Breaking very hard rock with Chemical Cracking Agent
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- Опубликовано: 21 авг 2021
- Moving very large and heavy rocks presents a problem when access for large machinery is not available, one way around this problem is to break the rock down into smaller pieces. In this instance Dave chose to break up the rock with and Expanding Chemical Cracking Agent. See exactly how it is done.
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Thanks for playing that piece of music during the time lapsed vision... Makes me neigbours think i'm a cultured bugger!
You know they like your music when they throw rocks through your window so that they can hear it better!
@@demolitiondavedrillandblast nice dave lol
Very nice time lapse! Reminded me of the old nature shows with flowers opening in the spring.
Thank you very much! I might have to do some video like that now that Spring is coming.
Thank you for this! This reminds me of good old RUclips, when interesting people uploaded interesting stuff just to share it with the world. Now it's all about the views.
Glad you enjoyed it, plenty of other interesting video on the channel.
Great video Dave
I like that you explain exactly what you’re doing.
Not only a demolition expert but a camera man of par excellence.
Thanks 👍 More video coming later this week if I get the time.
Name pls this chimical?
This method has been used for decades in the Midwest USA. We use the cheaper but slower method of filling the holes with plain water and letting the frost break the rocks. You have to keep filling the holes all winter
Does not get cold enough here for that.
There's an ancient Japanese technique I heard about. They would drive snug wooden dowels into the holes and then soak them with water, swelling the wood fibers and cracking out enormous chunks of rock from mountain sides
Can you tell me name of chemical?
A keen observation by Dave, " It is pretty easy to make friends when you live in a rocky area.". I expect so. Now, if they just pay the bill. The music for the time lapse photography was synchronized nicely with the cracking of the rock. Although no dramatic rock size reduction in this video, still a good video, and good to see Dave again, doing what he does best.
Dave, I was going to say pretty much exactly this, but I am lazy tonight, so, Ditto! Lol
Hey Dave. Great job (as always!). Bet those rocks never expected so much indigestion from that Vegemite soup you fed them! haha. No sudden loud noises - no sirens - just quiet destruction! See you next time. Take Care, Jim
Thanks Jim.
Wow, that was a lot slower than I expected but pretty cool how it just pushes it part.
It is a silent achiever Gerbill.
Great time-lapse, Dave! During my 40+ years as a welder I occasionally did some pipefitting, mostly commercial warehouses. With 3" inch gas supply(screw pipe) and under we used a product called "Expando" It was a black powder then mixed w/water. Care had to be taken, same as you do. Plus, timing and viscosity were critical, too dry and the pipe would freeze before fully seated and too viscus the pipe could crack from product expansion. Your take-off's must be correct too because there was no taking apart once dry. It also made great gasket material, especially helpful for heat-warped heads. Thanks again, Dave
Very interesting john, I have never heard of that one.
Great time lapse sequence, Dave. What pressure must have been generated in the expansion during a chemical reaction. This old Industrial Chemist is in awe.
Huge Pressure Alan, if you would like to know what is in it - Calcium dihydroxide ≥75 - ≤90 1305-62-0 Silicon dioxide ≥5 - ≤10 7631-86-9 Sodium Carbonate ≥1 - ≤3 497-19-8
@@demolitiondavedrillandblast , these substances might be in it after it has expanded. wikipedia lists the main components of non-explosive demolition agents as calcium oxide and portland cement. calcium dihydroxide is a fancy name for common builder's slaked lime, which calcium oxide converts to when mixed with water, generating heat and expansion pressure. silicon dioxide is a high tech name for sand.
@@demolitiondavedrillandblast Saw a man just like you in the Expando page. Says pressures of up to 14000 psi generated. That's a lot!
@Alan Moffat, Yeah... that's me, I've used lots lots and lots of Expando.
@vsv nrg Yeah, You must be correct, I did notice that the name did not quite sound right. I can tell you though that it is still a very nasty irritant after it has done it's work and converted.
They say that when the Aswan dam was built you could not get an ice cube in Egypt. Ice water is a brilliant idea. Thanks Dave
A lovely slice of your work again Mr D -thank you for taking the time and to share with us-much appreciated ♥️😀x
My pleasure
Cracking job Dave!
Thanks Dave!
Thanks for the video Dave! Fascinating to watch the cracking goo do it's work over time.
Glad you enjoyed it Erik.
The music was perfect with the time lapse. And your explanation was good too. The pace of the whole video was a nice change. not that I don't enjoy your go bang vids. Thank You Dave.
Thanks for your kind words Geoffrey.
Thanks Dave i must be impatient! My thought was that it would be smashed up by the next morning. The time lapse is fantastic.
It would have been if it were summer time here and the rock was warm.
Awesome, my grand father was a stone mason who did a lot of the stone work at the Jenolan caves west of Katoomba. His trick was in winter time pour water into holes and cracks in the rock and let the water expanding as it turned into ice break the rock.
Pretty sure that's how this stuff works but instead of freezing it just solidifies like resin
That is amazing Peter, I went thought there as a little kid in 1972 and remember seeing all of the drill marks in the vertical sides of some of the walk ways where the rock had been busted out!
That was very interesting, I've never heard of this method for breaking large rocks. Thanks for the info.
Glad it was helpful Mark, it is amazing stuff.
Once you have the air compressors there, might as well just jackhammer the damn thing.
@@BigKeithDog and destroy your arms for a week.
Maybe I’m just watching the wrong videos, but RUclips fed me ads for similar products a few months ago.
@@BigKeithDog easier to jackhammer a few holes and let the goo do the work than to jackhammer the whole thing.
I really enjoy your tremendous personality and the job you do,we’re grateful to have you in our lives!
I appreciate that Scott.
I'm going to have to modify my standard comment...."That broke up real good". Nicely done....slow and steady pressure eventually wins the day.
Thanks TC, I'll have to do another in the summer time when it works overnight reliably.
That was like some kinda weird flower!!!! Awesomeness, amazing what we can do with some powder and water!!
Sure is.
Puts me in a morning mood to break some rocks!
Love your videos! I'm learning a lot, thank you for making them! Have a great day, Demolition Dave!
Glad you like them, don't forget to hit the like and subscribe!
That boulder just got ROCKED!
This is awesome, thanks for time lapsing it!
My pleasure! Glad you enjoyed it Kelly.
Something about the relaxing music and the time lapse destruction of a giant ass rock, was super calming.....
Glad you like it Eric.
That was very very cool to watch , amazing seeing rock as hard as that being broken apart so quickly by chemistry that doesn't go boom .
Cheers for the pastoral soundtrack , now I have to watch soylent green again .
Why Soylent Green?
Breaking rocks up one crack at a time. Nice time laps.
You got that right! Cracking the world, one rock at a time.
Fantastic product Dave did a perfect job the music made me think of the old abc radio program Blue Hills
Hi Kerry, the tune is stuck in my head from when I was little - Ansett Airlines Australia - "Flight" Commercial - 1970 - ruclips.net/video/bceOzmOXVG0/видео.html
Brilliant! Each shot I didn't know where to look as I tried to guess which bit would go next, great music to go with it as well, loved it.
Thanks for watching Stewart.
Well done as always Dave!!
Thanks for the visit.
I had no idea that chemical cracking agents existed. I have heard of people in cold climates using the expansion of ice to break rocks. Same principle but maybe less reliable, more time spent. Cheers from the NW USA.
Been around for quite a while Eric. The popular brand in your country is Dexpan
Wonderful. Loved the time lapse and the change of camera view as it went.
Two cameras HS.
Great video again, Dave; and I LOVE the time-lapse music !
Glad you enjoyed it Ian.
Would have thought the process would be faster. But as you say it’s cool and the reaction is slowed.
Thanks buddy, cracking good job
It's slow but does the job.
Nice vid Dave.
I've seen it used on concrete where I worked before retirement. It works well.
Sure does Clint, concrete is a s soft as cheese compared to this stuff.
Well done! Thanks for the video - fascinating!
Hi Dave! This is a fun way to start a week!
I think so too! More coming later in the week Jim.
Awesome timelapse dave!
Thanks!
Used to use this down the pit making the start of a new tunnel part way up an existing shaft. Couldn't use explosives as shaft was in use at the time. The only time we ever had a blowout it was all over an inspector of mines and quarries - let's just say he was neither impressed or amused. Great stuff and excellent video
Lucky he did not get an eyeful of the stuff!
@@demolitiondavedrillandblast
hehe ... I know we got a right 'earful' from him ! Carried on though, once he'd 'laid down the law and left ... and we got the job done.
I've never heard of this but it makes a lot of sense. Using internal pressure to break boulders.
The best kept secret about breaking rock is that the tensile strength is only about 10% of the compressive strength, so if you can get a hole in it and work from the inside you have a chance.
Another great video. We use one in the States called Dexpan. It's also quite expensive. I'd guess it's the same chemical make-up as it seems to behave the same as your product. You also have to be careful with Dexpan temperature-wise and safety-wise or it will bite you.
Very similar stuff my friend, there are numerous different brands, would not be surprised if it all comes out of the same factory in China.
I was nervously awaiting for that last one to crack. Thankfully it gave way.
It did all crack in the end Alex.
I subbed. Nice video. Boy that took a long time to break up. I am much more of a feathers and wedges type guy.
Thanks for the sub Mark, You will find more than a few feathers and wedges videos on my channel.
Excellent choice of music
Thanks Richard.
I was confused by the cold-weather slowness; then I remembered it's winter in the Down Underworld.
Sure is TJ
a good way to do it if you cant use the noisy stuff.thanks for the video Dave.
No problem 👍 Thanks for watching Bruce.
This one of your best 'Goo' splits ever...Thanks for the interesting video. :-)
Glad you enjoyed it KT
That was a satisfying time lapse!
Yes it was! I would like to make more of these, e.g. I have 190Kg of cracking goo loaded in rocks just now that are cracking up nicely, I would love to have done a time lapse of this one but the site is not secure and the cameras would disappear for sure.
@@demolitiondavedrillandblast oh yea, I completely understand! I used to have a piece of property that I had the same issue while building a house on it. I lost my good game camera there.
Those stones had carvings.. Are you crazy?..They were priceless.
Sorry... wrong.
Really good video, thanks for making the effort.
Glad you enjoyed it! Another one coming later today!
If you are trapped in Australia and need to find a way out, blink three times on your next video.
Hahhahaha... very good Ryan!
Dave, I'll be your friend, and I don't even need any rocks removed.
Your a champion!
9👍's up demolition Dave
Thanks for watching Scott.
Patience rewarded -- slowly but surely.
,,,much too quiet, good one, keep safe..my mother in laws cake mix could be used for that,...lol...
Hmmm.... Your a dead man walking Bob.
@@demolitiondavedrillandblast ...not me, but i am worried about my dog. he was the only one, to chew on a chunk...lol..
Hi mate, what drill do you use for the holes. I live in Mareeba and have to crack them but can’t find a drill to suit. Thanks Simon.
Totally different and well done!
Thanks for watching.
I had to watch this with the volume muted (where I am working tonight) and it was still entertaining
Big chunks! That expanding stuff is a great tool to have - time lapse was very effective - sort of chemical plugs-n-feathers. I forget my classical music a bit but - hmmm - Sebalius 'Finlandia" perhaps.
This music was Morning Mood by Grieg, Thanks for watching Chris.
most of the time when you here that music is for flowers flowering or babys being born but oh no you have used that classical peace of music for destruction , lol well done dave , thanks for the great vid.
Thanks Paul.
My back hurts just watching you.
Mine is fine, drilled nearly all day today!
Dave, first thing good video 👍
2nd thing, you need a new, slightly larger bucket 😉
3rd thing, I don't think you needed to slow down the reaction by cooling the water, but probably better safe than sorry.
Amazing that you can compress a week into about 10 minutes 👍👍
Thanks for the tips! It was not a week but looked like it because you saw every day twice - Two cameras.
Dave, have you thought about trying a PAPR (Powered Air-Purifying Respirator) instead of your normal full-face respirator? It might be more comfortable for your long drilling jobs because the work of breathing is lower - I.e. your lungs aren’t having to suck air through the filter.
Mmmmm.... yes, that might be helpful, I have used supplied air respirators (bottle fed) in confined spaces and yes they are a bit easier to breath when you are working hard, good idea 013.
fascinating process! what is the material composition? btw….nice choice of music…
Mostly quick lime JW.
The ice was saved to cool the beer!
Your speaking my language TOM.
The Coral Castle builder Edward Leedskalnin used old leaf springs to quarry coral rock in large slabs ..
Amazing breaking the rock
oh darn….I was hoping to see 50lbs of “expanding chemical” expand in a millisecond…🤣🤣
Next week JW....
You must have told it a threat joke. That rock was cracking up alright. Lol!
That stuff just cracks me up!
Nice work!!! What is the name of the mix? Back in the early '90s I did the same thing you were doing with a mix called liquid Dynamite
There are many similar products, Expando, Ecobust, Dexpan etc.
Pretty remarkable, indeed! The time lapse was too right, liked the Greig, as well.
Thanks for watching MLP
Aww, those were nice garden rocks. I'd love to have rocks that big at my house, all the nice ones are buried deep out in my field and digging them up to bring over with my tractor is a lot of work.
When I read chemical crakingi thought you were making nitroglycerin. Lol!
No sir, won't be trying to make that stuff.
“it’s 20 past 11 in the morning, and all my holes are successfully filled”
…there are just…too many jokes there 🤣
Love it DemoDave for the win.
Thanks for watching.
Is it notoxi.waths it do too the under grown water down the road.
Fantastic! Just did my first rock with Dexpan. Lots of work, Hours and hours of drilling. After two days not a single crack. I was defeated. After a weeks time, went back to the rock and it’s all busted. Sooooo satisfying. Curios, do you use a rotary hammer drill? Looks like you were practically sitting on it. I could never find the right amount of pressure when drilling the holes.
Nice work 94, I use an air powered rock drill - much more power than any electric drill. My holes are 38mm diameter (Inch and a half)
looks like there were lines on the rock from ages past.
very interesting to watch the rock succumb to the chemicals.
Where I live, it is sand, and down about 300-500 feet until there is rock.
Sweet as video, Bro.
Appreciate it Dougall, thanks for watching.
You are the best!!!👍👍👍
Wow, thanks!
Dave can this chemical work in tight spaces eg. a concrete mixer?
Yes, for sure. You could easily split the barrel though.
Wonderful, Thanks
What is the name of the chemical that you used, I have several rocks in my yard that are very large and this would be very helpful in removing those rocks
There are numerous products that are similar MW, The most common one in the US is Dexpan.
@@demolitiondavedrillandblast thanks i will look it up.
Nice glacial rock. Hard to imagine Australia having glaciers, I suppose there must have been at some ancient time.
Australia used to be connected to california millions of years ago.
@@paulveitch That was before Nancy Pelosi, back when Australia trusted folks in San Francisco to mint coins of the realm.
Any idea if the rest of that massive statue that the single piece at 1:00 comes from is located anywhere near there?
Pretty awesome!!👍🏼👍🏼
Thanks for the visit.
That’s awesome, thanks for that, that’s stuffs insane
You bet Goz, the pressure generated in those holes is HUGE!
So what would happen if you filled the holes with water and allowed it to freezed during the winter time ? Wouldnt it crack the rock from the frost ?
Great video. May I know What chemical you have used?
I used Expando - expando.com.au/
@@demolitiondavedrillandblast thank you. 👍😊
Great time lapse . because you can :) nice soundtrack also .
Thanks 👍
would it do better if aluminum silicate sulfur - Portland cement ( quick set - high strength ) was used to top off the holes ( like a plug)?
No need, the stuff hardens before it starts expanding, only the smallest amount expands out the top of the holes.
What do you to to mitigate vibration white finger?
Cost wise, how does this compare with using explosives?
1/ Don't smoke, this helps ruin your circulation, 2/ add extra thick soft rubber padding on the handles and use thick gloves. 3/ Avoid short stroke, high frequency drills.
@@demolitiondavedrillandblast
I must be susceptible, I’ve used longer throw and short throw road breakers, sanding machines, HDS drills and oscillating tools and they all gave me numbness and tingling very quickly, that lasted for hours if not overnight. I avoid them these days if I can possibly help it.
Thanks so much for the video! Two questions though:
What tools did you need to drill the hole and how deep did you need to drill?
What's the name of the chemicals used?
You need a pneumatic rock drill and a huge air compressor to run it, the hole need to be 2/3 of the depth of the rock. The chemical is Expando.
This has me wondering how well this breaking method would work for a controlled demolition of a concrete building.
Yes, done that. Very difficult drilling through all of the 32mm bars though.
@@demolitiondavedrillandblast I figured the rebar would be the sticking point.
So do you sell or dump the granite afterwards?
Bit of both Jane, often it gets used on the site or elsewhere.
Why not use shims/feather and wedges. What are the pros and cons?
I did consider this option Nicholas, I have feather and wedges to suit the following hole sizes - 14mm - not a chance. 35mm - yeah but I only have 5 units and this would be abusing them on a rock this size. 48mm - no problem... but drilling 48mm holes in this rock with a hand drill is torture, the hole that I drilled were ~36- 37mm ish and that was hard enough. Also the time lapse of the cracking agent makes for better video. Thanks for watching and contributing.
@@demolitiondavedrillandblast, Thank you for the insight. Great video. Thanks for putting it together.
The drilling part is the toughest. Hard to not melt bits, even when lubricated with water.
Yes, this rock is really really hard stuff.
... and what product is it that you have used?
The product I'm using is "Expando" expando.com.au/ there are many similar products sold under different names, Dexpan is probably the most common.