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Dexpan V Granite

  • 26-02-2016 3:21am
    #1
    marcusluck
    Registered Users, Registered Users 2 Posts: 66 ✭✭


    Thinking of using DEXPAN to break granite rock,( that's exposed and has veins in the Rock maybe weak points )
    The culprit rock to the bottom left holds back water in a field .
    I will be unable to drain it any other way there is a major fall to the left of the picture where im standing once I remove that rock away naturally flow that direction,not able to afford a rock breaker! if I could use this expanding product heard maybe I can use that as a filler not sure what to do, throwing out the question have a picture take a look.


Comments

  • #2
    AngryHippie
    Registered Users, Registered Users 2 Posts: 2,625 ✭✭✭AngryHippie


    marcusluck wrote: »
    in a field .

    That's a fairly loose definition of field there.

    Granite is fairly tough stuff. (Can be up to 5-10 times harder than concrete, 200MPa for fresh rock) No easy way to remove it.
    You'll wear out picks and drill bits trying to break it or drill it. Extreme heat may crack it....

    Other than that your looking at an excavator and breaker and even then it'll be slow going.


  • #3
    Safehands
    Registered Users, Registered Users 2 Posts: 1,360 ✭✭✭Safehands


    AngryHippie wrote: »
    That's a fairly loose definition of field there.

    Granite is fairly tough stuff. (Can be up to 5-10 times harder than concrete, 200MPa for fresh rock) No easy way to remove it.
    You'll wear out picks and drill bits trying to break it or drill it. Extreme heat may crack it....

    Other than that your looking at an excavator and breaker and even then it'll be slow going.

    You can break it with chemical rock splitters. You need a free edge, but I've seen it done successfully. Drill a series of 30 to 40mm holes, pour in the rock splitter and wait about 12 hours. It will be split and easy to remove.


  • #4
    marcusluck
    Registered Users, Registered Users 2 Posts: 66 ✭✭marcusluck


    Thanks on feed back 👌,i done some digging around the rock maybe i don't need any expanding grout but some old fashioned work ie sledging. . Thinking breaking out a channel in the mother rock with chisels and wedges ive no experience with sort of work i suppose it dont have to be pretty even for a drain. .the pictures with the x's where i have to go down 1n half 2 foot.. another shows the amout of water being held back


  • #5
    Safehands
    Registered Users, Registered Users 2 Posts: 1,360 ✭✭✭Safehands


    marcusluck wrote: »
    Thanks on feed back 👌,i done some digging around the rock maybe i don't need any expanding grout but some old fashioned work ie sledging. . Thinking breaking out a channel in the mother rock with chisels and wedges ive no experience with sort of work i suppose it dont have to be pretty even for a drain. .the pictures with the x's where i have to go down 1n half 2 foot.. another shows the amout of water being held back

    These are very flat granite rocks, with no real free edges. The only way you could use a chemical rock splitter is if you were to use a con saw to cut chases in the rock, before drilling the holes. This type of material works by expanding against the side of the holes and cracking the rock outwards. If there is no joint or free edge for the rock to expand to then it won't work. The trouble you have is that granite can be extremely tough. Even mechanical rock breakers can have difficulty breaking it.
    I hope this makes sense to you.


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