#contraction joints

[roadware]

Heavy Duty Contraction Joint Rebuild Application For High Traffic Areas

Using Roadware 10 Minute Concrete Mender. Remove loose material and create a shelf on both sides of the joint with a minimum profile of 1.5” deep and 2” wide on each side. Vacuum and thoroughly remove dust and contaminates. Create a repair base by filling repair area halfway to grade with bulk mixed 10 Minute Concrete Mender™ combined with 10-20 grit silica sand. Use a ratio of 1 Part mixed…

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[roadware]

The Control Joint Problem

The Control Joint Problem

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.…

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