The core hole can often provide a direct path for water to pass through the concrete structure.Ĭonsolidation related surface issues in concrete.Ī construction joint is a break or gap between two slabs of concrete, where two successive slabs are joined together in a concrete structure. When a hole for the service pipe line is drilled through the concrete, the coring process can cause damage to the concrete structure by creating cracks. This pathway allows water to find its way into the gaps and seeps through the concrete around the pipe penetration. The plug does not seal the gaps throughout the whole wall or slab and the bond to the concrete usually fails over time. Pipe penetrations are also sealed with a cement-based plug or a patch from the interior side of the building during the original construction. Once the caps and bolts are removed, the z-bar holes are inserted with cement-based plugs or are patched with sand and cement mix. The old and the new concrete do not intermix and a so-called “cold joint” is formed as a result, creating a weakness in the concrete and a possible passageway for water intrusion.Ĭold joint – Where old and new concrete do not intermix.ĭefects in concrete structures are commonly caused by penetrations through the concrete made for service lines or created by z-bars that are used for creating formwork ties or temporary tie-downs into the concrete. It commonly occurs during construction when one batch of concrete has begun to set before the next batch is added.
#Concrete slab crack repair with shifting how to
We discuss the 7 most common types of concrete cracks, why they occur, their impact and how to fix them.īefore we start discussing cracks in concrete, here is a short list of other common passageways for water ingress in concrete structures.Ī cold joint is the point of connection where old and new concrete meet.
In this article, our focus is on identifying cracks in concrete.
#Concrete slab crack repair with shifting cracked
If you have any questions regarding building defects such as cracked concrete, concrete deterioration and water ingress/seepage, we would love to hear from you!ĭefects in concrete structures – with focus on identifying concrete cracks and how to fix themĭefects in concrete structures can occur during and after construction and different types of defects can form for various reasons.
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