Crushing concrete

[6sunset6]

I need a crusher. I have hmm maybe 7 yards of concrete from a slab I picked up no wire in it but had fiber. Size ranges from 2" thick 6" x12" to 6" thick 2' x 4'
set over a couple of rails a sledge will crack them . I also have a small rotary jack hammer. I can use feathers and wedges or Dexpan ( better) to reduce the big ones .
I saw a great small crusher on you tube , the link started here . But It was 12k and needed a 16hp engine. Neither of which I have laying around. I do ,however have lots of time. I was thinking of a log spitter . The wedge is ok the pusher would need two projections the place the concrete piece in tension around the wedge. I tested the theory on a press with a pressure gage on it 4T to snap a 2" by 6" piece. With a bang I might add.
I have a small spitter around 9 tons. Thats the next step. I also have something in the 25 ton range but it has a box wedge on it and I would have to make a new wedge for it . Only if I have to. Will keep you posted. I bet a vertical machine would work great for this with projections on the base. And one could sit while doing it.

 

[Walkin Horse]

I have the same thing golng on. The hunt club I belong to has 2 dump truck loads of rubble someone brought in to fix the mudholes. Everybody was too lazy to do it right and was just chucking the sections in the mudholes. The trucks were getting hung up and pushing the pieces out of the holes. So the president told me I could have all I want. They are about a mile from my place so I go get a truckload. Come back toss it off and use a hammerdrill to bust it up. It takes me about two hour to bust a dually load. And it is more or less where I want it so I don't have to handle again. Let us know how the splitter works.

 

[quicksandfarmer]

Around here crushed concrete sells for about $10/ton. Seven yards is about 10 tons, so you've got about $100 worth of finished product. I'd give the pieces of slab to the recycler and buy it back crushed.

 

[Bigfoot62]

Around here crushed concrete sells for about $10/ton. Seven yards is about 10 tons, so you've got about $100 worth of finished product. I'd give the pieces of slab to the recycler and buy it back crushed.

That's what I was thinking.

 

[Gary Fowler]

I would love to find someone with a portable crusher. I removed 6 slabs 18" wide x 40 feet long with average thickness about 12" thick for my daughter in law. The previous owner had a triple wide mobile home on it. It does have some rebar in it. We were thinking of using a rented jack hammer to bust it into some smaller pieces to use for rip-rap in creek wash areas but crushed concrete would be nice for the driveway.

 

[RDrancher]

That's what I was thinking.

Me too. I guess what I'm not understanding is why the OP would go to the trouble of building a purpose built machine to crush 7 yards. Bored?

 

[Brad_Blazer]

I made a 2" tamper head for my little 40lb electric hammer that seems to do a good job crushing rocks and concrete. Maybe a bushing tool would work well after you reduce it to manageable chunks with a chisel bit.
I haven't done any big jobs. Just crushed the occasional rock or cement from a post. Search Results for bushing tool at The Home Depot

 

[lt190b]

pick up big piece drop on small piece make smaller pieces

 

[6sunset6]

Amazing Log Splitter pops concrete easy. Easier with some projections on the pusher flat. Did not even go into low gear and the broken pieces did not fly around much. Then the projections broke off and I tried with the flat pusher. Maybe pump shifted , more energy in the split and the pieces flew a bit . It broke 2" thick standing up as well as 2" thick laying down with 4" the long way . I supose 2 x 4 is the same as 4 x 2 . I have to make a better way to keep the rebar verticals in there , Maybe a loop around the cross pin. I do have pictures but I can tell you guys want movies. I can do that but let me get the cage fixed first. ]
Now that I look at the picture I realize that I could just weld the rebar on the flat. it would still work as a splitter. Except I cannot get the splitter to the welder right now. Waiting for a guy to place 11cy concrete no show today.

 

[Diamondpilot]

Around here crushed concrete sells for about $10/ton. Seven yards is about 10 tons, so you've got about $100 worth of finished product. I'd give the pieces of slab to the recycler and buy it back crushed.

I agree. It's too cheap to mess with. Same with recycled asphalt.

Chris