Just poured concrete--some questions

Just had a new shop built a couple weeks ago and poured some concrete today, I had a question or two. How long before I can set my tool box on the slab and how long before I can drive something on it? My tool box I don't suppose weighs over 1000lbs as My brother and I lifted the bottom section into the back of my 3" lifted truck and the top section went in pretty easily also. Will also be setting an old Forney welder on it and a couple of other lighter things on it. The heaviest tractor for a while will be no larger than a 1066 or so(12,000lbs+/-). Just wanted to know your guys opinions. Had a couple of neighbors over today and help pour it and found out one of them knew how to use a bull float pretty good. Looks really good, but want to know your guys opinion on how to take care of it.
Poured 6.5 yards--not a big pour but big enough for the people pouring it. Still ended up 3 ft short of the main pour--don't know how, me and the concrete guy added 1/2 yard, and I was really accurate on my grading--figured maybe he may have shorted me accidentally, but what to do? Anyway, thanks for any advice.

P.S. Thought I would mention that I poured the section to drive on 6 inches deep and the part to set my box on at 4 inches and it was C-4 (?) he called it a highway grade--the same thing poured in the highway. Paid $72/yard for it.

http://www.wrmeadows.com/wrm00035.htm

Place the welder up on a couple 2x4 blocks, so it sits off the concrete. The moisture will be coming out of the slab for a while, not to mention yearly freeze/thaw cycles (depending on where you're located)

Highway grade concrete which is what you apparently bought and from the price that sounds about right also.

First on curing:

Watering down the top is an excellant idea. Any type of curing compound is also a good idea. After 7 days you should spray it with Lynseed oil and the top will last forever

on when to put stuff on it:

Highway grade mixes (3000 psi most likely is your mix) cure in 7 days. Full cure is in 28 days.
So PLEASE WAIT at least 3 days before the tool boxes and 7 days before the tractor. Personally i'd wait 14 days for hte tractor.

Complete cure of that concrete will actually take up to a year. Most people don't realize that though.

If you have any more questions please ask. I'll try to help.

It is simply a sealer that is cheaper than some of the high grade sealers out there. There will probably be alot of argument about this as to what to seal it with etc. but if you want to look at the facts if Highway standards dept's use it it is a GOOD product I can assure you of that. It undergoes alot of testing. The state like anyone else trys to save money but get the best job and this is one product that accomplishes that.

It is actually used for sealing numerous things other than concrete too.

If you have the cash though and are willing to spend it a high grade sealer from Master Builders would do a nice job also.

Linseed is a sealer. see above response!

It is applied usually with a simply spray vacuum canister. It is to be applied 7 days or more after the pour. You usually want a clean surface to put it on though. After you apply it you only need to wait another day for dry time. Two coats are recommended but 3 or 4 won't hurt it either. It is sprayed on in a thin layer.

ALL that said though if you plan on using an epoxy paint you probably want to actually use a curing compound instead of the linseed. Curing compound creates a barrier to keep in the moisture longer thus making the concrete cure slower. You will want to apply that one day after the pour. Or as soon as you walk on the concrete. I would leave it go at that and then next year the epoxy should bond quite well because the curing compound will be gone by then.

The depth should be 1/4 of the thickness. If the slab is 4 inches your joint should be 1 inch depth. but for only 6.5 yards i wouldn't think you would even need any to be honest. I don't know the Sq Footage though and that is how you determine them. Roughly speaking for a 4 inch slab you only need 1 jt for every 5 cu yards.