Cracks in Concrete

Cracks in concrete are a common issue influenced by various factors. According to Layang (2022), cracks are unavoidable but can be controlled in size. They are categorized into non-structural and structural types, caused by factors ranging from material properties to external loads. Abou-Zeid et al. (2007) explain that cracks can signify both minor and major structural issues, emphasizing the importance of addressing the underlying causes to ensure durable repairs. Uno (2011) highlights that cracks in freshly placed concrete have been a persistent problem since ancient times, with steel reinforcement only mitigating but not eliminating the issue. Reinhardt and Walraven (1982) focus on cracks due to shear stress, finding that concrete quality and reinforcement ratio significantly influence crack behavior. Lastly, Cockerell (2005) introduces a method to deliberately form cracks using specific tools to control the location and nature of cracks in concrete slabs. See our Policy regarding Cracks.

A hairline fracture in a concrete slab is a very thin crack that typically does not affect the structural integrity of the slab. These fractures can occur due to several reasons, including shrinkage during the curing process, thermal expansion and contraction, or minor settling of the foundation. While often considered minor, it is essential to monitor these cracks to ensure they do not expand or indicate more significant underlying issues.