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  #31 (permalink)  
Old 03-13-2012, 11:10 PM
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Default Re: New Project for LACMA

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Originally Posted by rutager View Post
Is my mind serving me right in that they used to drill holes in some rocks and insert dry wood pegs and then get them wet; the swelling wood would then split the rock?
Yes, i remember reading that somewhere.
It would take a lot longer to get the work done,
(not to mention the fabrication of the pegs - )
Keep in mind that the working depth of my drill bit is eighteen inches.
Also the expansion ratio and speed of the Dexpan is probably much greater than the swelling ratio of the wooden pegs.


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  #32 (permalink)  
Old 03-14-2012, 02:58 AM
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Default Re: New Project for LACMA

Roger,

I bet it only works in stone that fractures easily. My memory is real foggy, but it didn't seem like it took too long to work. Probably would do nothing to many rocks; need the right kind. As for your project get some dynamite from Fred; he must have some, he has everything else!

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Rutager
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  #33 (permalink)  
Old 03-14-2012, 05:48 AM
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Default Re: New Project for LACMA

Rutager,

The stuff works great.
I was really surprised the first time I used it.
Give me an eight foot bit and I could could make gravel chunks out of that LACMA rock .

There is an art to drilling the holes.
If you had let's say a slab of concrete and you wanted to only demo half of it without sending fracture lines into the good half you would drill a grid of holes about 8 inches apart in the field you wanted to demo. About four inches from the border of the good half I would drill holes about four inches apart in a line. (not unlike a perforated sheet of paper) Those "perforated" holes you would NOT fill with the Dexpan, this then gives the slab a line to expand into and stop. I did that with a boulder that was under an existing foundation and it just sheared the boulder like I took a meat clever to it.

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  #34 (permalink)  
Old 03-14-2012, 10:04 AM
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Default Re: New Project for LACMA

Roger,

Sorry, I wasn't clear, I meant that the wood probably only works in easily fractured stone. The Dexpan sounds like some amazing stuff.

Best,
Rutager
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  #35 (permalink)  
Old 03-14-2012, 06:00 PM
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Default Re: New Project for LACMA

Then there are "feathers & wedges" that were traditionally used to split rock with a sledge hammer.

Feathers & Wedges (Pieces and Sets)

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  #36 (permalink)  
Old 04-22-2012, 11:35 PM
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Default Re: New Project for LACMA

We dropped by LACMA yesterday. The "big rock" project is coming right along. They're saying it may be finished by the end of May:









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  #37 (permalink)  
Old 04-23-2012, 03:45 AM
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Default Re: New Project for LACMA

I still think it would have looked better in my yard...

I wonder what they'll do with that flatbed, now that the rock's installed?
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  #38 (permalink)  
Old 04-23-2012, 05:58 AM
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Default Re: New Project for LACMA

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I wonder what they'll do with that flatbed, now that the rock's installed?
They'll add 3 floors to it and use it to move John's tools down the street.
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  #39 (permalink)  
Old 04-23-2012, 06:49 AM
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Default Re: New Project for LACMA

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Quote:
Originally Posted by Poto View Post
I wonder what they'll do with that flatbed, now that the rock's installed?
They'll add 3 floors to it and use it to move John's tools down the street.
So, that lowboy comes complete with its own generator?



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  #40 (permalink)  
Old 04-23-2012, 01:34 PM
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Default Re: New Project for LACMA

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So, that lowboy comes complete with its own generator?



That's just a small part of the original rig, I guess thay haven't had time to move it yet. :






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