Two Concrete Trucks Fill a Trench for a Botched Water Main Valve Repair
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- čas přidán 12. 10. 2016
- A water main in front of my house failed and construction began to replace ther main and add a new valve and re-connect our house to the municipal water supply. At this phase of the construction, two concrete trucks were brought in to fill the ditch with a slurry mixture (CLSM). It's not concrete, rather it's an engineered slurry that doesn't require packing like dirt and allows for the asphalt to be quickly laid without risk of the road developing a dip. They had some problems getting the valve access port to the correct level.
- Auta a dopravní prostředky
That is properly called “flowable backfill”. It is a mainly sand, gravel, water mixture with only 1 bag of cement. It is used primarily when it is a high traffic road or when mechanical compaction is not an option. That looked like ductile iron pipe (DIP) and it looked a little sketch. This was probably the best option for backfill. No need to worry about voids and it’ll be stiff enough for blacktop in a day or so. If they ever need to excavate around that valve again, that fill will break apart pretty easily.
That being said, I saw some things OSHA would have a field day with.
We call that lean fill.
Come with me and you will a see a world of OSHA violations!
Can I be the ladder
We call it lean mix
We call that lean flowable backfill fillcrete.
Let me just say, I love me a front loader with an experienced driver. We had a job one time and we harldy had to touch it... leveled it out, pictureframed it and done in record time. I tipped the driver $100 cash. I still dont think it was enough. That driver saved us so much time and work.
What did you tip for? It was his job?
In some localities, the cement mixture is called two sack. It does not encase the valve like regular concrete and can be easily broken apart if necessary. Typically, this mixture is used in electrical work were conduit is laid under a parking lot or driveway with vehicular traffic. It provides good support to keep the conduit from being crushed and the ditch where conduit is set from sinking since the ground will never be compacted to 100% like what nature does.
Shoutout to the ladder manufacturer for such a tough ladder!
It's flowable fill...
A sandy mix with a cement ratio that keeps its compressive strength low enough to dig after setting, yet firm enough to equal mechanical compacted processed stone...and installed quickly.... without voids or the vibration that can compromise the water main..
You’re the 2nd person that’s explained what this is without treating the rest of us like idiots. Thank you!
👍Thanks for the INTELLIGENT SIMPLIFIED AND DIRECT RESPONSE. Been in The Business for many years..Retired now but
Never heard of The Mixture-
Makes Sense
Just couldn't figure out the STUPIDITY of what They were doing 🤔 Lol
It’s hilarious to read the comments from folks who are oblivious to what’s going on. And kudos who know.
No, what’s “hilarious” is that all of you who do know what it is treat the rest of us like dumbasses. When we read “TWO CONCRETE TRUCKS FILL” we expect CONCRETE to flow from the CONCRETE truck.
We have no idea what flowable fill is. Y’all are quick to say how stupid we are for not knowing but don’t take the time to explain what flowable fill is.
But I’m sure people like y’all know absolutely everything and never need things explained to you.
@@Shawn-rq4py most of the comments are of the, "boy what a bunch of idiots!" variety. It's hard to politely explain what is going on to someone who has already decided and publicly announced that the crew doing the job correctly are, in fact, stupid.
Very nice and hard work
Love those front discharge Oshkosh trucks
To all the comments about the uses of concrete its not concrete, read the above telling you what the video is about its an engineered method of back fill that requires no compaction tools. It's a brilliant idea as there is less chance of disturbing the water mains connection. Now if a simple bricklayer from Yorkshire can work this out why can't the rest who have watched this video. I have never seen a truck or a method of back filling like it anywhere in the world but, I for one think it a really good way of repairing the infer structure . Just not sure about there H and S methods though 🤓
Flowable fill is a self-compacting low strength material with a flowable consistency that is used as an economical fill or backfill material as an alternative to compacted granular fill. Flowable fill is not concrete, nor it is used to replace concrete.
Flowable fill is a controlled low-strength material made of cement, fly ash, water, sand, and typically an air-entraining admixture. This mixture is useful for backfilling utility trenches, mud jacking, pipe bedding, abandoned sewers, and many other applications.
This mixture is capable of filling all voids in irregular excavations and hard to reach places (such as under and around pipes), is self-leveling, and hardens in a matter of a few hours without the need for compaction in layers.
Flowable fill should have a compressive strength between 20 and 80 psi (150 to 600 kPa) so that it can be easily excavated for repairs, future installations, etc.
good job 😀😀😀😀😀
Awesome video!
Wow, this is so cool! I love seeing how things are done. The little kids loved it too, especially being able to watch it while sitting on a big ole muddy mountain...what a great day.
You would have thought that they would have established the finished height of the riser pipe before they started pouring the fill.
interesting looking concrete truck. Very different to what we have Down Under.
Same here in Canada! Lol weird hey!
Lovely truck to work from. We call them right way trucks. The driver can see the job, move the truck and compleatly control the chute all at one time. They also can do all that faster and safer. That lets one more person do the real work with the crew. That's the right way.
That's a front discharge mixer
@@davej7458 makes sense
How we do up above
Nicely videod makes a change from the normal 👍
But cut to soon just to make a misleading point.
Flowable fill💯
that's what i thought too.. sand, powder and darafill...it doesn't harden, just dewaters...
Flobo, flowable fill.
Sehr gute Idee, ein Ventil einer Wasserleitung einzubetonieren, damit man auch ganz sicher nicht mehr dran kommt. Klasse!
Nicht konkret, es ist fließfähig zu füllen
Fließfähige Füllung ist ein selbstverdichtendes Material mit geringer Festigkeit und fließfähiger Konsistenz, das als wirtschaftliche Füllung oder Verfüllmaterial als Alternative zur verdichteten körnigen Füllung verwendet wird. Fließfähige Füllung ist weder Beton noch wird sie als Ersatz für Beton verwendet.
Fließfähige Füllung ist ein kontrolliertes Material mit geringer Festigkeit aus Zement, Flugasche, Wasser, Sand und typischerweise einem Luftporenbildner. Diese Mischung eignet sich zum Verfüllen von Versorgungsgräben, Schlammvortrieb, Rohrbettung, verlassenen Abwasserkanälen und vielen anderen Anwendungen.
Diese Mischung ist in der Lage, alle Hohlräume in unregelmäßigen Ausgrabungen und an schwer zugänglichen Stellen (z. B. unter und um Rohre) zu füllen, ist selbstnivellierend und härtet innerhalb weniger Stunden aus, ohne dass eine Verdichtung in Schichten erforderlich ist.
Fließfähige Füllungen sollten eine Druckfestigkeit zwischen 150 und 600 kPa (20 und 80 psi) aufweisen, damit sie für Reparaturen, zukünftige Installationen usw. leicht ausgehoben werden können.
@@davidnull5590 Thank you for the answer.
Always fun pouring flowable fill
muy pronto para sacar ese tubo van a bloquear y tapar 100% la valvula?
Brilliant idea. Thank you for sharing this video and have a blessed day 👠
Kid's love big trucks.
This was one of many videos that convinced me to go get my CDL.
hope they never have to repair or replace that valve again
It's flowable fill, not concrete. Not that hard to get out again, and indeed a leak from the valve had to be repaired shortly afterwards. No big deal.
Well one of the things they forgot to do was wrap the pipe with plastic, that will keep the pipe from getting corroded when it touches a cement or slurry if it was used... Whatever material that was poured in is going to immediately start rusting up the pipe and corroding it... In a few years that pipe will begin to leak again...
Chucky Alone are you a civil engineer? do you do large municipal improvements like storm drains and water main replacement? now a days all of the pipe and repairs are done using ptfe pipe which will not rust or corrode. dont try to speq bullshit as truth and fact if you have no clue what you are talking about
Chucky Alone just be aware that pipe, if not being ptfe, was most definitely coated with a material that prevents the pipe from corroding. The valve is not only primed and painted but id be very surprised if it was not constructed of a rust resistant material such as galvanized steel, if not made of an aluminum alloy.
@@johnnyrebel11 you still have to wrap all the fittings with plastic and tape. We install for for municipalities and every joint has to be wrapped and tapped then concrete poured around it
Interesting idea of preventing another failure :)
Different Agitator
..love to see the state of the cab after a blowback from a static concrete pump..
Hahaha I can spot a Chicopee truck from a mile away. I'm from Amherst. That's flowable fill. Pretty cool stuff.
Amherst ny?
I agree with u man as soon as I saw the white and red I knew it could only be one 😂 I’m from wilbraham ✌️
good video work
God help anyone who has to do any work to that in the future.
Unless I’m seeing wrong I believe that is a full sized saddled valve assembly that appears to have to be able to shut off into the bottom of the ductile main.
I’ve never seen this before but I’ve been out of this field of work for a few years now.
Flowable fill is great stuff. Drive on in an hour or so.
It's a SLURRY MIX!
@@richardsimpson3136 same thing.
xffrffftw
@@jeffmabry4112 do you
Osman e Abdolaye issa
lmfao omg the ladder setup has portuguesee written all over it. we called this u-fill its pea gravel and concrete sand and i believe ours was 7% portland cement. it gets pretty hard 100% compaction. with saying that it is more money than using a ho-pack, and you can lay ashphalt right away if you wanted to or had to, this stuff takes a while to set up, we would leave over night usually. but most cities prefer this in roads because people suck at packing if they even do it lol. in our town we are required to cover the bolts on the joint restraint so if need to ever take apart you can, you need jack hammer to get the u-fill off. we would this stuff was like small 1/4 inch styrofoam balls and some type of thick paste/clay type mix, would come in kilo block form, than wrap denso tape around the restraint, and weld an anode to the water main connecting both with a tracer wire, and weld another anode to the valve, and just lay the anodes on the ground on edge of trenches backfill around the pipe with clear stone to just over the top of pipe and around the valve cover the top the valve and base of the valve stem with something (garbage aka old portland bags, card board, plastic etc) so u fill doesn't stick to everything and fill her up!! this is ductile iron pipe, cast iron pipe with a cement lining on the inside circumference.
Love these USA cement trucks! Far better idea than seemingly everywhere else.
@davidbaxter3101: They are Concrete trucks, not cement trucks.
Great jobs
Looks like an insertion valve, they add a valve to a water main where there was no valve before, and they do this while the line is pressurized aka "hot".
This typically is done to isolate the lines "downstream".
Looks like fillcrete to me. Pretty standard, don’t have to worry about compaction under or over the pipe.
這些不是混凝土,是泥漿和沙及水的混合物,裡面是沒有英泥的！
worker gets home : now where did I put my wallet?
moments later
worker: SHIT!
Where did I put my ladder!?
Flowable Fill
Cool video
Curious method in determining the elevation for the valve shut off riser.
At least the comments are on the ball with the exact detail of this method of backfill…sand itself is non compactable and the binder basically keeps it in place for the duration…it can easily be RE excavated if required for future maintenance but it’s quick, almost permanent, and self flowing and leveling…a no brainer…
I'm glad it's just flowable fill,& not concrete!
Thanks
Would NOT Let my child get that close to this project. That preschool boy is too darn close.
Cry me a river. I'm sure your children have a ton of fun. That kid was 10ft away from that hole behind a pile of rocks. He was smart enough to not go past them. What do you think will happen, the ground cave in? If you have kids I bet they're already smarter than you.
That's a MILK SHAKE !!!😂😂😂😂😂
Whoops, wrong truck got sent to the job… oh well, at least the jack hammer guys got work!
Thanks for inserting a valve that can't be keyed because its full of flowable fill
william brennan the valve should've been wrapped in plastic
Não e só no brasil tem gabiarra o ocara em cima de uma escada e 1 copessado para fazer concretagem .
Rookies that valve surround is that hard to set u always set it first if not backfilled will a dry hard fill if concrete or stabe sand u set it first its also meant to finish under the ashphalt not level with it now it has to b scraped or dug low enough so road is level once fixed so many lil mistakes wich cost time and money
The duct tape looks official
Definitely needed a longer ladder to properly down the hole.
como van hacer cuando necesitan cambiar la valvula por motivo de un daño?
Tenían que haber echado el hormigón hasta por debajo de la válvula.Despues relleno de tierra compactada por capas con una rana.Tienes razón,en caso de avería se las van a ver mal.Soy conductor de hormigoneras y así es como lo hacen cuando llevo hormigón para las tuberías del agua.Un saludo 🙋🇪🇦
So cool how often do you get to see this up front
lean concrete (flowable fill) faster repair than compacting soil, easily removed if access needed.
yup yup , retired 41 years yeehaawww
Just the comment we needed to make sense, thanks.
To all the keyboard construction workers/ civil engineers- ITS NOT CONCRETE! Excavatable flow fill.
Ahh thank you for that. I was curious as to all the extra work that'd have to be done in case anything happens in the future.
Maybe you should work on the field sometime“Mr Civil Engineer “. There must always be provision left for maintenance. Didn’t they teach u?
Slurry, probably 2 sack
We call it CDF -conrolled density fill. It is approximately 1mpa concrete that is intended to be dug with a shovel. The valve is a special type that is installed under pressure (hot tap) to try to minimize disruption to the public.
Yes Steve, thank you. Just came off 12K foot install. In the street; a sand and baserock job. Varoius cenent mixes of Slurry are OK, but that's at a higher cost.
Appreciate your responce
Encasing that main and valve in concrete is probably a mistake. In 20 years if they need to get at it, they're going to have a real problem.
Flowable fill concrete.
It's not concrete it's sand slurry
O my god who passed that job off...be diggin it all back up again in a few years to renew that fitting. God help who gets that job....
The excavatable flow fill that is poured here isn't too much harder to dig with dirt. Especially not with a small machine
Not to sure what it is there puttin in but its 2 full lorry loads
@@bootsmclaughlin1438 its a slurry for compaction purposes don't get much harder to dig than dirt but has compaction without using a machine every foot saves hours of time and digs right out when it's needed.
@@jeffmabry4112 still woodin be a job i wood fancy doin bud
Sand, 3/4 Stone and water nothing more, just as easy to dig as dirt but becomes super tight compact when water settles, keeps the water line in place.
Where are my keys? They had a Phil Rizzuto keychain attached to them . Holy Cow!
The next worker who has to make a repair on the pipe in the future will be cursing them out.
Wow..🤔 I drive a concrete truck in Australia and the way these trucks are set up blow my mind (What with their backwads barrels and all) So bizarre.. But I definitely wish our chutes were hydraulically actuated instead of having to place them and swing them around by hand like a mug! Hahah
It's funny you say that because I envy your self unloading container trailers which we don't have here in the states.
Driver has excellent view of the job and doesn’t have to watch hand signals in a mirror for instructions
Any clue why that zig zag design is so common on cement trucks? Here in Indy, our IMI trucks have the same thing, although the colors are reversed of these here.
It's common to have some sort of striping on the drum so its easy to see which way its turning for the drivers. My company has a straight stripe, some guys have spirals, although those kinds make me sick if I watch them for too long.
Good luck if it ever needs repairs again...
So it is not a solid concrete , but a sand with water and other stuff. It's just a liquid backfill material so it's gonna brake? . Did I get it right?
Super wet! What's the slump of that goop?
What climate is this in ? Are you worried about frost moving the road differently around the hole?
That could be a possibility, depending on what the soils are. However, it's also not only a possibility but a very common problem which using soil-based fill, but seldom does anyone question the correctness of that method.
Who would have thought it would be worth watching when you don't have to work that job??
Kinda relaxing actually..
😂😂😂😂😂😂
They shud hv wrapped the valve and valve box in poly. For future repairs or replacement
Absolutely unbelievable what a bunch of hacks these guys are unreal
Mixer mixer ... Good truck
S'il vous plait, pourquoi vous utilisez tout ce béton pour une canalisation d'eau ? Merci.
That’s flowable fill.
The way we do it out here is as followed:
Bed the pipe with 57 rock 1 foot around the whole pipe and then flowable fill all the way up after that.
Esto es otro nivel , asi se puede trabajar sin volverse loco
madre mía dos cubas para enterrar una válvula que ingenieros hay en ese pais
Tenían que haber echado el hormigón hasta por debajo de la válvula.El resto tierra compactada con una rana.En caso de avería se las van a ver putas.Soy conductor de hormigoneras y como te he dicho es como se deberá de hacer.😲
Could have got away with filling the hole with sand then flooding with water to gain compaction in layers. Then top it off with one foot of concrete to bring the level to underside of asphalt. Maybe a little cheaper, but certainly easier to get to the valve if there becomes problems in the future.
Hello Sheldon,
an interesting video, (not only for kids).
Here in Germany I worked for several years for water companies so I found the video so interesting. One of the biggest differences here is the used (and especially the huge amount of) concrete. That would not even be done in Germany with high pressure lines. Reason: The concrete used makes later possible repairs impossible. And the restoration of the former surface (sidewalk and street) will only be more complicated.
Best regards
from Germany.
On this project they didn't actually use cement, but CLSM flowable fill. It flows and instantly compacts so they can pave over it without worrying that a dip will develop in the road. Funny enough, this newly installed water main started to leak and the town DPW came and dug up again and fixed couple weeks later.
Hello Sheldon,
Thank you for the info. We do not know such material here, so your description is all the more interesting.
With us, gas, water, electricity and all telecommunication lines in trench construction are first placed in a sand bed which allows the lines to move slightly during earthworks before they break immediately. Over the sand comes a thick layer of gravel and finally the asphalt. If street water pipes are leaking here, you generally do not need a search device. Since such lines are operated with at least 10bar cracking leaks usually huge holes in the ground, but thank God that rarely happens.
I'll keep my fingers crossed that the line is tight this time.
Greetings from Germany!
Hallo, in Deutschland gibt es das Zeug auch "flüssigboden" bei zb cemex readymix "füma" genannt. Es ist viel Schaum, viel Sand und etwas zement und wird genauso wie hier benutzt. kurzfristig etwas auffüllen, um es später trotzdem ausbaggern zu können. Oder bei zb Tankstellen alte Tanks verfullen
Hallo Frank,ich kannte das Zeug bisher noch nicht, aber vielen Dank für die Info!
CDF has very little cement and a lot of sand it is generaly about 100 PSI. It can be dig out with a regular hand shovel.
Never heard of this flowabke fill stuff but from the comments it seems like the right choice. My only questions why not install some type of access vault around the valve for any future maintenance or repairs that may arise? Burning a valve in my nest any type fill doesn’t seem like a bright idea no matter how easy it may be to dig up.
Yeah i'm a concrete truck driver. This type of mix really isn't used much. Literally for jobs like this one. Also, those front loader trucks look awful to drive. I like the traditional concrete trucks.
I drive these, they’re not bad at all to drive. It becomes 2nd nature in no time
@@vtr_rage1578 To each their own.
It's called FloBo, flowable fill, not concrete...
It's beautiful watching 2 guys do nothing and truck does all the work
Will it never harden
Ma, non capisco , non era sufficiente richiudere lo scavo con della semplice terra come era prima ?? Se si rendesse necessaria una riparazione , poi che fanno ?!!
good work
Would love to see it go into the hole
That is not cement, it is stone and sand mix. It's called washing in a hole
Bueno si está bien pero si c vuelve a desbaratar k ban a romper el concreto no sería mejor dejarlo en hueco por si c yegara a descomponer solamente es una sugerencia o como Ben ustedes
hope that dosen't have to be repaired again. Why not crushed stone?
peter danis it doesn't dry that hard. They could go in there and dig it up any time they want. There's no gravel in that mix just a lot of sand and water and very very little cement.
That is what is called 'Flowable Fill". It's basically sand, flyash, and a bunch of water. It's fake dirt. It doesn't really set. It consolidates.
thank you
Its called Stabilized Sand in Australia
peter danis dfa
Two guys wearing hard hats, but I can't see any knee protection. Kneeling on that wet ply. I learned the hard way an infected knee 3 months on antibiotics and a week in hospital. Very close to loosing my leg. I won't even pass comment on the use of that ladder it speaks for it's self.
Had a similar experience I had a fever of 105 and they diagnosed me with cellulitis learned the hard way and now always take everything into consideration
I have seen some crazy construction methods.
How can every involved in this repair allow it to go sideways like this.
Good luck for the next one to repair or replace this valve.
It's not concrete
@@MuddyCreekOutdoors38 - ahahahaha ok you get in thetr and break it out v ause i guarennyee its gona happen!!
Absolutely this was lazy pori g st its best!!
@@robinrodriguez480 That stuff can literally be hand-dug with a shovel if need be. It's no different than digging through well-compacted sand. Funny how for some people, becoming an expert requires nothing more than a keyboard.
Not concrete, it is flowable fill
Flowable fill is a self-compacting low strength material with a flowable consistency that is used as an economical fill or backfill material as an alternative to compacted granular fill. Flowable fill is not concrete, nor it is used to replace concrete.
Flowable fill is a controlled low-strength material made of cement, fly ash, water, sand, and typically an air-entraining admixture. This mixture is useful for backfilling utility trenches, mud jacking, pipe bedding, abandoned sewers, and many other applications.
This mixture is capable of filling all voids in irregular excavations and hard to reach places (such as under and around pipes), is self-leveling, and hardens in a matter of a few hours without the need for compaction in layers.
Flowable fill should have a compressive strength between 20 and 80 psi (150 to 600 kPa) so that it can be easily excavated for repairs, future installations, etc.
Easy pour for the driver
Is the mud supposed to be that wet? Why so on this job? The ladder technique seems a bit sketchy tho
Flow fil is a mix of sand concrete and fibers and super hot water mix it burns if it catches you
It's called flowabil fill
It’s not concrete it’s CDf . No compaction needed but you are still able to dig through it fairly easy with a machine after it cures
I was wondering why concrete.
It's called flobo, flowable fill.
OSHA when did a ladder become a platform walk surface and he is more than 6' off the ground and not tied off.
How would you like it if they came to your work and filmed you without your permission?
They are in public and thus are subject to filming. There is no expectation of privacy when in public. Supreme Court ruling per first amendment to US Co -nstitution. If you are in public you may film anything you can see.
I'm not buying cement from YOU !!!! 🤣🤣🤣🤣😍😍🤣🤣🤣
Qué manera de ahorrar concrete !!! 🤔
That ladder and plywood deal is extremely dangerous. Wow. It is barely spanning the hole. Improper use of a ladder in the first place. If that guy falls in I don't know if there is any chance of getting him out. Stay safe!
Actually, since the density of this material is quite high (for example, compared to water), a person would not be in danger of sinking out of sight if they didn't move around a lot. You are correct, though, that safer procedures should have been used.
Karen in the house
I've never seen that type of cement truck before. that is so weird. the ones we have in Arizona are standard trucks with the chute in the back.
Front loader, holds an extra yard and the driver can run the chute from inside the truck. Makes pouring a lot easier
Welcome to the US of A where we use front loaders
These types of vehicles really very by state / region. A lot of that has to do with different weight and length requirements at the state level. If you travel look at dump trucks for instance they differ a ton between states.
Cuando se averie esa llave de paso no se cómo la van a cambiar