Bs 8007 [HOT] Crack Width Examples
in concrete structures, cracks occur when stresses in the material exceed the compressive strength of the material. stress can be applied to the structure in any number of ways, such as by impact, shrinkage, or deformation. stress can be caused by shrinkage, loading, or any other possible cause.
Bs 8007 Crack Width Examples
cracks are an indication of failure of a material. however, cracks in concrete do not necessarily indicate a structural failure. some cracks can be caused by shrinkage and others can be caused by lack of adequate water content in the concrete. if cracks in concrete are not further inspected, the cracks may lead to a structural failure.
acoustic emission (ae) is a non-destructive testing (ndt) method for the detection of micro-cracking in concrete. it is based on the principle that the acoustic emission (ae) waves generated by the micro-cracks in the material are recorded using a microphone.
in concrete, the generation of microcracking is a common phenomenon that occurs during the early stages of concrete construction. for example, as the concrete is being placed in a form, the stress exerted by the shaper tends to break the original aggregate in the concrete.
internal chemical reactions occur in concrete as a result of chemical reactions that are not initiated by external factors, e.g. temperature change. these reactions are more difficult to detect than other types of cracks, and pose the risk of deterioration of the concrete.
lateral loads are those loads that are applied in a direction normal to the main load. these loads are more difficult to detect than other types of cracks, and pose the risk of deterioration of the concrete.