Details: non-destructive testing (ndt) of structures at chp phase- 1 visual survey:- visual inspection for surface damages, cracks, flaking, coloration, local weakness, etc and their damage classification. simple tools and instruments like camera with flash light, magnifying glass, binoculars, gauge for width measurement, chisel and hammer, etc. shall be used for measuring the distresses. the visual inspection shall largely cover areas of high distress, cracks and their location, moisture, leakage, abnormal variations in structure, algae and fungus growth, efflorescence, etc. visual inspection would be documented in the form of worksheets, photographic records, and distress over drawing etc. rebound hammer test:- for dertemining the estimated compressive strength of concrete and uniformily of concrete in terms of surface hardness as per is 13311 (part-2)-1992, astm c 805-02, bs 6089:1981 and bs 1881: part 202, bsen: 13791, also estiblishing correlation chart between rebound hammer and other c
Sector: Mining