Replies

1. 
   rez | Nov 25, 2006 07:09pm | #1

   bump.

    

    

2. 
   VaTom | Nov 25, 2006 10:45pm | #2

   We talking concrete here?

   PAHS Designer/Builder- Bury it!

1. 
   gb93433 | Nov 26, 2006 03:35am | #3

   Yes it is about concrete forming. I read something that made reference to it and had not heard of it before.

   Edited 11/26/2006 12:36 am by gb93433

1. 
   VaTom | Nov 26, 2006 05:23pm | #4

   Won't have anything much to do with the forming, only finishing the open surface.  Probably long and narrow, T beams and such.

   Precasting is generally a factory process and will utilize immobile systems.  I once went to an auction that had an immense, barely mobile, screed on a tracked machine.  Used when you have acres of flatwork.  Never seen one before.  Interesting, but it didn't find a new home.  Too specialized.

   My best guess: your reference was about an automated system not dissimilar to what I use for my small flatwork.  Small engine that shakes the pair of screed boards which ride on the form edges.  Mine's pulled with what looks like a lawnmower handle, vibration isolated.  Automation would be simple. 

   You haven't filled in your profile.  I don't know your background and hope I haven't spoken down to you.PAHS Designer/Builder- Bury it!

1. 
   BillHartmann | Nov 26, 2006 06:08pm | #5

   Doesn't hiway road bed paving use a tracked screed system?

1. 
   VaTom | Nov 26, 2006 08:09pm | #6

   Never seen it done, but I'd expect so.  The screed I didn't buy was good for something like 60' wide in one pass.  Hauling and setup looked substantial too.  I like large machinery, but have my limits (and no crew). 

   Now that I think about it, the company selling off had been in the bridge business.  I dragged home a crane and elephants' noses.  And 4 vibratory screeds.  Only wanted 1, but that's not how they were sold.  Need any?  Flatwork's not anything I want to get good at.

   Was just noticing on our turkey day trip to tidewater how poorly the concrete interstate's held up.  Asphalt replacement.  You'd think they'd have it all figured out long since, but apparently not.PAHS Designer/Builder- Bury it!

2. 
   BillHartmann | Nov 26, 2006 08:21pm | #7

   I have never seen it when the concrete is placed. But manytimes I have seen the "forms" setup and a machine that is sitting up on them.BTW, you know all of the people that say that you need expansion joints in concrete every few 10's of feet.Well I-70 through Souther IL will go from 3/4 to 1 1/2 miles between expansion joints. They only place that they have them is at natural transistions such overpasses or bridges or even box culverts.

3. 
   VaTom | Nov 26, 2006 09:05pm | #8

   Yeah, expansion joints aren't a clear issue for me.  That wasn't the problem where we were driving.  Holes, randomly occurring.  Slalom at 75 mph. 

   I've got 70 lin ft (shortest measure) of patio outside here.  No expansion joints.  I almost got all the score lines correct, missed on the corner location.  Other than that, no problems.  Sits on 2" xps and I drive a 5k lb tractor over it.  Exposed aggregate, so it's a tad weaker.

   Gave a ballpark to an existing client for concrete topping her old asphalt.  She was flabbergasted that I'd come in so much less than the asphalters.  Scared her slightly, guess I should charge more.  Hasn't happened- yet, but I'll have to make some guess about joints.  Not that minor cracking will be an issue.  This'll be a screed, broom, cover and go home.  Short day, 2 guys, 30 yds.    PAHS Designer/Builder- Bury it!

4. 
   dedubya | Nov 26, 2006 11:40pm | #9

   most of that concrete that was used on I-81 & i-64

   came from the cement plant I worked at, we made cement

   from everything from red clay to dead possums, now that

   is the reason that the state is resurfaceing with asphalt,

   go figure.

5. 
   VaTom | Nov 27, 2006 02:26am | #10

   295, actually.  So now I know who to blame?   LMAO   You are talking about a portland cement plant?  Had no idea there was one in Va.

   Sure hope that had nothing to do with the concrete that holds up the 200 tons over my head...PAHS Designer/Builder- Bury it!

6. 
   dedubya | Nov 27, 2006 03:32am | #11

   YEP, there is one in Botetourt co., thats the one I worked at

   which is the closest one around, Martinsburg W.Va, Hagerstown

   Md.,Union Bridge Md., Knoxville Tn., and three in a row in

   Harlysville S.C. I worked full time in Va. then I traveled around

   for a couple of years working const./temp. shutdowns at most

   of all the above as a welder/ millwright/Indust. elec. -- needless

   to say cement dust is very bad for your health and the quality of

   the finished product is in direct relationship to who is in charge of

   quality control that 2nd and 3rd shift it is made.