When a slab is being poured and the mud is being pushed and prodded into place, standard welded-wire mesh often is trampled to the bottom of the concrete layer. The three main operations carried out in rebaring for reinforced concrete construction bars are cutting, ... Rebar cutting shear is a cutter used to cut the stirrups at the equal size in a huge amount. Since the concrete will be quite strong even one to four hours after curing, we recommend a premium diamond blade for a wet saw. Dry saws can be used within one to four hours – we recommend a hard aggregate blade. Because rebar is made of high strength steel, cutting rebar requires special tools. Oftentimes, concrete cutting involves more than one activity, which means that the different activities that need to be performed will demand varying charges. I calculated needing 7 yards of concrete and 500 feet of rebar. He recommended cutting 1 foot off to make square then digging down 30 inches with it narrowing to 8 inches at the bootom. If the mesh isn’t cast into the center of the slab’s thickness, it loses its ability to reinforce the concrete. Before you decide to tear up a concrete slab, it is a good idea to know where the rebar is. I have the situation that some 8cm holes (16 in total) have to be drilled in a concrete floor slab containing rebars. Does anyone have an idea on how this might influence the strength of the slab? It all depends on the size of the slab and whether the slab is on grade. You must be concerned with the concrete slab thickness and you should be. The concrete is reinforced with steel rebar, steel mesh, or post-tension cabling. It is easier to work with than rebar due to its flexibility. Imagine you have to test whether your muscles or bones are intact in your thighs, do you core cut it through the bones and flesh, test out the muscle integrity?? Other reasons for rebar in concrete. A 4-inch-thick slab cast on the ground and in permanent contact with it will float and rebar is not required. The slab for the stoop will be re-poured with a joint between it and the exterior slab. Factors such as concrete mix, weather conditions, hardness of concrete and types of machines used for making the control joints determine when to cut the concrete slab. Cutting rebar with a cutoff saw part one - Duration: 0 ... How To Form, Pour, And Stamp A Concrete Patio Slab - Duration: 27:12. Cutting or drilling through these materials can cause damage to your equipment, compromise the tensile strength of the entire concrete slab, and even risk total structural failure. 08-17-2018, 09:06 AM #7. cyanidekid. Equipment Used for Bending of Reinforcement Bars 1. Also rebar embedded into the existing slab 1 ft oc around perimeter that turned 90 degrees and down the footer. Saw Cutting Helix ® Micro Rebar ™ Concrete. It’s a story that’s all too familiar: A hole gets dug, a foundation gets built and there’s a hasty backfill before the asphalt driveway gets installed. We’ll use a 10 x 10 ft. slab as an example: Calculate the volume you need in cubic yards. Drilling through concrete is tough to begin with, but when your masonry drill bit encounters a piece of rebar the project comes to a screeching halt. You should make sure that your concrete cutting services should be equipped with all the right tools. How To Cut? Find Reinforced Concrete Cutting Blade Products. Rebars are usually steel rods running through concrete slabs that help reinforce their strength. For slabs reinforced with rebar or wire mesh, this is considered fairly routine. A concrete slab reinforced with rebar or welded wire fabric should have a minimum 1 1/2 inches of clear cover between the reinforcing and the top of the slab. The information below will show you how to reinforce concrete using steel mesh. 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