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Concrete cutting saw blades
(pretending to be Kenny) What's this composite blade ya'll are talkin' 'bout?
KW, purty soon yous gonna be a contractor yerself! Next thing we know we'll be comin' to you for info. And that's a good thing!
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Concrete cutting saw blades
I use regular diamond blades. I'm not overly concerned about using them wet or dry as I don't always have a water supply---sometimes the tailings mud they make is worse than the dust the create.
I prefer a customer who, like you, has been in the trenches and appreciates hard work. But then I shudder when I go to do an estimate for someone that hasn't done any actual work but knows everything because they either read on the web, a neighbor told them, or a drunk brother-in-law told them---or, has been my luck they are mechanical or software engineers with no practical application exp. Clients--esp. educated ones, don't like to be told they are just plain wrong. My last client had me waste a whole day redoing what I told him was not going to work. Now he actually wants solicits my opinion AHEAD of time because everytime he wants something done I tell him, "You're the engineer" He don't wanna hear that 
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Concrete cutting saw blades
Ahhh---the composite abrasive blades. Their "super-fast" cutting oddly wasn't in the context of concrete cutting I noticed. I do know first-hand they can really tear up flesh lickety split! I use them for cutting steel when I have to.
Speaking of cutting steel, I usually rail against Clarke tools sold at TSC. Well I will have to make an exception to that: I bought one of their "metal cutting circular saws" for about $139. The box it came in said it would cut 5 times faster than an abrasive blade--and they ain't kidding. I cut a 40' ocean-going shipping container in half in under 45 minutes including cutting the hardwood floor and cross members. It cuts Cor-Ten steel like it was butter. It doesn't like material thicker than 3/8" as it chips the teeth off. New blades are $30.
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Concrete cutting saw blades
Dang! I thought I would be able to s-l-i-d-e that engineer thing by you!
Factor of 3 isn't too bad---I usually figure about 2.
Does your total time include spending time on TP?
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Concrete cutting saw blades
Kenny, are the abrasive blades worthless? Depends on who you talk to I suppose. I have a bunch I keep on hand just in case I wipe out an expensive diamond blade. Ten years ago a good 16" diamond blade was upwards of $600 or more. Now you can buy a cheapy for about $50-$125 on eBay. I did buy two gently used high-quality ones for $35 each off eBay and am still using them. The cheap ones are good for about 5 hours while the good ones are about 3-10 times that or more. Abrasives are about $6-15 each---but you can't consistently cut at depth as it is continually wearing out. You might start out cutting 4" deep at one of a 3-4 foot long cut and end up at zero depth.
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Concrete cutting saw blades
Kenny: Bolt cutters or a rebar cutter is much quicker and quieter.
Murf: Did I read your post right about using abrasive blades wet? Unless I was using the wrong kind, I tried water and it took just as long if not longer.
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