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Can You Overdose on Vitamins? #Vitamania

shagen454 says...

Yes you can. I know because I really liked those gummy bear vitamins, so tasty mmmm and had to look it up (they are potentially dangerous if you eat em like candy).

Stargate Macgyver Gag-Clear & Clean

Erotic Fetish Pizza Delivery?

newtboy jokingly says...

I like to make pizza, so I know what I'm talking about when I say I don't think she was nearly hot enough to cook it properly by herself. I think she should have called a hotter friend over to help her warm things up. That crust is going to be gummy.

The Slow Mo Guys - Jelly Tennis

Mao, the cat, eating a banana. "Mao loves bananas !!"

AeroMechanical says...

Cats like the weirdest things. One of my cat loves potato chips. Doesn't matter which kind or what flavor, though Doritos are his favorite. Oh, and Combos. He will attack me to get at my Combos (again, doesn't matter which kind). Gummy Bears too. I'm guessing he ate out of dumpsters a lot before he became my cat. Doesn't like tuna, though.

How To Make LEGO Gummy Candy!

How To Make LEGO Gummy Candy!

Rise of the New Atheists?

rex84 (Member Profile)

The Roots Of Unrest In Ferguson, Explained In 2 Minutes

bobknight33 says...

You know if the police just would hand out gummy bears then all the people would just chill out.

Just start shooting the looters and their tone would change very quickly.

Who knew metal milling machine could be such fun?

vex says...

I work in a CNC machine shop programming lathes. That isn't aluminum they are machining. It's definitely steel, probably 4340.

Carbide inserts are more than capable of cutting metal without coolant. Well formed chips absorb and carry most of the heat away. You start to run into problems with gummy materials (like aluminum) that form a built up edge on the cutter. In this case high pressure coolant can be used to help break the long stringy chips and keep them from sticking to the insert.

One case where using coolant can be detrimental to tool life is when machining a part with an interrupted cut. Think of sliding your finger over a surface with a bunch of holes in it. Your finger switches back and forth between making contact with the surface and gliding over empty space. In the machining world, this motion would cause abrupt transient temperature changes, and coolant can sometimes exacerbate the problem and cause the carbide insert to crack or chip.

(pedantry) I would hesitate to call that machine a mill. You can see the machine switching freely between rotating the part to provide the cutting force (turning) to rotating the tool (milling). It's more akin to a horizontal turning center with a milling spindle built in as well. Pretty awesome stuff! (/pedantry)

Street repaving in San Francisco

Porksandwich says...

Recycled mix (using old asphalt with other "stuff" that can be put into mix to get rid of it..like rubber tires) doesn't lay as well as new asphalt mix or hold up as well.

Since old mix uses old asphalt, it typically has oil, gasoline, diesel, etc soaked into it. All of these substances degrade/eat asphalt over time. It's why they don't use asphalt around fuel pumps, because all of the constant and pure spillage would eat holes in it. Turns the asphalt gummy...goes right into it and sometimes thru to the sub-grade rock and then soil. Also motorcycle kick stands don't do well on asphalt, contaminated or not..especially on hot days. Asphalt will become pliable on really hot days and a focused direct pressure like a motorcycle kickstand can punch a hole into it that be deep enough to let the bike tip over. Use a wood block or piece of plywood to fix this and spread the pressure.

I used to work in the asphalt business, mostly rolling it. My dad worked in it more substantially than myself working on airport jobs, highways, etc. Many of those jobs won't allow old asphalt to be used in their mix. And they are big enough to force plants to switch over from remixed (old and new) to all new mixes. You'll notice that jobs done with the new mixes hold up much longer, look better, lay better, hold their heat better during the laying process, and come out much smoother looking and less "dirty looking" upon finish. I am guessing at this, but I believe it to be because the asphalt has more tar and less other chemicals and the tar is able to absorb any dirt you might pick up when you move to existing surfaces onto the new asphalt. Where the remix (containing old) has gasoline, etc breaking down the tar and less fresh tar to begin with, so that little bit of dirt you pick up transfers to the remix asphalt like a magnet.

Highways probably won't have as much surface area covered in long term spillage as stop and go traffic where it will be focused at the lights, stop signs, along edge of the streets where people park. But the highway will have big sections of highly contaminated asphalt where semis flip, car wrecks occur, etc. So these same sections if they are remixing it on the go, will end up with a bunch of really bad asphalt on or just after it if they don't throw it out.

And to clarify a few things upon incase people are unfamiliar.

Asphalt plants are usually multi purpose. They are usually a stone quarry with an asphalt plant situated somewhere on site. They filter and crush the stone into piles for sub grade work of various needs. And they draw from these piles to feed the asphalt plant. They do new mix and recycled mix (old mix) which I'll explain below. They also often times have sealer (the black coating you put on parking lots and driveways), I'll explain it below. Roofing tar, regular/asphalt tar, and crack filler..and I'll cover these below as well.

The plants have some human guesswork involved, they have to estimate tonnage and how much tar should be added. They screw up pretty often. It wasn't unheard of for us to get super tarry asphalt mixes where it was like goo coming out of the truck. Or no-tar mixes where it was just slightly black painted rocks. Or mixes where we called them "burnt" where they pumped in their cleaning mixture into the mix and it was breaking down the mixture to help get it out of the hoppers of the plant. These were usually people being trained who hit the wrong button without realizing it.

The plants have to clean the mixtures out of the hopper (where they dump it into the truck) to cycle over to a new mixture they keep in on-site silo looking things that stir and heat it. Which the silos also have to be cleaned at the end of the day or heated all night lest they hardened and stop up the whole thing. They usually stop heating all night as it gets closer to winter season because they don't do enough business to make it worthwhile.

Ok mixtures:

I didn't mention base mix anywhere...but it's why they typically have to switch over to different mixes, because places need base mix instead of finish layer....the layer you see when finished looks less rocky than base and is pliable.

Base mix = larger aggregate rocks, much more rocky. Doesn't have much fine rock in it. It's meant to be something you can quickly lay that will hold up the weight of heavy vehicles right away. Usually this is only used on fresh roadways where they are laying directly over rock sub-grades. It makes it easier to lay the finish layer smoothly, makes for a cleaner looking job by locking the rock and it's dust in...and is cheaper than using all finish. You can almost go from laying base mix to laying finish layer right on top of it with no delay. You can't do this with two layers of finish, because it's too pliable and it has to cool down for the heavy vehicles to drive over it without squishing it out and messing up the layer you just laid.

New mix asphalt = Tar mixture with aggregate like fine almost sand like rocks along with larger rocks to give it stability larger rocks are maybe the size of your pinkie nail at the largest. Tar is mixed throughout, the whole mix is constantly stirred and heated inside the plant, drawn into the hopper and dumped in a truck that pulls underneath. I am told that this mix used to be even better in the past, but now air regulations require them to "inject" their dust from rock crushing into the mixes so again this can cause the mix to be less tarry due to the dust being absorbed and they can completely ruin it by injecting too much.

SCAM ALERT: Look below remix as it pertains to both.

Remix (old and new) asphalt = Very similar to new mix, except they grind up old asphalt that they have sitting on-site in the stone quarry congealing into a big pile depending on it's contamination. This will depend on percentage they are legally required/allowed to put into these mixes. Less of the remix in the mixture, the better it is....less contaminates. Sometimes they even put rubber tires and other rubber products into the mixture. Although they don't do that much here. SOMETIMES it is desirable to have rubber in the mixture like running tracks, where they are springy. This is a special mixture, and it's a massive PITA to lay because it's really gummy and sticks to everything along the process.

SCAM ALERT: They typically do this to older people. But someone will stop and tell you they are working on a big site close, and they are going to have some extra material at the end. Usually you would dump this at the plant or somewhere you have set aside. They want to help you get a new looking driveway. They will lay the asphalt less than an inch thick. It will look really good when they finish. A year later it will be broken apart in most cases. Because they didn't tar, and they laid it too thin. You can lay asphalt thinner if you tar really well....but you want to lay it at least a inch and a half per layer or so. Sometimes you have to lay it thin near man holes and drains to not block water. So don't go crazy on somebody because of this if you see them doing it in certain places. Generally they try to average an inch and a half across a job per layer on finish. Thicker on base mixes since it has larger rocks in it and it has to be at least as thick as the biggest rock in it.

Sealer (the black coating you put on parking lots and driveways) - This is almost like a black paint in some circumstances. Some of it has chemicals, I think creosote, which react to the sunlight and cure it to seal it to the asphalt. Depending on what you buy, you may have to mix water into it to make it suitable for the task. Some come pre-mixed and you just have to stir. Usually you put two coatings on new asphalt, one coat if it's been sealed before. Sealer WILL NOT make your driveway last longer by any noticeable degree. It will make it look dark, and repel chemical spills to some degree. However chemicals will still penetrate as you can't clean up everything that drops. ALSO, sealer makes your driveway much slicker. This is why they don't use sealer on roadways, if they are using some kind of treatment it's something else because sealer fills in all of the fine holes in asphalt and makes it more slippery because of this..especially in the rain. Sealer has to cure for a couple days, you can't drive on it and it can't get wet. So listen to them when they say they don't want to seal it due to weather. Don't let them seal it in the spring or fall. Do it in the summer so it's nice and hot and not much moisture. Sealer looks more brown going down than black. But it cures to black.....it almost looks like chocolate cake mix. Dunno if they taste the same.

If you are sealing your own driveway, do not get it on you. It burns like a mother, I've gotten it on myself and if you don't clean it off right away it will burn you like a really bad sunburn after being exposed to sunlight for awhile. Some people are not bothered by creosote (if this is the correct chemical in sealer)...but better to not find out..because it hurts if you are.

SCAM ALERT: People will seal your driveways with motor oil or even too watered down sealer. They look very similar going down. There is no easy way to tell the difference besides knowing what they smell like. The first rain will turn your motor oil covered driveway into a mess. We have gypsies in the area pretend to be local businesses and pull things like this, it's bad. They disappear at the end of summer and the businesses are left with people pissed off.

Roofing tar - Runnier and less thick than regular tar. It's meant to be pumped onto roofs and run down to fill in holes and places water can get in. If you use this on your driveway, you're pretty much going to end up with a huge mess for years. Because it will continually heat up in the sun and liquify again being tracked into your house over and over and over.

Regular/asphalt tar - Use this, like in the video, along curb sides and between old and new layers to help seal out water and keep the layers sticking together as you put down the new layer. You wouldn't need to tar between a base and finish layer if they were laid a day or two apart because the base layer would heat up again from the finish layer and stick. However if the base layer is older..like a couple weeks or a month. You would probably tar between them. Anything else..you tar between...concrete, old asphalt. The only exception would be sub-grade rock, however sometimes you even tar this, especially if it's in a grade critical location...where you can't have the asphalt humping up even a little. But on a typical driveway, the rock layer has enough jags and spaces that a layer of asphalt will cling to it just fine.

Crack filler - You would use this before sealing your driveway, not after. You can also use it alone to fill in gaps in your driveway and try to seal out water. So it doesn't get into the crack, freeze and blow your driveway up. The best crack filler is rubberized, so it will expand and contract. Plus it also isn't as prone to liquify again in the heat and stick to your car tires and shoes. It has to be heated up substantially to liquify, but I've seen non-rubberized begin to liquify in direct sunlight on a 95+F degree day. I try not to step on the cracks on the really hot days, as I'd rather not find out if it's going to stick to my shoes.

kulpims (Member Profile)

How To Impress Your Kids: Nerds Candy + Potassium Chlorate

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