Slab vol 3 - soil impact on slab on grade driveway patio and road
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- เผยแพร่เมื่อ 16 ก.ย. 2024
- This video explains how soil impacts slab performance. The soil type is not as important but the uniformity of the soil is critical for slab on grade, driveway, patio, and road construction.
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When I was first learning the concrete business, my dad would always tell me that a big rule of thumb is your concrete is only as strong as the soil you put it on.
Say no to CRACK, kids.
Thank you so much. Your videos are the most valuable ones. I found nothing similar on TH-cam even those done by the American professionals society. Thanks and keep on. Please describe the best solution for the slab on grade in the cold areas (-30°C). I'm living in Russia. Thanks a lot.
Great video as always professor. Thank you for sharing your knowledge.
Greetings from Serbia
please more videos we love them !!!!
Love your videos!
Just worked on concrete pavments of an air field and your videos on slabs and airports are spot on.
Regards from Israel
Thanks Mr.Tyler
Can you explain more about the CBR .. Californian Bearing Ratio which puts in to practice the compressive strength of slabs on soil?
Coconut coil matting @6 mm thick; place on to cure concrete, great water reservoir to keep concrete saturated.
Excellent!
Thank you.
Awesome info. What timing too! Almost dropped my motorcycle in the mud yesterday outside my shed and decided it’s dumb that there’s not a slab there.
Thanks Tyler for your new video which as always removes the esoteric jargon to make your concepts easy to grasp! My question, what is the effect of putting 4'x8' Styrofoam sheets under the slab, (as is done if radiant heating is put into the slab)? Thank you, Chuck
Thank you monsieur. It was informative
4:33 Love your professorial cry. 😉
Thank you professor
At work I've been designing lots of raft slabs on ground with edge thickening beams. Using software which models lots of springs for soil support, sometimes there is a fairly large magnitude of bending moments in the slab, and more so in the thickening beams, but I often wonder just how realistic these are
Thanks for the video, I learned a lot.
I hope you don’t mind, but I have some specific questions that I can’t find answers to. This refers to soil with a heavy clay content and a attached garage driveway slab with a slope that I think is approximately 12%.
Is the drainage in the area beside a slab important? It seems like common sense that water infiltration under the slab can affect any voids, and that this would reduce the stiffness and stability of the slab. Can you confirm this? What effect does undermining a slab have, and what needs to be done to repair the damages? Does freezing temperatures and frozen ground during excavation next to, or underneath a slab increase or decrease the effects on the slab? Would using large amounts of water to thaw the ground before excavating beside and underneath a slab cause more or less damage?
Any answers would be greatly appreciated 🙏
Is there a thumbs rule to determine k in different soil or does k changes as degree of compaction changes?
Is there a reason for separation between soil and aggregate, (crushed rock/concrete) with a fabric? Also, how does foam under a slab work? Is clearly very uniform, but I would appreciate a video concerning both foam board as well as spray foam under a slab. Good/bad/why??? Thanks Tyler
Very informative videos! Thank you. Is there a source / website to find reputable experienced concrete contractors? I’m in the Dallas, Texas area and about to have our 100’+ driveway replaced. We have this awful expansive clay soil and our existing driveway is cracked and has shifted vertically several inches in many locations.
Are we ever gonna get hard hat stickers?
CONCRETE IS ME
I'm currently on a roadway patch job in a private subdivision - they don't follow DOT - ok with me I'm just here to "document"
The thing is they DO NOT want to remedy the Subgrade
Soooo.. They mill off 6" and it's "pumping" as i suspected
They want to put down 6" of asphalt and call it a day - i am trying my best to convince them to remove the bad subgrade first
But time is money and the neighbors are extremely impatient - Yankee transplants tend to get angry in the South during summertime
How long before the 6" asphalt overlay fails ?? 😂😂
All about dat base.
What if you have a something like a fat clay subgrade below the base? Where can it drain to? And if the location is in a place that gets lots of freeze thaw cycles, what will happen to an open graded base if it is undrained and freezes?
I Love Concrete 😍😍
Can you talk about making reinforced concrete that doesn't crack?
Rock on 👍
Edge loading...Wouldn't a designer use something like monolithic slab where there is a footing under the edges to carry the load (sufficiently reinforced) to account for the load around the edges?
Is the value of 'undisturbed earth' a myth? I would think that undisturbed sandstone would provide more support than undisturbed sand, but an engineer I spoke to didn't seem too interested in the composition of the soil, so long as it is undisturbed.
Dear Concrete Master, thanks for teaching. Could you please tell us about Graphene in concrete? I'm trying to build a 200 year lifetime building with obviously concrete slabs and beams, but can't find how to apply Graphene yet: which graphene type, from which provider, which quantity, how to measure the cost of adding, the impact on the rest of the formula, etc... What do YOU know??? :-)
You can use fiberglass rebar as it doesn't rust
4 to 6" of imported subbase is rare for domestic or residential pavements, most guys wont be doing that.
Thanks for your video, it helps a lot. I have one question, for a large slab on grade, is there a suggested distance for construction joint?
Construction or control joint? Different things.
This is why I’m skeptical of underslab polystyrene insulation. You inherently compromise the primary purpose of the slab but putting a soft squishy plastic pillow under your slab. If you want insulation put it on top of the slab not under it. I suspect in due course we’ll see problems with these.
He said the base uniformity is much more important than the type. Foam would be very uniform.
@@honeytubs won’t be uniform once the oil, diesel and petrol eventually leach through and dissolve the polystyrene.
If your slab is under a chemical processing plant or a internal combustion engine repair shop, certainly, the rules are different. But, if it's under a residence, it's not hard to calculate the load you're putting on the slab and buy insulation boards in the psi strength that matches the load. A single 4x8 sheet of 25 psi insulation board can support over a hundred thousand pounds of evenly distributed load. Very many slabs are larger and support less.
How does the pH of my soil affect my slab if at all?
pH is not that big of a deal but the sulfate content can be a big deal. Watch my videos on sulfate attack for more info.
@@TylerLey thank you! I will !
You didnt touch much on reactive soils.. expansion and contraction
So on mat foundations there are ways to compensate for non-uniform soils. They involve a lot of very tedious algebra. Yuck.
Deep foundations ftw!
Dont use Recycled Concrete aroud homes or under house slabs, this si essentially Building Waste and is down cycling. Just use a Natural stone or rock as your sub base.
Adobe
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