide wet mix in. Pretty good surface anyway!

    You know about oil and water? The form oil never shows up on the concrete surface. Maybe it evaporates too. If you were going to make bucket casts a lot, you'd have an air hose nozzle in the bottom and hook up an air hose to pop the casting. Or at least a hole you could block with clay or something, to break the vacuum.We should also talk about superplasticizer but I don't know if hobbyists can get it in small quantities.

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  • danzo321 commented on mikeasaurus's instructable Unusual Uses Ziploc Bags1 year ago
    Unusual Uses Ziploc Bags

    I store old magazines in big ziplocs and then in a corrugated box.

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  • How to Cook Low and Slow BBQ Pulled Pork

    Standard good Memphis practice. I like the way your spice mix looks like gold to start. Wood smoke matters the most at the first couple of hours. I never saw the charcoal snake but I like it. Don't be thinking that snake will last 12 hours!

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  • danzo321 commented on diycreators's instructable How to Make a Fire Bowl2 years ago
    How to Make a Fire Bowl

    Go to a restaurant supply store. They have a huge range of plastic and stainless bowls. If you get a 22" and an 18", between them you'll make a very nice concrete bowl for fire or birdbath or sink.

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  • danzo321 commented on diycreators's instructable How to make a $7 floating shelf 2 years ago
    How to make a $7 floating shelf

    Please talk about boring the dowel holes a little.

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  • Floating Ghost!!! Low Cost Easy to Make!!!!

    "Splat mat"? I love it!!

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  • danzo321 commented on MadeleineDouglas's instructable Clamping at ANY Angle2 years ago
    Clamping at ANY Angle

    In regular woodworking, you secure the diagonal piece with glue plus 18 ga nailgun. If you clamp a diagonal into a 90º, you have to be spreading the angle. The angle blocks are great but not in this construction.

    And it strikes me that any but the lightest clamping will bend the 90º to 93, 95, 97º.. Keep a good square on the angle and give it a try. You might also create a double hooked piece that prevents spreading. Could also place the rt-angle assembly facedown on a piece of plywood with wood strips hard against both sides so it can't spread.

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  • danzo321 commented on blakeearth's instructable Lava Lamp from a Wine Bottle2 years ago
    Lava Lamp from a Wine Bottle

    Have you experimented by pouring your oil liquid into a baggie, and seeing how that behaves in a vat of your other fluid?

    Seems like mineral oil is utterly colorless [water-white] and not cloudy. Tried it?

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  • danzo321 commented on lonesoulsurfer's instructable Steel Wool Emergency Fire Starter2 years ago
    Steel Wool Emergency Fire Starter

    Cool but I also like starting a fire with a gum wrapper. Do you know that one?

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  • danzo321 commented on icreatable's instructable How To Build A Floor For A House2 years ago
    How To Build A Floor For A House

    "tounge and goove" should read 'Tongue and groove' and is now commonly called center-matched lumber.

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  • danzo321 commented on danzo321's instructable Make a giant statue2 years ago
    Make a giant statue

    It's ordinary styrofoam. I might have said I used a Sur-form tool on it after the saws, and then we sanded it. Thanks.

    There's a multi-location company, Drew Foam, that sells plastic foam. Most of their sales are 2' x 4' foam sheets used for insulation and packing. They have the big hotwire cutters to make many large foam parts as well.

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  • danzo321 commented on danzo321's instructable Make a giant statue2 years ago
    Make a giant statue

    I believe I covered that, no?

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  • Making a silicone and ultracal matrix mold

    Whew! I hate to say it but this technique, while valid, uses about 5 times the silicone necessary and many extra steps. You insist on UltraCal which is hard to find and is far harder/stronger than needed. Its only benefit is, absolutely zero expansion, making it necessary for precision foundry work. Go with any casting plaster, you won't see a difference.Knocked out by your plasticene sculptures of wee gears but they seem too delicate to work with as shown here.

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  • Low Budget Knife-maker's Bench Grinder

    Don't know where you might be but you only get 120V out of an American outlet. Who led you to believe otherwise?

    You;re right! It is a bit confusing. The voltages expressed are just approximate. The most common pairs are 110/220 and 120/240.Due to line drops, the actual voltage into your home will vary with the distance from the transformer on the pole. It may be several volts above 120 if close, and as low as 107 if some distance away.Just to cross your eyes further, the actual standard is supposed to be 117/234 VAC. L

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  • danzo321 commented on jgrachie's instructable Build a Raised Garden Wicking Bed2 years ago
    Build a Raised Garden Wicking Bed

    What is simulated cedar? The best outdoor woods are teak, cedar, cypress, redwood.. Worst might be maple.

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  • danzo321 commented on seamster's instructable Build a wooden fence and gate2 years ago
    Build a wooden fence and gate

    Tell us about your decision to rout the latch into the wood. Never seen that before.

    Making the gate frame, you're screwing into end grain. This is okay for positioning lumber but never count on such a joint. If you put a block of 2x4 inside each corner, and screw into that from both directions, your joints will be far stronger.

    Can't argue with your results but you can see it would be faster to put up your fenceboards, then snap a line and cut them all at once - if you're good with a circular saw. Some want a nice curve on the top line of the gate so you'd use a saber saw.

    Not to get all know-it-all but I'm telling ALL newbies and a few experienced people, don't design anything with joints where you screw or worse, nail into endgrain. Can also use the galv steel joint reinforcers.

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  • danzo321 commented on halledean's instructable Leather Underbust Harness2 years ago
    Leather Underbust Harness

    Is this a sort-of kinky thing now? Does it narrow your waist or is it around your ribcage? Dyeing leather.. is this something that sweat can dissolve?

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  • The Pallet Bible: Finding, Inspecting, and Dismantling Pallets

    If you have a regular-sized hole you are better off gluing a peg (dowel) in it than fooling with putty.

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  • Travel To Your Antipodal: The Opposite Side of The World

    Aahhh, did this in Jr high.. we're all in the Indian Ocean

    Aahhh, did this in Jr high.. we're all in the Indian Ocean

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  • danzo321 commented on jgrachie's instructable Build a Raised Garden Wicking Bed3 years ago
    Build a Raised Garden Wicking Bed

    <Besides the wood is cheaper, > Cheaper? than what? Untreated?

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  • danzo321 commented on Creativeman's instructable How To Make Faux Rocks3 years ago
    How To Make Faux Rocks

    You did a fine job if that's the look you want. I'd want them less pillow-y. Most older homeowners know too well that bags of concrete mix eventually become rocks, but the familiar pillow shape.. You can take a mineral hammer to them and get a craggy rock look. And if I were a burglar, I'd look under every too-perfect rock for the key!

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