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If you are looking for more details, kindly visit cut concrete angle grinder.
Whether you want to create a countertop or expand your sidewalk, cutting concrete yourself may not be as daunting as you imagine. Slicing through slabs thicker than six inches is best left to a pro, but anything less than six inches—a depth that would include most concrete walls, patios, and sidewalks—can be cut by a DIYer with the right equipment and proper know-how.
Any handy homeowner looking to cut concrete needs one crucial tool: a diamond blade. While abrasive blades can cut concrete, they wear out quickly, potentially needing to be replaced multiple times in the course of one project. Abrasive blades may lead you to “force” the saw, a dangerous move that could result in losing control of the saw and suffering a potentially life-threatening cut. Don’t take the risk; instead, invest between $30 and $55 for a diamond blade (view example on Amazon).
On the subject of safety, take note: All of the protective gear listed below is necessary. A filtration mask will keep you from breathing in concrete dust that can damage lung tissue, potentially causing lung cancer and silicosis. Kneepads and shin guards, on the other hand, will protect your legs from injury.
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The ground fault circuit interrupter (GFCI) protected extension cord will not only protect you from power surges, shocks, and overloads, but the waterproof exterior is designed to withstand dangers posed by rain and any other contact with water. Manufacturers recommend plugging it into the power source and then, if needed, plugging in an indoor/outdoor extension cord from there. (Though GFCI cords as long as regular extension cords can be triple the price, they’re worth it for anyone who routinely works outdoors.)
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Finally, if you’re doing a large project requiring more than seven feet of cutting, consider renting a “walk-behind” wet-cutting saw instead of using a diamond blade. Although it can be a pricey rental (around $100 a day, plus wear of blade, for a cutting depth of nearly seven inches) and heavy to work with, a wet-cutting saw will ensure the straightest and deepest of cuts, with far less work overall—no chiseling, no hammering, and no need for repeated shallow cuts. You pay for the machine and the extent of blade wear, measured in 1/1000ths of an inch and charged accordingly.
These instructions on how to cut concrete focus on smaller projects, which are completed with a diamond blade.
I have to cut a 100x500 mm hole in a concrete slab that is about 80-100 mm thick. I think that I have two options to do that:
1) 9" angle grinder with segmented diamond disc: cut the long sides, then chip away the short sides with chisel.
2) Hammer drill with with a large bit making holes close to each other and the just breaking it out with a chisel.
Option 1 is faster, but is more expensive (I also have to buy the disc besides the tool rent) and it looks kind of scary after I saw some kick back results.
Option 2 is cheaper (bits come with the tool rent), but seems to be more time consuming.
Both options will leave a rough finish that will demand for stucco or something.
PS: I can access the slab from the top and the bottom if it matters anything.
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