Browse Forums Paving & Concreting Re: Surface cracks immediately in new concrete driveway 4Jan 22, 2021 7:06 pm Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Surface cracks immediately in new concrete driveway 5Jan 22, 2021 7:39 pm Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Surface cracks immediately in new concrete driveway 8Jan 22, 2021 10:22 pm Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Surface cracks immediately in new concrete driveway 9Jan 22, 2021 10:51 pm Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Surface cracks immediately in new concrete driveway 11Jan 23, 2021 1:26 am Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Surface cracks immediately in new concrete driveway 13Jan 23, 2021 9:13 am Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Surface cracks immediately in new concrete driveway 16Jan 23, 2021 10:16 am moudzj chippy moudzj Control joints don't prevent shrinkage, they localise and control them. No amount of control joints would've fixed or prevented this at all. I think, and am quite certain that these shrinkage cracks are due to a lack of water if anything, in contrary to what others are saying here. There's no way excess water would cause these on day 2 absolutely no way, it's very clearly dried out. Your issue is that there wasn't enough water in the mix on the hot day. Moreover, if there was no plastic/vapour barrier beneath the slab, the ground would've sucked absolutely all of the moisture out of the slab - this is what I think most likely happened. Concreter could've soaked the ground prior to placement to prevent this. I'm very shocked at the reasons some here have listed, really makes me wonder. I'm shocked you don't know that excess water in the mix is one of the prime causes of shrinkage cracks. And yes control joints were never going to save this job as the cracks were already there as I also said. They are called control joints for a reason and cutting them 3 days later is absolutely useless as hairline cracks will have already formed and would continue to open over time. As the cracks were there immediately after finishing there are a number of possibilities. Grano workers much prefer a wet mix over a dry stiff mix because it is easier to work with particularly if it's going to be hot hence the reason it's the most logical basis for the problems the OP is showing. Really there are any number of reasons for the issue's seen here. Failing to wet down the sub-base is one. Heat and wind drying the concrete too rapidly is another. Working the concrete to early is another and all of this can be exacerbated by to much water in the mix. The below article explains what some of the issues could be but unless you see the delivery dockets for the concrete and actually saw the placement and conditions we are all just basically guessing. Having worked with Grano workers I know where I'd put my money. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Its easy to pick a piece off google, mate. Excess water might be the primary cause in your world, and in the article you hand picked, but not in actuality. Google more, you might learn something, this time try drying shrinkage. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Stick to what you know pal. Only a fool would attribute cracking on the same hot day to excess water. Just for clarity moudzj here is the conclusion of your Holcim article. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ There are a number of reasons cracks occur. Whatever the reason I certainly wouldn't be happy with that job and the builders I work with would be having that concrete pulled out and redone. It will only get worse. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Surface cracks immediately in new concrete driveway 17Jan 23, 2021 10:35 am Heeper . I was wondering if I could ask them to redo it at their cost or whether the sealer is sufficient to hide the cracks like they said. There is no mechanism to seek affordable justice such as in other states...Lobby your politicians for a independent building commission Adding water reduces the concrete strength, those cracks will get worse over time, etc, etc. The Sealer just makes the cracking less noticeable when it rains /drys. with time the sealer goes blotchy, fades, deteriorates etc. Not a welcoming reminder as you pull into your expensive driveway. Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Surface cracks immediately in new concrete driveway 18Jan 23, 2021 11:45 am StructuralBIMGuy Heeper . I was wondering if I could ask them to redo it at their cost or whether the sealer is sufficient to hide the cracks like they said. There is no mechanism to seek affordable justice such as in other states...Lobby your politicians for a independent building commission Adding water reduces the concrete strength, those cracks will get worse over time, etc, etc. The Sealer just makes the cracking less noticeable when it rains /drys. with time the sealer goes blotchy, fades, deteriorates etc. Not a welcoming reminder as you pull into your expensive driveway. Thanks mate, and everyone else that replied. So I will attempt to get it redone first. Annoying. Re: Surface cracks immediately in new concrete driveway 19Jan 23, 2021 11:47 am chippy Just for clarity moudzj here is the conclusion of your Holcim article. There are a number of reasons cracks occur. Whatever the reason I certainly wouldn't be happy with that job and the builders I work with would be having that concrete pulled out and redone. It will only get worse. Not the conclusion, a summary. Please read the point above the one you circled - again, you conveniently hand pick a sentences to suit you. OP: Chris hit the nail on the head re sealer, it really wont do you any good in the long term, and wont hide the patching theyd have to do to cover the cracks. Maybe some resurfacing, or stenciling? Re: Surface cracks immediately in new concrete driveway 20Feb 17, 2021 6:01 pm This is always a common problem I hear in the industry, but both parties will always point the finger at each other. Concrete Plant will blame the installer and vice versa. A lot of these cases end up in Fair Trading but never get resolved as it is very difficult to lay blame either way unless you have full documented evidence from manufacture to pour to finish including weather accurate reports and also the depth of the rio in the cement which is also a factor. How have you progressed with the situation ? It will be neat but you won't have much freeboard. At least they are not weep holes. Are you in a high intensity rainfall region? The regulatory slope is only required… 3 8746 You can wash over existing pavers with 10% solution of water and hydrochloric acid, then wash off. The acid will provide for required bond key with new concrete. 1 37327 |