Professional Concrete Expansion Joint Repair
Expansion joint lifecycle
Expansion joints are cuts or divisions in concrete slabs used to reduce cracking. This is different from control joints that are simply grooves or shallow cuts that manage cracks in controlled ways, hidden in the joint rather than randomly across the slab. You see both expansion joints and control joints as the gaps that seem to separate each concrete panel from the next, or that may divide up a large slab into smaller parts. Expansion joints allow the concrete as it heats up or cools down to expand or contract without cracking adjoining slabs.
As they are deep, expansion joints are typically filled with some material. This filling of expansion joints is for two reasons; 1) It keeps the gap between concrete slabs from becoming a safety hazard. High heels, canes or small children’s shoes can get caught causing a fall and injury, 2) the filling material keeps water from pooling in the joint and causing the concrete on either side to degrade and break down.
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How experts repair expansion joint gaps
PRECISION Trip Hazard Removal has performed expansion joint repair tens of thousands of times for cities, schools, parks, apartment complexes and HOAs in San Diego County, Imperial County and Temecula.
Our professional process involves clearing the expansion joint with a concrete saw to remove remaining filler material and debris. If this is not done thoroughly then the longevity of the new expansion joint repair will be compromised and it will begin to come apart and degrade faster than it should. Depending upon the expansion joint material used and the weather this material may last less than a year or a decade. Once the expansion joint is property cleaned and dry, PRECISION uses a a self-leveling, premium-grade polyurethane sealant with an accelerated curing capacity to fill the gap and sprinkles a top layer of sand on top that extends the life of the sealant by retarding sun damage. The result is a flexible filler that repairs the expansion joint while blending in more with the surrounding concrete.
Wood boards are placed on top of the expansion joint repairs, protecting them from being disturbed till the sealant fully cures in a day or two. During the curing time. your people can walk on the boards normally. Our technicians then return and remove the boards and the expansion joint repair is complete!