EK275
Main cracks develop at a later stage than secondary cracks. They are caused by difference in strains in steel and concrete at the section considered.
EK271
There are three types of secondary cracks: shrinkage cracks, secondary flexural cracks and secondary corrosion cracks.
EK270
Secondary cracks, very small cracks that develop in the first stage of cracking, are produced by the internal expansion and contraction of the concrete constituents and by low flexural tension […]
EK269
In general, concrete cracks may be divided into two main types: secondary cracks and main cracks.
EK118
A reinforced concrete beam will initially behave elastically throughout, as the applied uniform moment is increased. When the limiting tensile strain for the concrete is reached a crack will form, […]