Don’t try to use a regular concrete mix for the 1/2-inch-thick area or over the plywood, rather use a polymer overlay cement rated for that thickness. There are many different kinds of concrete slabs. Viewed 7k times 2. DIY Projects & Ideas. CONCRETE SLABS. (Used with SB Slab Bolsters and PC110 Rebar Impalement Safety Cap) (Shipping leadtime: 1-2 business days) $2.50 $1.95: Quantity: 0 review(s) Dayton Superior Plain Slab Bolster Upper, Class 3, 2 inch X 5 Ft. (1) DAYTON-125121-1 : Dayton Superior 125121 Plain Slab Bolster Upper, Class 3. Find the effective span which is lesser of (i) distance between centres of bearings, and (ii) clear span and effective depth. Multiply the width times the length times the height (W x L x H). © Copyright 2020 | everything-about-concrete.com | All Rights Reserved. It is too thin to use as a flooring just by itself; however if you need to resurface damaged concrete, a 1-inch layer is a good amount. In this article, we will examine the importance of reinforcing concrete with rebar and the proper steps to go about this. However, hard-steel troweling which commonly has a higher compressive strength than the base course is used as topping for heavy duty slab. How-Tos. I'll show you my method for pouring a garage floor in 17 minutes. Enter Value: Dimension 1: Length Ft. Width Ft. Outdoor patios combine the best of interior comforts with Mother Nature's loveliness. Conversion calculators make it easy to convert inches to feet, yards to feet or meters to feet. New home with 2" thick concrete slab in basement. Determine the thickness of your intended slab. The 24 in. Calculators. Building Supplies. 4 inches of gravel, vapor barrier, 2 inch foam board, 2 inches of sand and then 4-6 inches of poured concrete with mesh rebar in it. I poured a 4" suspended slab, 4'x5', this summer and had a mixer + cement powder and navvy jack - still took 2 of use almost 3 hours and wasn't consistent with our mix. A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. You may freely link Start by choosing straight form boards. The floor vibrates when I stomp my feet in many of the cracked areas. 3/4 inch crushed stone: 37%. Casting a wire mesh in the concrete reduces the chance of cracking. Use #3 bars at 29 inches center to cen-ter in each direction, As = 0.046 square inches per foot. Plastic sheeting, roofing felt, or a bond-breaking compound is used to prevent bond to the base slab. The slab is poured thicker at the edges, to form an integral footing; reinforcing rods strengthen the thickened edge. Bonding adhesive question? I was wondering if anyone has tried grinding down that much concrete. For a 5-in.-thick slab with thickened edges, which is perfect for most garages and sheds, 2×12 boards work best. Step 3 Evenly spread 3 to 4 inches of QUIKRETE All Purpose Gravel and then level the gravel. Many home slab foundations, workshop foundations, and pads for RVs, boats and large construction workshops are designed to carry weight without cracking or crumbling under the pressure. 4 years ago. If you check your grade and one spot is 4", some spots are 4.5" to 5"-the best solution for both the job quality and your concrete budget is to fix the grade. 2- Slab-on-grade foundation. 7/8 inch crushed stone: 5%. If you are planning on mixing your own concrete, or if the slab will be a small one, you will need to purchase enough concrete mix to cover the entire area. A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete. suggestions. It would probably be longer with quickrete even though it is all pre-bagged, and will cost more too. Questions of a Do It Yourself nature should be If done properly, new concrete can often be poured right over an existing slab. Concrete Slab Design Procedure. The concrete slab in half of the area where we want to put travertine tile is 1/2 inch higher than the other portion (adjoining rooms, now combined rooms). Cubic Yards: Dimension 2: Length Ft. Width Ft. The ... New concrete slab over old existing slab. DoItYourself.com®, founded in 1995, is the leading independent Convert the volume to cubic yards from cubic feet. Here’s a brief rundown of what you need to know about concrete and concrete prices. 2 inches is far too thin. Hi, I am Mike Day, owner of Dayâs Concrete Floors, Inc. in Maine, where I've been working with concrete for 40 years now, and this website is where I can share with you all the knowledge and wisdom I've gained from installing all kinds of decorative concrete, concrete floors, concrete overlays, stained concrete and also fixing cracked or spalled concrete. A concrete joint should be a 1/4 of the thickness of the concrete slab. I believe this is a result of how the sump pump water had been routed from the previous owner and when I took away the water that always flowed under the basement foundation from the sump then the concrete slab settled the next spring and hasnt gotten any better or any worse? I have no experience with fencing, but my father-in-law does and is helping... Why Do You Need a Moisture Barrier Under Laminate Flooring? I have chiseled away at the edge, it has rocks mixed in the biggest being a little less than an inch. Excavate the slab area to a depth of about 7 inches, allowing 3 inches for a gravel base and 4 inches for concrete. problems contact webmaster@doityourself.com. The joints should be installed 2 to 3 times, in feet, based on the thickness of the concrete patio slab. Rebar is recommended on concrete measuring 5 – 6 inches thick. At an average cost of $6.17 per square foot for a 6" slab, here are the average prices by size: For light-duty slab, concrete topping material is similar to the slab concrete. All rights reserved. 1/4 inch crushed stone: 10%. Patio and sidewalk forms should slope evenly away from structures. Multiply the length (10 ft.) by the width (10 ft.) by the depth (.35 ft., or 4 in.) Step by step guide plus video repair tutorial, Click here to read our PRIVACY POLICY and our DISCLAIMER NOTICE. The thicker the material, the stronger it is. Remember that the more weight the slab will bear, the thicker the slab needs to be. That’s about $5,400, or between $3,600 and $7,200 for a typical 30- by 30-foot slab that’s 6 inches deep. The proposal is $48,000. Hence a concrete slab that is 4 inches thick should have a 1″ deep joint. 1.2 Materials . Multiply the thickness of the slab by the basic area. Drilling A 2 Inch Hole In Concrete Slab. If you liked this, please share. The garage was about 6 years old when this happened and the slab is still in tact and did not break up. Active 1 year, 1 month ago. This should provide a slab without cracks, but it’s not a guarantee. { concrete layer is 2 inches thick in some spots } Again, gotta love 100 year old homes! So depending on what the slab needs to support will determine the thickness and configuration of the concrete. Ft. width Ft is not required right depth, and gardening shed floors cubic foot forms for level ¼... Average cost to install a concrete Order 4 per cubic foot surface is prepared so that the weight! 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