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Chockstone Forum - General Discussion

General Climbing Discussion

Author
demonstration of Blueys rock strength
mikllaw
26/01/2013
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
26/01/2013
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
26/01/2013
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
26/01/2013
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
26/01/2013
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
27/01/2013
10:11:32 AM
Bit further west.

pmonks
27/01/2013
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
27/01/2013
5:11:18 PM
Looks like a floor tile.
mikllaw
27/01/2013
10:59:05 PM
ceasarstone bench top

There are 9 messages in this topic.

 

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