How to Use a Crack Measuring Device



Using a crack measuring device is one way to determine the overall integrity of a material like concrete. There different crack measuring devices are available to ensure proper measurement and accurate data collection. A good crack measuring device should be able to help you diagnose problems with concrete, so you can think of the most appropriate ways to remedy them. Here are ways to use some commonly used crack measuring devices:

Digital position strain gauge deformation meter
This device has a digital dial gauge attached to a bar. A conical point is fixed and mounted at one end of the bar, while the moving conical point is on a knife edge pivot on the other side. Pre-drilled stainless steel discs, are attached to the structure with an appropriate adhesive, are positioned using the setting bar. The gauge's conical points are inserted into holes in the discs when a reading is required, and the dial gauge's strain measurement is noted. This way, strain changes occuring in the structure are transformed into a change in the dial gauge's reading.

Crack width metre and crack monitor
You can conduct a visual survey to measure crack sizes with a crack width metre. It looks like a specialised ruler with graduations ranging from 0.1mm to 2.5mm for ease of inspection. The metre also serves to compare cracks. However, if you need to measure rotation cracks, you may need a crack monitor. It can measure both longitudinal and transverse movement for your convenience.

Measuring magnifier
The widths of the cracks in most concrete structures are typically limited to 0.2mm or 0.3mm. Hence, a cost-effective measuring magnifier may suffice for determining whether cracks have already exceeded the limit. A good magnifier should offer up to 10x magnification, a 32mm field of view, and a 20mm x 0.1mm measuring range. Consider using a measuring magnifier that can provide measurements in shaded environments.
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