Using Explosives to clean out a concrete truck
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- เผยแพร่เมื่อ 15 พ.ค. 2021
- Myth Busters said It couldn't be done! Removing a load of set concrete from a concrete truck agitator bowl is a very difficult and time consuming exercise. The traditional method involves working from the inside with a jack hammer and painstakingly chipping it out. In this case we had a small diameter skid mounted mixer and the very limited space inside meant that a full size jackhammer just would not fit, the only option was a small hand held air pick. To compound the issue it was a special mix of very hard concrete with very tough fibre aggregate. Luckily, the guys who took on this job knew exactly who to call for a fast and cost effective solution using explosives, Demolition Dave was able to get the job off to a good start with a conservative but effective blast that lessened a considerable amount of material, opening up significantly more room to move and work inside, without any damage to the machine.
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Was expecting to turn into a giant Christmas tree star ... but didnt.
Best comment.
You had me at explosives….
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@@demolitiondavedrillandblast oh I did don’t you worry :D
those shots from the inside were fantastic
My little DJI Osmo Action Cam does not agree... Thanks for watching ZX.
Yea seriously tho loved it
Sorry for the camera lose but the view was impressive .
The positive effects of explosives , what lead the concrete outfit to you ? Hope you had a helper or two to dig out the rubble for you !
@@heartland96a just rotate the drum and most of the rubble would probably get out.
i was going to ask what the fibre was, but waited until the end and you told us.
.
another great result Dave.
Indeed, thanks for joining in Amanda.
Me too, I was wondering if concrete was made of mud and straw in Australia...
Amanda Gardner, Yeah that fiber is why they couldn't just jack hammer it out. Maybe if they would have got to it in the first 12 hours or so.
@@tomruth9487 Yeah whoever did that likely did it on purpose.
@@SilvaDreams , Ah good point. I didn't think of that.
Me:" It's never fun cleaning up someone else's mess". Dave: "let's blast it!" Me: "okay, maybe a little fun". Lol
When the dust enveloped the camera on the first shot, I could smell the concrete dust. Well done Dave.
@D J Down tiger.
Did ya get it all out, nothing worse than your nose bogeys setting like concrete
That's the smell of silicosis.
@D J i get to play with the other white stuff, concrete. I usually wore my safety specs but respirators never seemed to be around when you needed them. They are also horrible to wear when its 100 out. You can see the dirt marks on your skin from the moisture and sweat from wearing the mask. Few years ago OSHA started pushing for silica safety. It's a pain in the ass. i suppose it is safer but really, what isn't bad for you and what isn't known to the state of California to give you cancer.
No u couldn't
Thank you so much for this Dave. Ever since the Mythbusters episode, I've always wondered if a skilled explosives expert could have broken up the concrete without damaging the vessel rather than just filling it with anfo and completely obliterating everything. I expect it would have been even easier in their case as it probably wasn't nearly as high strength nor fibre reinforced.
They just set out to make sensational TV.
@@demolitiondavedrillandblast oh it was sensational alright.
That is really how it is done when concrete hardens in the mixer. You would be at it for weeks otherwise.
Wait a minute! The Mythbusters got the concrete out! There was no concrete left in the truck when they were done. :)
Also there was no truck left unfortunately.
@@cpt_nordbart details. 😂
@@cpt_nordbart A minor detail....
Yeah he should've since it the Mythbusters method, he would've gotten more views garunteed 🤯💥💣
It was a long time ago but from what I remember didn’t they have a FBI explosive specialist helping them out. I think they tried different levels until the big finale.
I thought that the whole thing was about to explode but damn they really good with explosives
A full load of concrete left inside to set solid. That's passive sabotage.
No, just a hydraulic failure in this case, have done other truck mixer that definitely was sabotage though.
@@demolitiondavedrillandblast just that we had that happen as well and managed to shovel and bucket most of it out. Warm work though.
And the smell of ammonia?
Fascinating Dave! Round two you could see the blast wave rebound on itself
Retired Boilermaker, they used to have us go in the boiler with a 10 gauge shotgun. We used it to shot the clinkers out between the tubes in the superheat section. The trash burner in Newark NJ used ammfoe and broom handles to blast the clinkers out using the concussion, the whole boiler would shake and move.
Common practice Ken.
I have been told this was how mixers were cleaned out after concrete set. Thanks for showing this.
This is the quick way.
Great work Dave.
Having sat in a concrete skip(kibble) in my youth with a jackhammer and needle gun for hours removing slab concrete I can only be amazed at this. 100mpa!!!!
Only you would know the difficulty WK, I had never heard about concrete that strong either and the fibres make it a lot more difficult they tell me.
Over the years I've come across old front porch stoops we would beat on for days with a jackhammer just to get them manageable to move. A handful of times we surrendered and used as fill once we had chipped away enough to pour the replacement. These were originally poured @1950-60 era in North Missouri and always had river rock aggregate. If shifting hadn't rendered them unusable they would have lasted another century. I always dreaded bidding one of those jobs they never were easy or the same!
@@carolrobinson7779 I remember coming across that sort of thing back when I was doing landscaping. Banging away at it all day with a breaker mounted on a Bobcat, just to get it small enough to pick up with the machine. Once, gave up and laid a new path using the old as the base, after finding the old to be up to 300mm thick, with 20mm thick rebar in it, and also tied into the building's foundation. That one was at a early 1950s era LDS church chapel. Those were never easy jobs!
@@carolrobinson7779 Yeah river rock driveways in missouri are built like roman roads. Indestructible.
"You were only supposed to blow the doors off." Should have called Dave...
Yeah they were probably just supposed to give the drum light cleaning...
That's cheered my Monday morning up, thanks Dave.
Glad to hear it Tim.
Wow, this is incredible and again I have unintentionally learned something, great camera placement. Hmmmm I can only imagine how you loosen the lid on a new jar of Vegemite at your house 👍
Hahahah - yeah, 2 turns of det cord gets any lid off!
That's brilliant. No vegemite no problem!
@@demolitiondavedrillandblast And then another strip of det cord to get the vegemite off the ceiling?
Should have put a fire mission down on it.
5 rounds HE Fire for effect!!
Direct fire from M777 or some rounds from the Dita spg could do the trick.
Pffft damn Arty
Repeat or say again?
@@brooksieluke If I hear repeat over the radio, I'm putting ANOTHER 5 rounds on target.
@@JT-CO That's how people die. I have nightmares of saying that word on the radio. I have deleted that word from my vocabulary.
Great views from inside during the shots. I was wondering what the fiber was, glad you answered it at the end.
Glad you enjoyed it!
Skill , experience and wanting to satisfy the customer instead of thrilling for ratings seems effective ! Bravo !
Thank you very much!
Demolition Dave is awesome. Thanks for making these videos, these are super cool and you have a great personality. Hope to see many more!
More to come!
Well that's a unique job. I would expect its tough to guess how much without the drum failing. My admiration.
Starting small is a good plan.
Do it like Jamie Hyneman. Grab a crate of dynamite, then take another one. Just to be sure, take a third. Put all sticks in a pile inside and light up. Success.
Lol he said “portable mixer” like someone would have this in the back of their truck for a day job
Ok, relocatable mixer.
I carry one in my rucksack
@@demolitiondavedrillandblast so... how big is a big one? Like, too big to drive about? Built on site and demolished after? Or is it like for massive factory production or something?
@@Mogliz0rz very much bigger than this and they construct an on site batch plant and disassemble it to move to the next job
Dave love your videos!!! Your humor and descriptions as well!!
Glad you like them! Please like and subscribe and share.
Love it Dave. Glad you filmed it and took us along. I've heard about this before, and I saw Mythbuster's overkill version, but I've never seen it done properly. I bet you have to worry about splitting the barrel somewhere.
The Mythbusters version was all about making sensational TV.
That was very different and some very reinforced looking concrete would not have considered blasting an option you are a true professional look forward to your' next post.
Thanks for tuning in DF.
I was really surprised that you could see anything at all after the blasts.
And those blasts looked very gentle. Interesting...
They were relatively gentle little blasts.
Straight and to the point, good angles, decent explaination, hekkin great video my guy!
Thanks Summer! Plenty of similar videos on this channel, please like and subscribe.
Well now, I found a new channel I enjoy on the last day of our lockdowns. I know what I’m doing. Subscribed and onto his next video!
That's great news!
That's a perfect example of where the autostem product works great. Very effective and you can drill the small charges with a hammer drill.
Just checked out your channel, subscribed and will fully check it out later, we will talk more about autostem.
Incredible job with no apparent deformation of the steel especially given what was need to account for the carbon fiber thread inclusions.
Its not carbon fibres... its glass-fibre, polypropylene, steel or macro-synthetic fibres...
www.roadstone.ie/product/fibre-reinforced-concrete/
Great job , always a pleasure watching a seasoned pro.
Glad you enjoyed it
Great work Dave! Explosives to the rescue once again!
I worked in a silica mine a few years and used dynamite to blast down the walls. We would drill 6 holes 10 feet deep each about 5 feet apart. Load 6 sticks of dynamite in each hole spend about 4 hours packing the holes . Blast them all at once and hope for the best. If everything goes right all you would hear is a snap the the wall would come down then the work started in 3 days .
Why wait 3 days?
@@mrbmp09 got to wait at least 3days so everything has fallen. Don’t want to be working around walls and have a bunch come crashing down on you. I had it happen to me once while close to wall . Wall came down I just barley jumped off tractor in time . Couldn’t see nothing of tractor but a little of back tire spent the rest of the day digging tractor out.
I always said there was more to Dave then means the eye. He's got a bag of tricks for everything.
You Betcha.
Great job Dave! Thank goodness your only small bloke, what a tight fit, there’s not many blokes who could do that job! Well done.
Hi Con, you might be physically excluded from this line of work.
another fascinating video Dave .hats off to the driller.the dust and noise in there would have been extreme.thanks for posting.
Glad you enjoyed it Bruce.
that giant swirl of smoke in slowmo is amazing
Sure is.
I've always wondered how they clear out set concrete in a bottle. Fascinating stuff
It's more common for a guy with a jack hammer to spend a few days in there, this one because of it's small size would not allow a big jack hammer, only a small hand held air pick.
Normally they use air chippers - I work at a ready mix plant and every so often the trucks drums need chipped out and we hire people who come in with hand held chippers climb in the drum and do a great job without the risk of blowing up the truck or a fellow employee
So this seems to be strictly for entertainment and that’s about it
I was busy yesterday..... this is right up my alley
Oh, really? I have a job for you, hope you are not to large.
Amazing, the alarm sound is louder than the explosion 👌
Demolition Dave is where the "work actually" meets actually works. Sweet results again, Sir Dave! The filth never ends but seriously, kinda wished you were wearing respirator PPE though. I really enjoy your, no excuses; work, progress, egress shows here on "the tube."
Look again JW, I had my Sundstrom SR100 half face respirator on, there is no way I would go in there without it.
that was awesome!! when younger i had to climb into one of them to 'clean' the bits out of
It's a young mans job all right.
@@demolitiondavedrillandblast oh i couldnt do it now not one legged wear'n a prosthetic heck i have a time climbing a ladder LOL
Great - but I was waiting for a huge smoke ring to come out. 😉💨
Looked like wire in the mix - I'm glad you explained what it was.
My buddy used to remove concrete from trucks for a living. They would go in with jack hammers, sludge hammers, picks and wherever else they could use to break it up. I bet he would have loved this method over being in 95 degree heat inside a oven that’s 120 or more running a jack hammer for 10-12 hours a day all summer.
It's a hard job Rusty.
Good job Dave👍👍
Good thing you're not claustrophobic 😁, that looks really tight place to work 😳
I am claustrophobic and there is no chance that you would have got me in there.
FYI, there are clays that, when mixed with water and poured into holes, will expand to hundreds of times their mass and break rock and concrete up. It takes a day or so but its probably cheaper than the explosives.
And most of the time you don't even need to be there, so no wasted man-hours.
Dave does that, too!
Could you please help me find this clay? What is it called?
Awesome! I’ve never seen such clear footage right by an explosition. Rip to that camera
There is some more of this coming sometime soon Waynel, the camera was OK. As turned out it was damaged soon after when the wind blew the tripod over and the lens hit a rock.
I recognised the fibres having co-operated a concrete batching plant. We used to sell concrete with the fibres, but the customer needed to provide their own wash-out. The issue with washing-out at the plant is the water recycling system. The fibres clog the pumps used to move the water back into the batching system after washout.
It wouldn't surprise me if washout was refused to the operators of this barrel.
That is something that I had never thought of.
Definitely earned your pay cheque that day. Don't think id enjoy that one haha
That was a very different blast! Shows your skill level controlling those shots! Amazing! Very cool video
Glad you enjoyed it!
Aaahhhh....the smell of freshly exploded concrete & carbon fiber dust! Nothing quite like it! GREAT job, Dave! AND great camera work, too!! Stay safe, Jim
I tried very hard not to get any smells of it Jim.
Much better than misbusters, You accomplished something useful thanks for the show and give that brave camera a fresh new battery for it's troubles :)
The camera needed a good clean with compressed air between shots.
They got to a point where it was all explosions for show (& the American audience). Did little miss Muffet sit on a tuffet? Lets blow up the tuffet with C4 to find out!
@@davenz000 The only good thing about all of those explosions and the use of very high speed cameras was that you got to see the formation and expansion of the shock wave. I found that to be very interesting.
100mpa with carbon fibre, that’s a special batch someone left sit.
Expensive mistake or bad planning on someone’s part.
Yeah, most probable cause is usually hydraulic failure or electrical failure.
@@demolitiondavedrillandblast I was wondering about that. Depending on the relative price of the machine it might be worth having a backup generator and a good stock of repair parts handy.
Otherwise, if the machine is cheap (which I doubt) just take the financial hit if the machine or power go out, pay to dispose of the machine in a landfill, and buy another.
This was very cool! Man I love TH-cam, where else would you be able to see such a specialized job in real life? You get into some pretty cool stuff, Dave!
I totally don't watch any TV at all these days David.
@@demolitiondavedrillandblast Too many interesting videos to watch on TH-cam .
Had a good laugh when you mentioned Mythbusters Dave. Top job getting that lot out, kinda wondering what the customer was using it for now.
This machine was in an underground mine site when the mix went off, it is currently being "serviced" and will then return to the mine.
Thanks dave and well done. If you ever need to break Chinese concrete a loud sneeze will bring down the tallest building.HA HA HA.
Ahh... my coffee just came out my nose.
But it's the US infrastructure that is falling apart...! 😀
@@henryrollins9177 Not because of rubbish materials less than a decade from their initial construction date, but rather from negligent management of proper maintenance practices to suppress necessary taxation rates or unconscionably enhance profit.
True Story no concrete but also no truck! ! ! !
@Steve Arthur unless its that hospital housing wu-flu patients that collapsed a week after it opened.
"Unlike Mythbusters we're going to do it the way it works." Lol, I love it! Mythbusters were so full of themselves at times.
They may have done it wrong on the show but you can't deny the end was impressive
What's wrong or right depends on your goal... Mythbusters didn't intend to clean out the truck.
@@rorschacht8478 I understand that, but on multiple episodes, and it was theme not the just the title of the show, they stated the myth was busted. They both promoted themselves as being very scientific but oftentimes they were not.
@@troyezell5841 That's true but they were making a show. You should check out Tested on youtube, adam explains and talks about the show a lot.
@@rorschacht8478 I don't mean to sound overtly aggressive toward the show, it was just a bit excessive at times. You make a good point.
Glad you explained the fibres at the end
Thanks for watching.
"customer is happy", driver that mucked the load holding the jackhammer in the corner is ecstatic!
Nothing better than a confined explosion.
I don't miss cleaning those. Never got to use dynamite, closest thing we did was let em freeze really good then hit em with hot water.
That is an interesting idea.
Does that heat shock crack the concrete effectively?
Demolition Dave, I really feel for you. I can’t fathom anyone not washing out a mixer, big or small! Wow.
I think it had a hydraulic fail Marc, not much they can do then.
@@demolitiondavedrillandblast Never occurred to me - that feels better!
Oooh that was different - more marvelous blasting fun - cheers for sharing it with us - sending regards xx
Glad you enjoyed it
...sure beats a car wash...lol...good job, stay safe and have a great week..
I think I needed to go through a car wash after working in there Bob.
@@demolitiondavedrillandblast ...lol..
Mythbusters method worked just fine! lol
Thanks for letting us know the aggregate i wondered why it looked reinforced and great work cause i know that even drilling the holes to put the explosives in will be a mission
Yes, nothing easy about this job.
Well dun . The second round with the very brave camera was brilliant . I viewed it by going to settings open then open playback speed and click on 0.25 , then sound off , full screen and play AWSEAM
Carbon fibre aggregate :O
The respirator is *well* worth it, I mean concrete dust is nasty but dammmnnnnnnn that's a whole other level.
For sure, we had a vac system sucking through it but not the space I would like to be in very often.
Indeed. CF dust is like a bunch of little multi-pointed razor-blades. In your lungs, it's like Asbestos on steroids, and then some.
3:24 what are all those small strings hanging off the concrete? Did they mix a batch of glass fiber reenforced concrete or is that some steel wire?
Short bits of carbon fibre as aggregate / reinforcement.
@@demolitiondavedrillandblast Damn, no wonder they went to blasting.
It's morning here and I'm late leaving for work and I noticed Dave has posted.... Think I'll just watch it 😂
He, he, thanks Hammy.
You’re going to get yourself stuck in traffic!
Lovely demo of small charges delays sequence... great shots Dave. Looked like a pretty good result. Claustrophobic work place!!! :)
Very tight place to work Chris.
Thanks for telling us the concrete specs. I wrongly assumed it was fiberglass. Interesting job for sure.
Thanks for watching Shain.
Yeah that's a bit more sensible than just loading it with 500lbs of ANFO, lol!
(I seem to recall that was how much they used, don't think the quantity was actually mentioned until one of the look-back episodes)
It was probably a bit heavy handed.....
@@demolitiondavedrillandblast the actual experiment where carried out with small amounts of explosives tonprove the method. And their conclusion was thatbit was plausible and likely worked. Then they got a bit carried away, and just let us say thatbthe cement truck ceased to exists.
Thanks for sharing video is awesome I didn't realize this would be an option although still so much work after the fact
Glad you liked it Ty, There is no easy way forward with these.
they alrdy did that on myth busters . with awesome results.
there you go Mythbusters dave can do it . 💹
I wonder what else they failed at that I could do??
I don't think Mythbusters bothered to drill any holes, who knew that drillholes can make it work? Also, Mythbusters didn't really care if the concrete came out or not, it was just TV.
There is a yard at a concrete company in Los Angeles that has more than 10 full size mixers filled with concrete just sitting for years. I think they don't bother trying to get the concrete out anymore, they just eventually cut the mixer up for scrap steel.
Grandfather was a mason. He knew of a guy who let the concrete set in a mixer like that. The boss made the guy bust it out with a sledge and a chisel
That would be the worst month of his life.
Awesome freakin footage guys
More coming soon!
You have the best job ever !!!!!!!!!!!!!!!
Thanks Ralph.
I think whoever let it set in there should be the one that has to clean it out! 🤣
I think he quit
@@fusco515 I think he was fired or shot. Maybe both.
@@jakubkopec9313 Hung, Drawn, Quartered, Shot and then Sacked.
If a mechanical issue is preventing the barrel from rotating, it can't be discharged. It happens.
I would have shouted into the mixer, "FIRE IN THE HOLE!"
Nice inside shot 👌
Thanks KL and thanks for watching.
Hi there this video was on my sejest homepage and I thought it would be interesting and it was so much that I have subscribed and shered it to loved the slow mow with the detonation and then the shock wave
Thanks for joining us Paul.
Great job Dave. Would have loved to learn the backstory of how that happened.
The boss's son😉🤫
I don't actually know the back story on this one Zaph.
@@assassinlexx1993 Well if it wasn’t the Boss’s son then who ever did it owes the Boss some very expensive booze to make up for it. That is assuming that they weren’t sent down the road straight away!
@@markfryer9880
I would be surprised who did this. Would have a job.
It happened to me once. Basically, this can happen if something happens while en route to deliver ready-mix concrete. A breakdown, caught in traffic, etc. Broken axles are a common incident for concrete mixers maneuvering through new construction then the truck gets stuck with no place to unload. You only got about 3 hours or so, depending on the mix and temperature. My story is I was driving a loaded 8 yard (16 tons) mixer and the driver side frame rail broke while I was driving, the drum was leaning heavily to the passenger side. The first thing the mechanic said to me was "How'd you keep this thing upright?" I dunno, I just held on for dear life. Meanwhile the truck sat for too long while the mechanics put a massive weld on the frame to get it back to the shop. That truck sat in the back of the yard for years with the cured concrete still in it.
Wow, 100mpa and fibres!! Be interesting to know what that was being used for, 👍🇬🇧👍
That's for my garden barbecue. My neighbor always try to steal things from me. From now on, he'll need explosives.
@@arneanka4633 too bad, your neighbour is now going to call Dave when you're out and say it's his house and he wants to remove those.
What is is used for? ASCE concrete canoe competitions. Concrete countertops..sometimes done upside down with the surface poured first using a fine aggregate surface, then the fiber reinforced main layer.
Expensive as frig for anything else.
@@keithjurena9319 how long does it last?
Fine work
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Great job Dave. Please show us some photos after cleaning out
I will get some.
I WAS wondering how they cleaned them out at the end of a YEAR!
Most of the regular clean out is just removing build up because over time it gets thicker and the capacity reduces, this is a whole different level of disaster when a full load goes off inside.
@@demolitiondavedrillandblast Word for word, that's what she said.
Unlike Mythbusters . . . LOL. Those guys were always so confidently incompetent.
Mythbusters was a quasi-scientific entertainment variety show. The talent "not knowing what they were doing" was part of the act.
Hey at the end of the day they had no cement left or truck for that matter
Great job especially as it’s powerful fibre reinforced concrete.
Yes, thanks, this was new to me, all of the previous ones have been regular concrete and one with course quartz pebble mix - that was difficult also.
You are a brave man, Dave. I would have had the yellow gas bottle visible in the last shot removed (welding gas/acetylene?). Acetylene is really unstable, and a nice shockwave could have set the bottle off, removed the wall and put the mixer in low earth orbit... Glad it worked out for you!
Fear not, the yellow bottle was only a compressed air receiver.
Back in early 1990s I worked in a limestone quarry. Another part of the company was a lime plant. The lime kiln was,I'm guessing,200 ' long about 15' in diameter. To clean the slag out of the kiln,the company had a 10ga. Shotgun on a tripod and some workers stood there all day, maybe several shifts and fired 10 ga. Slugs at the paddles inside the kiln. I've seen 80 lb lime bags,dozens of them,full of spent paper 10ga. Shotshells.
That is a lot of lead to spray around inside!
NICE WORK
Thank you! Cheers! more coming soon, don't forget to like and subscribe.
Nice . Years ago my brother told me about using plastic fibers to reinforce the concrete .
First time I haver seen it David.
Great job, I had heard that they were placing explosives to remove the debris, where I worked a colleague removed about 5m3 with an electric demolition machine, greetings from Chile.
Who said this couldn't be done? The ready mix company where I grew up 50 years ago had 3 or4 extra barrels they kept at the quarry for times like this. The explosives guys at the quarry cleaned them out. As kids we loved to watch. One of them told me if they did it right it would temporarily expand the barrel like a balloon and most all the concrete would come loose. Those old boys were a hoot.
A lot of skill in this industry has been lost Bill.
@@demolitiondavedrillandblast I agree. Sadly, many industries have experienced the same.
Thank you for the reply. A very cool video. Best regards from Indiana, USA.
Did they turn it on to get the big chunks out? Fun to watch. Can wait to see what's next.👍👍👍👍👍👏🏻👏🏻👏🏻👏🏻👏🏻
Got to be a bit careful doing that as the whole thing can overturn!
Hi Dave mate☺ you might say that was concrete evidence of somebody cocking it up, lol, I didn't envy you being in there drilling all them holes, but job done mate , and they still had a mixer at the end of it, thanks for another great video, stay safe, best wishe's to you and your's, Stuart.uk.
Thanks for tuning in again Stuart. Concrete evidence, sure is.
I remember being inside the full sized ones with a sledgehammer and jackhammer... Your method is much better.
Not easy work and enthusiasm gets fairly low by the second week.