Need concrete advice

[mminter1973]

are you saying pour the footers separate from the pad? Will the pad adhere to the footers if they are already dry?

 

[pismojim]

Get him to PLACE the footers

fixed it for you
Hehehehe


OK I'll be quiet. Carry on...


For your entertainment...

Third pic of bearing pads with insulated blankets with a string of incandescent light bulbs underneath. 55+ degrees maintained.

 

[pismojim]

Didn't like this approach so much, especially with the 45mph wind.

 

[Arya Ebrahimi]

fixed it for you
Hehehehe


OK I'll be quiet. Carry on...

I was wondering when I was gonna get called out on that. I grew up with people "pouring" concrete, and while a couple of my more anal professors tried to beat it into our heads that concrete is placed, not poured, it never really stuck. I've never heard anyone say place concrete in the field, only pour. But you're right, he should "place" the footers ;p

For your entertainment...

Third pic of bearing pads with insulated blankets with a string of incandescent light bulbs underneath. 55+ degrees maintained.

How well does the string of lights under the blankets work? Hadn't heard of that, but I LOVE the idea. Any idea how frequently the lights were spaced to be that effective?

Thanks

 

[trainrech]

Just poured a bridge deck today in Dodge City, KS. No accelerators were used. A little late start as we had to melt some snow and ice off of the rebar and forms from a storm earlier in the week. We are good with blankets only until Monday when the lows hit the teens and highs may hit 30. We will be using a Thawzall (ground heater) to keep the deck warm until Wednesday when our 7 day cure is up.

 

[Arya Ebrahimi]

I've been wanting to use a ground heater to cure our deck, but nobody else seems to want to get on board with the idea.

Anyone have experience using ground heaters on elevated decks where the bottom is completely exposed to the weather below? Sorry for the hijack

 

[trainrech]

More than once, what do you want to know?

Clarification - bottom side of the concrete protected by 3/4" plywood for deck forms.

 

[pismojim]

I was wondering when I was gonna get called out on that. I grew up with people "pouring" concrete, and while a couple of my more anal professors tried to beat it into our heads that concrete is placed, not poured, it never really stuck. I've never heard anyone say place concrete in the field, only pour. But you're right, he should "place" the footers ;p



How well does the string of lights under the blankets work? Hadn't heard of that, but I LOVE the idea. Any idea how frequently the lights were spaced to be that effective?

Thanks

At least you didn't call it a cement truck.

The lights bulbs definitely help, the ground anchors bearing pads were big thick blocks placed direcyly in the ground so it might have been fine without them. The lights were strings used in tunnels with 150 watt bulbs every 5 feet so so.

To continue the hijack, I'm currently scratching my head over a project using ground freezing and secant walls to stabilize a tall vertical cut which will have a concrete retaining wall placed in front of it. Thinking about placing against frozen ground? or formed, backfilled, grouted, etc. All this to protect an existing nearby structure. Interesting stuff.

 

[Arya Ebrahimi]

More than once, what do you want to know?

Clarification - bottom side of the concrete protected by 3/4" plywood for deck forms.

I'm pouring a 4.5" thick composite deck on 2" corrugated metal pan. Wondering if the ground heaters will keep the concrete 55* throughout for the cure period, or if I'd need some sort of tenting/insulation underneath.

 

[Arya Ebrahimi]

At least you didn't call it a cement truck.

The lights bulbs definitely help, the ground anchors bearing pads were big thick blocks placed direcyly in the ground so it might have been fine without them. The lights were strings used in tunnels with 150 watt bulbs every 5 feet so so.

To continue the hijack, I'm currently scratching my head over a project using ground freezing and secant walls to stabilize a tall vertical cut which will have a concrete retaining wall placed in front of it. Thinking about placing against frozen ground? or formed, backfilled, grouted, etc. All this to protect an existing nearby structure. Interesting stuff.

Cement truck.....

Does the wall need to be pretty? I have absolutely no experience with it, but I remember reading in school about bentonite slurry walls, where they would dig a deep trench, filling it with a bentonite slurry to maintain pressure on the adjacent soils, and then pump concrete into the trench, thereby displacing the slurry creating a wall.

That's all I got...

 

[pismojim]

Cement truck.....

Does the wall need to be pretty?

In the eye of the beholder... forgot to mention it's about 50ft from the San Andreas Fault.

 

[trainrech]

I'm pouring a 4.5" thick composite deck on 2" corrugated metal pan. Wondering if the ground heaters will keep the concrete 55* throughout for the cure period, or if I'd need some sort of tenting/insulation underneath.

I don't have much experience with metal pan forming so I'd hate to offer any opinions one way or another on your question.