There is a big problem with control joints or contraction joints. They are the saw cut joints we cut into concrete slabs to control cracking as the concrete cures. The problem is the floor owner typically wants the floor poured, joints cut, joints filled, and building occupied in 60 days or less. Concrete cures hard in typically 28 days, but it continues to shrink and crack for a about a year. The contraction joint that was 1/4″ when it was cut, can almost double in width in that first year leaving the 1/4″ of joint filler a bit short, cracked and generally a mess. The sidewalls of the joint are left unprotected and the joint spalling begins. You can replace all that gummy polyurea or brittle epoxy with Roadware 10 Minute Concrete Mender™ and leave your control joint problem behind.
Why are my contraction joints spalling and what can I do to stop it? Contraction joints (or control joints) are joints cut into a slab shortly after pouring. The purpose of these joints is to control the cracking of the slab as it cures. Most concrete slabs shrink and sometimes curl…
Use Concrete Mender™ to repair cracks, joints and curling slabs under VCT or tile floors. The permanent performance and 10 minute cure turns this 2 day job into a one day (or one night) job. Keep business running with minimal down time. For spalled or failed control joints that are reflecting…
Roadware Flexible Cement II™ Explained Roadware Flexible Cement II™ is semi-ridged polyurethane for creating flexible bonds between concrete surfaces and other materials. This versatile material may also be used to protect contraction joints from traffic deterioration. What is Flexible Cement II? Proprietary Polyurethane Blend Formulation: Classified Manufacturing: South Saint Paul, Minnesota, USA Origin: Designed…
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7 thoughts on “The Control Joint Problem”
Great education and so true. Roadware concrete products are the best at solving these control joint issues!
Thank you for uploading the video along with your advice. Critical joints are the worst. If you use roadware products like Dave mentioned, you can go a long way in fixing the issue, though.
I appreciate this information about concrete. It is interesting to learn about the control and contraction joint problems. I did not know that concrete cures hard in 28 days but continues to shrink and crack for about a year. Something to continue would be to settle the ground beneath the concrete to try to avoid this cracking.
Hi Kelton,
Really Roadware products are more useful for repairing any concrete work. I like these products. It is more effective for any kind of concrete repair work. Thanks for your wonderful blog.
Great education and so true. Roadware concrete products are the best at solving these control joint issues!
Thank you for uploading the video along with your advice. Critical joints are the worst. If you use roadware products like Dave mentioned, you can go a long way in fixing the issue, though.
Roadware concrete products are the best at solving these control joint issues! and thanks for uploading video
I appreciate this information about concrete. It is interesting to learn about the control and contraction joint problems. I did not know that concrete cures hard in 28 days but continues to shrink and crack for about a year. Something to continue would be to settle the ground beneath the concrete to try to avoid this cracking.
Hi Kelton,
Really Roadware products are more useful for repairing any concrete work. I like these products. It is more effective for any kind of concrete repair work. Thanks for your wonderful blog.
Great video! Thanks for the info!
I didn’t realize concrete could take this long to fully cure. Thanks for sharing this helpful advice on how to fix this problem.