Visual Survey Tools Defect classification guide Proformas, clip board and rubber bands Pencil, rubber, pencil sharpener Tape measure Wax crayons Hammer for drummy test Pen knife, chipping hammer pH indicator solution Crack gauges Camera Binoculars Torches Chair Breaker/Grinding Core Cutter

Grinding Core Cuts

Crack Measuring Deformation Meter

Deformation MeterCracks are measured at various times• Accuracies ± 0.001mm to ± 0.1mm• Analogue or digital display• 5 mm max. crack width

Crack Monitor • Horizontal and vertical scales• For flat areas & corners• Accuracy ± 0.10mm• Fix with glue or screws

Measuring magnifier •8 x magnification• Up to 15 mm width• Accuracy ± 0.05mm

Crack width meter •10 reduction scales• Up to 5 mm width

Accuracy of Free Crack Comparitor

-40

-30

-20

-10

0

10

20

30

0.1 0.15 0.2 0.25 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.5

Stated Crack Width (mm)

Err

or

(%)