Crack monitor
Crack monitors are used for the qualitative and quantitative recording of changes in cracks (differential measurement ). The deformation can be read directly through the arrangement of a crosshair over a line grid. In contrast to plaster marks , which are often incorrectly applied, installation using dowels or glue is faster, easier and safer. However, the purchase costs of the crack monitors are significantly higher than the costs for plaster, but are put into perspective by the multiple use. Crack monitors can also be installed over wide cracks or planned structural joints.
There are crack monitors for the observation of cracks in the plane, in corners as well as for the horizontal offset.
The documentation is usually carried out using photos that show the position of the crosshairs over the line grid.
literature
- Niemeier, W., R. Stratmann, C. Fraser, H. Neuss, B. Riedel, E. Ziem: Crack Monitoring in Modern Building Maintenance. Test engineer 31 (10), 2007, pp. 51–59.
Individual evidence
- ↑ J. Lange, W. Benning (2006) Method for crack analysis in concrete components ; Geodetic Institute, RWTH Aachen, Germany Online ( Memento of the original from June 30, 2007 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
