Big Concrete Pour in san Diego!

[fkovalski]

San Diego Concrete Pour







Notice the trucks lined up at the top of the photo.



This was a 258 truck-ballet in which the contractor placed 11,500 yards of concrete in one monolithic pour that got started at five in the morning and finished by three in the afternoon.



Did you do the math? That's 258 trucks in 10 hours. 26 trucks per hour. Or if you like, 1 truck every 2 minutes 20 seconds.

 

[broncojohn]

Wow, thats a lot of concrete.

 

[fkovalski]

Yea it is! I designed a project once that required 35 trucks for a mat slab and I thought that was a lot!!!

 

[Degodiesel02]

Just curious but unless those are "special Trucks" that hold more than 10 yards each, 258 trucks only yields 2580 cubic yards of concrete. Were there more trucks at each pump location?? Sorry do this for a living and it just caught my attention

 

[fkovalski]

Just curious but unless those are "special Trucks" that hold more than 10 yards each, 258 trucks only yields 2580 cubic yards of concrete. Were there more trucks at each pump location?? Sorry do this for a living and it just caught my attention

My guess is that the "ballet" refered to in the text (BTW- that was quoted from the link, not my words) is that that the 285 trucks were running back and forth as transporters (several times) rather than the total concrete puored?

 

[catoiler]

I just want to know how many finishers they had !

 

[klenger]

I'm wondering what they did to get all the heat out the concrete as it setup. When they built the Hoover Dam, they used water cooling throughout the pour to remove the heat, and I think it still took several months for it to cool even at that.

 

[MEby]

must have a heck of a cordinator to run that project. :-{}

 

[Byershome]

I wonder how many plants this tied up for the day, a lot of times they'll put one right on site for jobs this large however given the amount of concrete and short period of time, a plant large enough may not be economical unless your doing pours like this often enough. No doubt this little pour cost a lot of other contractors some money because they could not get any concrete this day. The excuse from the concrete company went something like this... ... .....



" Our plant broke down... . "

"We ran out of cement, we'll get a new batch this afternoon"

"We bought our cement from our competitor and it is not up to spec..... "

"We had three trucks break down... ... . "

"We had three drivers lay out... ... ... ... "

"You ordered concrete today? We don't have you in the computer. "

"Our computers crashed last night and we lost all of today's orders... "



A recent addition to the list.



"You have reached your quota for the week, due to a shortage of materials you will have to wait until next week. . "



:-laf:-laf:-laf:-laf

 

[ToolManTimTaylor]

I'm wondering what they did to get all the heat out the concrete as it setup. When they built the Hoover Dam, they used water cooling throughout the pour to remove the heat, and I think it still took several months for it to cool even at that.

The Concrete in the Hoover Dam Isn't Fully Cured.

While concrete usually gains most of the total strength within the first month or two of curing, the Hoover Dam continues to gain. The reason is that the Hoover Dam has significant moisture present to continue the cement hydration process. It is true that all concrete will continue to gain strength if some moisture is present, but the rate of gain is not significant.

Curing is one of the most important steps in concrete construction, because proper curing greatly increases concrete strength and durability. Concrete hardens as a result of hydration: the chemical reaction between cement and water. However, hydration occurs only if water is available and if the concrete's temperature stays within a suitable range. During the curing period-from five to seven days after placement for conventional concrete-the concrete surface needs to be kept moist to permit the hydration process. new concrete can be wet with soaking hoses, sprinklers or covered with wet burlap, or can be coated with commercially available curing compounds, which seal in moisture. *



Design requirements for strength of conrete differ and thus the concrete mixes used for projects will differ. There is an old rule called the 28-day strength rule. It indicates that a project should typically reach total expected design strength by 28 days.



No I didn't stay at a Holiday Inn express last nite. All this was provided by: Lehigh Cement Co.

 

[rbattelle]

I just want to know how many finishers they had !

Imagine how many concrete boogars that pour resulted in for the laborers!



What's the building going to be?



Hey Degodiesel02, I also thought a standard cement truck was 10 cu. yd. I was dreaming about pouring a concrete floor 60'x120'x10" deep, which works out to 200 cu. yd. after rebar. That's a lot of trucks. Yikes.



Ryan

 

[jnelson]

I just want to know how many finishers they had !

Now you know why the borders aren't closed yet. :-laf

 

[rbattelle]

It almost seems like it would've been easier to mix it in-place. Just pour concrete in there dry and have huge water hoses adding water at the same time.

Ryan

 

[Dl5treez]

It almost seems like it would've been easier to mix it in-place. Just pour concrete in there dry and have huge water hoses adding water at the same time.



Ryan

You'd never get it mixed correctly... wouldn't work very well at all.



Wonder if that was a prevailing wage job? Oo.

 

[catoiler]

Well the mud at our plant is 125 a yard retail 93 wholesale that cost a few dollars!!

 

[p-Bar]

Saw a lot of Superior Ready Mix trucks there, I'll ask one of the drivers up my way what this project is. It looks to me to be another hotel in the redevelopment district neat the 1st place Padres ballpark

 

[Bloomy]

That's pretty cool. The largest poor I worked on was 840 yds for a bridge spread footer. Took us about 10 hours. We typically didn't use pump trucks. 100ft. conveyor trucks and cranes with 4 yd buckets. We were a small company and this was without question the biggest pour we had ever done. There was also 450 yds of class C concrete underneath to bring the subbase up to bottom of footer grade. I sometimes miss the big projects.



Thomas

 

[JCoffey]

I do not think they were building anything. It was a STING operation to catch illegals. They had billboards up for blocks around saying they were hiring concrete finishers. :-laf:-laf

 

[JFlagg]

I wonder how many plants this tied up for the day, a lot of times they'll put one right on site for jobs this large however given the amount of concrete and short period of time, a plant large enough may not be economical unless your doing pours like this often enough. No doubt this little pour cost a lot of other contractors some money because they could not get any concrete this day. The excuse from the concrete company went something like this... ... .....



" Our plant broke down... . "

"We ran out of cement, we'll get a new batch this afternoon"

"We bought our cement from our competitor and it is not up to spec..... "

"We had three trucks break down... ... . "

"We had three drivers lay out... ... ... ... "

"You ordered concrete today? We don't have you in the computer. "

"Our computers crashed last night and we lost all of today's orders... "



A recent addition to the list.



"You have reached your quota for the week, due to a shortage of materials you will have to wait until next week. . "



:-laf:-laf:-laf:-laf

I'm in the STL Laborers Local 110 and I've heard every single one of those excuses!:-laf Wonder if those finishers and laborers will make the same statement my Dad told me once, "Son, I've poured more concrete than most people have ever walked on". After 30+ years in the business, I believe him...

 

[p-Bar]

Just talked to one of my buddies who gave me the low down.

the company was Moosa not sure about the spelling , they used 4 batch plants each plant can produce about 300 yds an hour. figure the concrete was at least 120. 00 a yard 1,380,000. 00 .