Use a standard circular saw, equipped with a corundum or diamond blade, for small tasks. For slabs, it's best to cut through the top inch, then use a sledgehammer to break off the rest. The jagged edge left below the cutting line provides a good rough edge for the new concrete to bond to.
A wet saw with a diamond blade is highly recommended for a smoother and safer job. Position the blade against the slab and start following the marked areas. Take your time and go easy on the blade. Do not push the blade too hard, just guide the blade and let it do its job.
Use your dominant hand to grip the back handle and push the blade forward and backward. Begin cutting at the edge of the concrete and slowly follow the chalk line. Don't press the blade into the ground—let the weight of the blade and saw do the work. Remove the blade every 30 to 45 seconds to avoid overheating.
A circular saw is a common choice for cutting paving slabs among landscaping experts. When using these cutting tools, it is essential to wear safety glasses and a dust mask as they produce large dust clouds which can often leave behind a lot of residue.
A concrete chain saw contains diamond grit to give it the strength and durability required to cut tough surfaces. Concrete chain sawing is ideal for small openings or on odd shaped materials. This technique works on brick, block and concrete up to 25 inches thick.
Use a Hand-Held Saw to cut paving slabs:
In order to cut paving slabs using a hand-held saw, we recommend you use a circular saw and ensure to use a diamond masonry blade as this will be strong enough to saw through the paving slabs.
All standard cutting methods work for straight cuts, but for curved cuts, use a circular saw or angle grinder. Score the curved cut along the top of the paver first, cutting about 1/8 inch deep.
An angle grinder equipped with a concrete-cutting blade makes straight sharp-edged cuts in a concrete block's surface. An angle grinder's design enables it to cut small square holes in a concrete block; a useful trait when installing electrical outlets in a concrete block wall.
Diamond Grit TORCH Sawzall Reciprocating Saw Blade (48-00-1450) is intended for cutting brick, block, concrete and stone.
Use a standard circular saw, equipped with a corundum or diamond blade, for small tasks. For slabs, it's best to cut through the top inch, then use a sledgehammer to break off the rest. The jagged edge left below the cutting line provides a good rough edge for the new concrete to bond to.
One is its quality. According to experts, a low-quality diamond blade can only last around 12 hours of non-stop cutting, while high-quality blades can cut materials up to 120 hours. Another thing that can affect the blade's life is the material you are cutting.
Wet concrete is very difficult to cut, and fully cured concrete can fracture as it's being cut. So if possible, cut concrete when it's hard but only half cured. The cut will come out smoother with less dust.
They can cut through 12 to 14-inches of concrete. It is wise to use a strong power source for cut-off machines to increase their speed. They also become simpler to use and are less noisy. This is even more so if the main focus is on the depth of the cut as opposed to the noise created when in an enclosed environment.
Mark the places you want to cut on the concrete slab either using chalk line (good for long, straight edges) or chalk. Apply the line as thick as possible. You'll ideally run a trickle of water over the concrete as you cut in order to keep airborne dust at a minimum, and you don't want the line to disappear.
Paver stones are often cut with large concrete saws or miter saws, but they can be cut successfully with a simple circular saw. Rather than the circular saw standard blade used for cutting lumber, however, the circular saw needs to have a diamond masonry blade to cut through paver stones.
Begin cutting through the paver with the power saw, using the marked line as a guide. Once you've cut about 1cm through one side, turn the paver over and repeat the process on the other side. Continue until you have cut all the way through and then lay your newly carved paver into place.
To start with, place the chisel over your line mark and tap it with the hammer, moving right around the block to make a score line roughly 1/8” deep. At that point, return in where you scored and chisel again using sharp blows with the hammer. Then the block will break in two pieces, but with a jagged or rough edge.
Grab your hammer and chisel to cut the pavers. Hold the chisel just outside of the line you've drawn on the slab and tap gently but firmly with the hammer until the brick splits. Use the chisel to knock off any sharp, uneven edges and help you create a neat finish.
With a 14-inch circular blade on a cutoff saw, the maximum depth is about 5 inches.
Ring saws are cutting tools which are typically used to cut into concrete or for making cuts into brick walls for windows or doors, for example. They are particularly useful for confined spaces and for areas that are hard to reach.
STIHL TS 800 is the top-end petrol cut-off saw and comes with a cutting depth of 145mm. The saw benefits from the option of hand-held operation or use with the FW cart.