If you're using concrete to make a sidewalk, the shrinking concrete will cause cracks to appear as it dries. To prevent sidewalks from cracking in random spots and breaking apart, builders make lines in sidewalks. Of course, they don't just call them lines. The technical term for sidewalk lines is contraction joints.
Can you use a tile saw to cut concrete pavers?
You can cut pavers by hand (with a hammer and chisel), with a guillotine paver-splitter, or using a wet-saw with a diamond-tipped blade. But it's not very fast — each cut takes at least 20 seconds. And it's not portable, so you have to run back and forth between your patio and the saw.
How long do diamond saw blades last?
A low quality diamond blade under perfect conditions can last around 12 hours, but with improper technique or the wrong materials, this could be reduced by half or more. On the other hand, some high quality diamond blades under standard working conditions have been known to have a life of over 120 cutting hours.