Using slabs of concrete to create a drive-what do I need to do for prep?
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KMS Woodworks on Apr 24, 2012I would be more worried about them cracking and breaking. Their "previous" life was as a sidewalk up in the air ( not the same weight loading ) so they will not be of the same thickness needed to support thousands of pound of cars and trucks in a driveway setting. Are these "slabs" supported in some type of metal frame? I'm surprised that they did not break already in the "deconstruction" process. a sand bed would be my first recommendation as it would "contour" more to the underside. Given the size of these they are going to be very heavy on their own and once placed should stay pretty solid. Moving them around however is going to take some heavy equipment.Helpful Reply
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Jenni H on Apr 24, 2012I did consider that....they are all reinforced with rebar thoughout....which limits my ability to cut them down but I thought the strength would be adequate to drive onHelpful Reply
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Burco Surface & Decor LLC. on Apr 24, 2012how are you moving around slabs that big? they should be fine just start grading down the drive way where the concrete will be level with the yard and where rain water will drain in the direction you need it to.Helpful Reply
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Jenni H on Apr 25, 2012thank you for the adviceHelpful Reply
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Its Really Concrete, Inc. on Apr 28, 2012the steel will add flexural strength however no one recommends ANY steel OR mesh UNLESS the conc has 2" of conc above AND below any reinforcement. conc likes to be square &, if it isn't, will respond by randomly cracking to achieve ' squareness '. cutting is easily done by using a demo saw & dry-diamond blade avail at your local rental shop. good luck - that's going to be a great job when done ( sprinkle GABC into the spaces between slabs to lock them together )Helpful Reply
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Jenni H on Apr 28, 2012Thanks for the info...that is exactly what I need to know.Helpful Reply
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Its Really Concrete, Inc. on Apr 29, 2012depending on the size of the slabs ( we've cut / removed 6'x5' slabs incl re-bar from hi-rise bldgs ), they're going to be heavy & bulky - reccomend a track'd bobcat w/genl purpose bucket - this isn't an easy job so good luck ! ! ! we h/o's do work cheap :-)Helpful Reply
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