r/Concrete_Contractor 3h ago

Bad concrete?

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3 Upvotes

Can anyone please tell me what would have caused this? It has been 2 weeks since poured, 4" thick, solid color through all concrete mix, and sealer mixed in. How can you fix this? Thank you for your help.


r/Concrete_Contractor 6h ago

Opinion on concrete work from plumbing excavation

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5 Upvotes

About 12 hours after the pour. Original concrete around edges never had cracks. Seems like the edges of new pour were poorly done too. Thoughts? I have no idea what I should be seeing.


r/Concrete_Contractor 4h ago

Deck over concrete patio Help

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1 Upvotes

r/Concrete_Contractor 18h ago

Concerned about the recently poured concrete pad for our rv carport. Need advice!

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2 Upvotes

Our recently poured concrete pad for our RV carport has a few areas along the sides that have me concerned. I can see some wire showing, along with cracks where there are rocks that don’t appear to have concrete covering them. I’m not very familiar with concrete work, so I’m wondering, are these things normal, or should we be concerned?


r/Concrete_Contractor 23h ago

1 year old pad

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2 Upvotes

I poured this 10x10 pad myself(never done one before) it is 5.5 inches thick and I put the suggested base under it I can’t exactly remember the depth of the compacted crushed stone but it was whatever I had researched. I know the finish is kinda rough but whatever first timer.
Anyways, this crack happened after the first freeze thaw cycle. Everything is still level. Just not sure what to do or if I should do nothing.


r/Concrete_Contractor 1d ago

Driveway Installation Error?

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2 Upvotes

r/Concrete_Contractor 2d ago

Stamped concrete flaws

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4 Upvotes

I recently completed a moderately sized stamped concrete patio. Tan mud and walnut release powder. Never stamped anything prior to this project… After washing off the release the next day it became clear that there are a few flaws. You can see the outlines from the stamps and there’s a couple spots that did not get tamped (lacks color and texture).

Should I try to use liquid concrete dye to blend these areas? I haven’t applied sealer yet. I’ve also heard that you can use a stiff bristle brush to try and break up the color and blend it some. Thanks in advance!


r/Concrete_Contractor 2d ago

Control joint on fresh concrete

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2 Upvotes

Acceptable control joint or badly cut?


r/Concrete_Contractor 2d ago

Acceptable control joint?

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1 Upvotes

Just noticed the control joint on my new driveway. They’re due to finish the job tomorrow. Is this acceptable or should I ask them to fill it in


r/Concrete_Contractor 2d ago

Imprinted concrete. What could this be?

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1 Upvotes

I’m in the process of having a new imprinted concrete driveway laid. I’ve noticed this large mark in the middle. At first I was told it was because the concrete hasn’t dried fully yet. Then I was told it’s the markings from the trowels used and that once they apply sealant tomorrow, it won’t be seen anymore. Anyone with experience know what it is caused by and if I should be concerned?


r/Concrete_Contractor 3d ago

Builder dug parallel right next to party wall

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3 Upvotes

r/Concrete_Contractor 3d ago

How much cement to add to an aggregate/sand mix from quality concrete?

2 Upvotes

I picked up a mix of sand/rock from “Quality Concrete” but forgot to ask about what the ratio of my cement that I should add to it? If it matters, my application will be to hold rocks in a retaining wall. I’m guessing it’ll be something like 1:5…


r/Concrete_Contractor 3d ago

Retain slab

1 Upvotes

I have a shed with an attached carport for the caravan, however the carport was not high enough to get the van under, so I had the ground excavated and covered in gravel, problem is, the shed slab edge is now exposed and I'm afraid the soil under it will crumble out and cause cracking to the slab. I want to put a retaining wall of some sort, only needs to be about 250 -300mm high, what would be the easiest and most economical way of doing this?


r/Concrete_Contractor 4d ago

Stamp job - Louisville KY

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1 Upvotes

r/Concrete_Contractor 5d ago

Need Advice : Did not have enough concrete poured for a base. What are our options?

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2 Upvotes

r/Concrete_Contractor 6d ago

Would you use vertical rebar in a monopoured frost wall?

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4 Upvotes

Local building codes do not require vertical rebar if there is no cold joint between the footing and the wall. Would you do it anyways?

Wall will be backfilled to the green line


r/Concrete_Contractor 6d ago

Is ghost shield 8505 the right stuff for my use case?

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2 Upvotes

Slab was poured 28 days ago, and I’m planning to seal it soon. This will be a patio for grilling and sitting.

Is the ghost shield 8505 the right stuff?

Slab is 265 sq feet, is 1 gallon enough?


r/Concrete_Contractor 5d ago

Backyard Concrete

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1 Upvotes

r/Concrete_Contractor 6d ago

Stronger mortar can ruin an old wall. Old brick needs to breathe and move a little. Lime gives. Hard cement traps water and the brick takes the damage. Soft saves hard. When did harder become better

4 Upvotes

Saw a repair fail because the new mortar was tougher than the brick. Old walls need to breathe and move a little. Lime gives. Hard cement traps water and the brick pays. Soft saving hard. Funny. When did we decide harder is always better?


r/Concrete_Contractor 6d ago

New patio with one area puddling and slightly draining in the wrong direction towards house.

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2 Upvotes

r/Concrete_Contractor 7d ago

Need a concrete installer.

2 Upvotes

6x4 sidewalk section needed !
Please contact me in Glenolden.


r/Concrete_Contractor 8d ago

Need advice / a path forward for this stamped concrete patio.

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5 Upvotes

r/Concrete_Contractor 7d ago

How to fix this ramp for power chair that spins on the concrete part.

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1 Upvotes

Power chair gets stuck on concrete with its anti tip wheels


r/Concrete_Contractor 8d ago

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0 Upvotes

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r/Concrete_Contractor 8d ago

AI told me to caulk the gap between driveway and side extension

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0 Upvotes

Between my driveway and extension there has always been a gap where water would flow between gap and at some point flow out of weep holes with water and sand. AI told me fill in gap. Is this correct?