Cracks are the most common early disease of cement concrete pavement and the core starting point for inducing structural damage.
From the perspective of engineering operation and maintenance, pavement cracks can be mainly divided into two categories: one is load type cracks, which are generated by repeated impacts and long-term fatigue effects of vehicle wheel loads, and often develop synchronously with slab bottom detachment and stress concentration; The other type is non load type cracks, which are dominated by the volume deformation of concrete, and the core causes are temperature shrinkage and drying shrinkage.
Chemical shrinkage accounts for a very low proportion and is generally not the main controlling factor.
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