What rotary hammer drill bit for breaking concrete?

[MamaFox]

I am planning on buying the following rotary hammer drill for the purpose of breaking up concrete leftover from my build, it's patchy and at most 1 inch thick but in two large areas of about 1m by 2m each. I am not strong enough to use a sledgehammer. 
Is any of the bits included with this suitable for this job or can you please tell me which bit to buy?

Ryobi 1500W SDS+ Rotary Hammer Drill RSDS1500-K

[Dave-1]

Evening @MamaFox 

I like your Oomph for the job Tho I have tried the same thing to break up much thicker piece of concrete pathway beside my house. I did a bunch of holes through the concrete and still it didnt break. I have used a wooden handled sledge hammer but ended going with a firbreglass handle and that made it a lot easier on my arms/wrists.

My best suggestion is actually to use a pound hammer IRWIN 3lb Club Hammer Think of it as a shorter sledge hammer, musch easier to sit on the ground and bash away. The pound hammer (just the name I know it as) has a rounded/poined side and a flat side. Both work but the rounded side puts more force into cracking the concrete. I have used it to break up the majority of my concrete for my gabion walls and by no means am I fit or strong.

One of the rock piles i have...

The "Pound hammer" This one is a trojan named brand from Bunnings and seriously a good tool, cheaper then the one I showed in the link. Same shape, same job I have been sitting there and "belting the concrete and rocks, sometimes placing them so they sit between two rocks so it is easier to break them up. 

NOTE Saftey specs are a MUST You will thank them for sure.

You could try it before investing in a machine plus tools to break up the concrete. However if you still dont feel up to the task I would suggest to hire an electric jackhammer for the smallish area you want to do. Cheaper and the machine is built to do that job. BTW the jackhammer will weigh more then a sledgehammer. 😕

Dave

[Noyade]

Morning @MamaFox 

Any chance of a photo of what we're dealing with?

If a small slab, like Dave I have had success with a crowbar, brick and a large hammer. Brick close to the edge, crowbar tip poked under the slab and levered against the brick, which acts as a fulcrum. The slab only needs to be a few centimetres up - and then hit close to the middle of the slab. And so on. They tend to break easily doing this, unless reinforced with steel.

Could be a two person job?

Just a thought.

Cheers!

[R4addZ]

Hi @MamaFox

If you buy that drill you can buy a chisel bit for it which will make breaking the concrete easier. See here....

https://www.bunnings.com.au/search/products?q=sds+chisel+bit

[Noyade]

Hi @R4addZ 

I could well be wrong - but I thought that Ryobi kit would come with the chisels?

Some time ago Bunnings used to sell the XU-1 branded demolition hammer for $199.

Possibly I'm living in the past? Ten times the punching power of the Ryobi.

But heavy.

Basic shape.

[MitchellMc]

Welcome to the Bunnings Workshop community @MamaFox. It's brilliant to have you join us, and many thanks for your question about the Ryobi rotary hammer drill.

The Ryobi 1500W SDS+ Rotary Hammer Drill RSDS1500-K comes with a range of chisel and drill bits that can be used for demolition. However, breaking apart slabs is not a job this style of drill is designed for. It's more designed for chiselling up tiles or breaking small amounts of concrete. As @Noyade has mentioned, a demo breaker would be more up to this task. However, they are quite heavy and require a bit of strength to control; they're like a jackhammer.

You could certainly use the rotary hammer drill, but it will be slow going.

Please let me know if you have any questions.

Mitchell