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General Climbing Discussion

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demonstration of Blueys rock strength

mikllaw

26-Jan-2013
8:15:56 PM

I'm building a retaining wall and made it about 70 mm too high:

No problems, the tops of the Sydney sandstone blocks disappeared with 2 hammer blows each with a cold chisel.

. I also have a rock I found on the road in the Grampians which took about half an hour. I cut a 20mm deep groove with a diamond saw and the put in cold chisels and pounded on them with a sledge hammer, no effect. I started drilling holes with an SDS bit which lasted about 20 seconds:-

I eventually made a mesh of crossing diamond saw cuts and hammered the top into razor-sharp shards. The grampians rock must be 50 times stronger.

kuu

26-Jan-2013
8:30:39 PM

So the Blue Mountains need to undergo metamorphosis (heating and/or application of pressure).

It might be a bit uncomfortable for us during this process! ;-)

mikllaw

26-Jan-2013
8:44:50 PM

yes, I think the geos call it induration.
Nowra rock is pretty much the same as blueys rock except that it's deepr, and therefore older

salty crag

26-Jan-2013
9:39:59 PM

70mm too high?? Looks about 3m too low! Build it higher and you can boulder in your back yard.
On rock hardness a buddy and I are bolting a few sport climbs on our local sea cliffs. Steep overhung walls of Basalt are hard work.

mikllaw

26-Jan-2013
11:06:50 PM

On 26/01/2013 salty crag wrote:
>70mm too high?? Looks about 3m too low! Build it higher and you can boulder
>in your back yard.
>On rock hardness a buddy and I are bolting a few sport climbs on our local
>sea cliffs. Steep overhung walls of Basalt are hard work.

near warnambool?

salty crag

27-Jan-2013
10:11:32 AM

Bit further west.

pmonks

27-Jan-2013
3:57:25 PM

On 26/01/2013 mikllaw wrote:
>. I also have a rock I found on the road in the Grampians which took about
>half an hour. I cut a 20mm deep groove with a diamond saw and the put in
>cold chisels and pounded on them with a sledge hammer, no effect. I started
>drilling holes with an SDS bit which lasted about 20 seconds:-
>

That's unlike any Grampians rock I've ever seen - where did you get it from?? Almost looks like granite!

nmonteith

27-Jan-2013
5:11:18 PM

Looks like a floor tile.

mikllaw

27-Jan-2013
10:59:05 PM

ceasarstone bench top

There are 9 messages in this topic.