Today, massive industrial centers are running 24/7, subject to hard-wheeled traffic around the clock, creating the demand for a control joint filler product that could meet the load transfer demands of today’s equipment while still protecting joint edges. SpecChemToday’s expansive distribution and warehousing industries have grown far beyond what existed thirty, forty, or fifty years ago. As the slab continued to shrink, the “welding” would prevent the joint from opening, causing random stress cracking to occur in the slab.Īfter the application pictured here is what a control joint on warehouse floor should look like. The industry then over compensated with rigid, high-strength epoxy-based products that’ while offering outstanding joint edge protection, welded the slab panels together. As decades passed, improvements in equipment and machinery produced hard wheels on pallet jacks and fork lifts, which started impinging on the exposed joint edges, causing spalling to occur. In the early days of control joints, various soft or very flexible materials were used to fill control joints, if the joint was even to be filled at all, primarily to keep debris and contaminants out of the joint. Joint filling products have evolved closely with the evolution of the warehousing and distribution industries, forklift and machinery technologies, and the technology behind the products and materials used to fill joints. SpecChemConcrete control joint fillers have quite a history. Control joint fillers - evolutionĬontrol joint fillers are flowable and easy to apply with consistency. And while most shrinkage occurs within the first year, a concrete slab can continue to shrink and move for years.Īny interior concrete, anything from residential slabs to decorative applications to commercial and industrial floors will utilize control joints. Random cracking results in a slab that is not only unattractive, but challenging to maintain. In indoor construction, crack fillers have evolved to transfer floor loads between slabs and protect the slab edges from spalling. Think of it as a “planned” crack a joint cut into a slab to ensure that as the concrete slab continues to shrink, cracks occurring will do so in a straight, maintainable line at the joint, below the finished concrete surface, as opposed to randomly throughout the slab.
A control joint (or contraction joint) is intended to induce cracking in a concrete slab.
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