Concrete driveway expansion joint


  #1  
Old 07-06-23, 10:55 AM
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Concrete driveway expansion joint

Hello,

I have a concrete expansion joint where the original material has worn down and needs to be replaced. I've read on these boards and online about filling it in with a caulking material. Has anyone used any options other than the caulk?

I've found some options online for a rubber strip. Here is one option: https://www.amazon.com/Concrete-Expa...33&sr=8-2&th=1

Let me know your thoughts. I am posting a couple pictures as well. Thank you!


This is the expansion joint

You can see the old material
 
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Old 07-06-23, 01:01 PM
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If you live in or near a large city call their engineering department and ask what expansion joint fill sealer meets their approval standards.

It's my understanding that specifications for some large industrial floor areas use a brownish honey colored, almost lacquer-like semi-transparent self leveling material that becomes diamond hard yet doesn't break/crack and withstands movement and heavy use from forklifts, etc. I'm sure places like Amazon, NASA, Tesla, nuclear sites, etc. have their engineering experts test and come up with the absolute best expansion joint filler/sealer to use. If you could tap into that knowledge/information you'd receive the best input.
 

Last edited by Kooter; 07-06-23 at 01:02 PM. Reason: orthography
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Old 07-06-23, 01:18 PM
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Thanks for the advice. I can also do some more digging. This is just for my residential driveway so no heavy equipment...
 
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Old 07-06-23, 01:20 PM
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There are some rubber fillers that may work. https://www.amazon.com/concrete-expa...n+joint+filler
 
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Old 07-06-23, 01:43 PM
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I talked with City of Plano, TX (suburb of Dallas) engineering department and I was told that Polyurea Control Joint Fillers is found to be the best and holds up better in all their test conditions. Their testing over multiple years included suspended pavement, movement that is caused by extreme 100+ and minus temperatures. He said it has been tested on portions of 'The High Five' suspended interchange (image below) here in Dallas.



The 'High Five' Interchange - Dallas, TX
 

Last edited by Kooter; 07-06-23 at 01:58 PM. Reason: orthography
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Old 07-06-23, 05:01 PM
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All that needs is some Sika self leveling sealant, my driveway is full of it!
 
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Old 07-06-23, 05:24 PM
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It seems most of the flexible tube applied filler from big box stores just ends up splitting, cracking, floating out or pulling away over time. It usually stands out from the concrete driveway and draws one's attention to it, which is not very favorable for most people.

You might need to force some backer rod down deep into the joint before using any type of expansion joint filler.
 
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Old 07-06-23, 05:58 PM
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Yes, backer rod is a necessity. After the backer rod is in place you can even use almost any concrete filler or patch. It will last several years.
My driveway is asphalt, and the garage is concrete. Where they meet is a typical area of expansion or separation. Backer rod then concrete patch fixed mine for many years. Nothing will be permanent.
 
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Old 07-07-23, 05:24 AM
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You might need to force some backer rod down deep into the joint
I just pour sand down into the cracks them using a fox tail brush run that along the joint to get a nice 1/2" deep area to fill.

If the slabs are stable I've got joints that are good for many years. If they shift or heave then you are correct they can tear and pull away. For those I just use polymeric sand and touch them up every year!
 
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Old 07-07-23, 07:33 AM
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Spaceace - Look into granite dust to fill your expansion joint gap. Granite dust is highly-compactible and heavy, so it stays in-place nicely and levels out perfectly. Granite dust has a natural look that blends well with concrete so it will not stand out in contrast to the concrete like typical expansion joint filler does. Depending on sourcing It can be found in different colors. I suspect a gray or silver color would be the best color choice to match a concrete driveway.

https://www.homedepot.com/p/Southwes...0-HD/318591298

 
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Old 07-07-23, 07:54 AM
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Kind of pricey, but hey if it works, go for it.
 
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Old 07-08-23, 05:00 AM
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it will not stand out in contrast to the concrete like typical expansion joint filler does
Well that only lasts a week until it gets driven over!

The only problem with any filler, even the polymeric sand, it constently gets blown out of the cracks,
 
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Old 07-08-23, 07:27 AM
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Well that only lasts a week until it gets driven over!

The only problem with any filler, even the polymeric sand, it constently gets blown out of the cracks
Not with decomposed granite, it doesn't!


 

Last edited by XSleeper; 07-08-23 at 07:47 AM.
 

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