What material is used to repair concrete cracks?

Repair with epoxy mortar, cement mortar and other repair materials, after adding curing agent, it has strong viscosity and adhesion, and it is not limited by structural shape when used. But also has strong wear resistance, is insoluble in water, and has the functions of impermeability, frost resistance and corrosion resistance. The most important thing is that it can be well combined with concrete and is not easy to fall off. Construction is also very convenient, just chisel the concrete cracks into a V-shape, clean up the impurities inside, and then evenly spread epoxy mortar or cement mortar with curing agent on the cracks until it solidifies.