| Name: |
rude evin
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| Subject: |
Back to the projects........
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Date:
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4/25/2007 8:54:34 AM
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Has anyone had a small concrete project done lately in the StillWaters area, say parking area size, and what was the cost of the mix and cost for the finisher?? Any names you would recommend for a small job?
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| Name: |
MotorMan
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| Subject: |
Back to the projects........
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Date:
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4/25/2007 9:28:21 AM
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Ask him "Do you use a 'slump gauge' or how the concrete is checked. This will makeyou sound informed.
Make a specific contract. Make clear how many bags of cement powder are in each truck mix of concrete.
URL: Slump_Test
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| Name: |
Ulysses E. McGill
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| Subject: |
Back to the projects........
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Date:
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4/25/2007 9:44:02 AM
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You've got to be kidding.......
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| Name: |
Chevy4x4
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| Subject: |
Back to the projects........
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Date:
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4/25/2007 1:04:01 PM
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Make sure concrete people put in expansion joints!! Last driveway/sidewalk I saw poured on the lake was cracking due to no expansion joints.
Last driveway I poured the concrete cost me $65 per cy. I charge $60 per cy to finish it for a grand total of $125 per cy.
This was 6 months ago in a lower priced community so you can expect to pay more.
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| Name: |
HTMLman
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| Subject: |
Hey 4x4
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Date:
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4/25/2007 5:20:18 PM
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There is a "ruleof seven" that I forgot. Its something like "After 7 days it is twice as strong. After 7 weeks it also doubles. I'm not sure what the others are.
The last really great concrete I got was from a Federaly funded sewer project. They would gage every day to keep them honest. I asked one of the drivers that if he had a few cu yards after a day's pouring, to sell it to me.
I've had some that looked good when they poured but cracked in thre years. In FL. No freezing and had expansion joints. Just weak concrete.
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| Name: |
roswellric
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| Subject: |
I remember that.....
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Date:
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4/25/2007 5:50:48 PM
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I used that to test some women I knew when I was single....
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| Name: |
PikeSki
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| Subject: |
Rebar?
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Date:
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4/25/2007 5:53:52 PM
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Back in Indiana I had done concrete work as a younger man and we always put rebar in the slab (and also the footers). Everyone told me that it made the concrete stronger. We always got what they called "normal" cracks in the slab in about 1 year.
I had a slab poured for a workshop (26' x 24')here in Atlanta by a very reputable cement man. After forming up and passing inspection the guy was ready for the cement truck. I asked when he was planning on putting in the rebar . . . he said they don't put rebar in the slab as it makes it weak and crack, they only put rebar in the footers. I was very concerned about his answer.
It has been over 4 years since this slab was laid and there isn't the slightest crack anywhere in the slab.
The theory is that when you have a 4" thick slab and put a piece of rebar in the middle of it you now only have 2" thick concrete at this point which makes it weak anywhere the rebar is. I wouldn't have believed that putting rebar in the slab would make it crack but I'm a believer now.
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| Name: |
8hcap
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| Subject: |
I remember that.....
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Date:
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4/25/2007 5:57:25 PM
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Rebar?????
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| Name: |
Feb
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| Subject: |
I remember that.....
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Date:
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4/25/2007 7:36:48 PM
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No, I think RR was referring to the 4 inch rule. LOL
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| Name: |
roswellric
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| Subject: |
Well
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Date:
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4/25/2007 8:00:11 PM
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I have a ruler with a different scale :-)
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| Name: |
Chevy4x4
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| Subject: |
28 days
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Date:
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4/25/2007 9:21:32 PM
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It takes concrete 28 days to reach it's greatest strength. Although it does continue to get stronger over the years, but very slightly.
There are roughly 8 different types of cement that greatly influence concrete strength, with numerous other factors thrown into the mix. So yes, it does greatly depend on the quality of the concrete .
Rebar is used to give concrete useful tensile strength by overcoming compressive forces. IE: walls, beams, and cantalivers.
Most good finishing crews will put rebar into your driveways and sidewalks as it does resist cracking caused by curing shrinkage, thermal expansion, and contraction.
A general rule of thumb with concrete is: You can't stop cracking, but you can manipulate it. Expansion joints typically do the job if properly placed.
Also: on the rebar note: make sure you finishing crew uses some type of rebar basket and does not "toss and stomp down" bars into the concrete. The baskets are used to hold the rebar in the center of the concrete where it adds the most strength. Some people don't doe this, and you end up with rebar on the ground, and not in concrete...
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| Name: |
Chevy4x4
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| Subject: |
oh, and Pikeski...
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Date:
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4/25/2007 9:31:08 PM
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Concrete adheres to steel so that statement can't be true. The steel and concrete become one. Also alot of thermal expansion coefficients involved, but you'll have to ask a physics person about that. As I understand it, steel and concrete expand at the same rate, so reinforced concrete can still crack. I've seen it :)
Rebar is mostly used to resist tension, shear, bending, as well as compression forces. Thats why I can drive a skid steer across a sidewalk and it doesn't break.
So it is very possible that a 4" slab might never crack given the concrete was properly cured and of high quality.
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| Name: |
rude evin
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| Subject: |
Thanks all........
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Date:
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4/25/2007 10:20:59 PM
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like trying to drink from a 4" water hose.........!!!!
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| Name: |
Osms
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| Subject: |
Wait a minute........
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Date:
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4/25/2007 10:27:30 PM
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No one's discussed welded wire mesh reinforcement in slabs--and what about putting fiber in the concrete to reduce surface cracks.
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| Name: |
roswellric
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| Subject: |
Rebar?
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Date:
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4/25/2007 10:29:47 PM
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I think you are lucky.
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| Name: |
roswellric
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| Subject: |
Good point
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Date:
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4/25/2007 10:31:47 PM
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It will.....
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| Name: |
rude evin
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| Subject: |
Wait a minute........
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Date:
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4/25/2007 10:34:32 PM
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When one of the guys first looked at my cart path project to the dock, he wanted to use all three.........wire mesh, fiber and rebar!!!!!!!!!
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| Name: |
Chevy4x4
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| Subject: |
Heck...
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Date:
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4/25/2007 10:38:02 PM
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Might as well throw a democrat in the mix!
Kiding...
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| Name: |
rude evin
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| Subject: |
Heck...
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Date:
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4/25/2007 10:40:44 PM
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Would that be Rosie or Imus!!!!!!!!!!!
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| Name: |
Osms
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| Subject: |
They're to slimy..
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Date:
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4/25/2007 10:56:18 PM
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You can't ask concrete to stick to slime.
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| Name: |
Ulysses E. McGill
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| Subject: |
Back to the projects........
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Date:
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4/25/2007 11:10:33 PM
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I think the price for concrete is much higher unless it has come down again; I haven't checked lately. It was $65 a yard (rated for 3000psi) 15 month ago when I did my garage slab, but was up to $85 by the time the garage was finished. I can't remember for sure, but I believe a good friend (who is a builder) told me it was over $100 this winter....and of course adding fiber, re-bar, wire or lime, and upping the pressure rating, also adds to the price.
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| Name: |
Feb
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| Subject: |
Are We discussing Docks
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Date:
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4/25/2007 11:51:23 PM
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Again? As Cat would say: "Oh H3ll."
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| Name: |
Osms
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| Subject: |
Speak for yourself....
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Date:
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4/26/2007 7:59:38 AM
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Is your Dock slimy? If so, better see a Doc!! LOL.
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