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| 1 | VISUAL SURVEY |
| 2 | Visual inspection for surface damages, cracks, flaking, coloration, local weaknesses, etc and their damage classification. Simple tools and instruments like camera with flash light, magnifyingglass, binoculars, gauge for crack 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 drawings etc |
| 3 | REBOUND HAMMER TEST |
| 4 | For determining the estimated compressive strength of concrete and uniformity of concrete in terms of surface hardness as per IS: 516 (Part5/Sec. 4): 2020, also establishing correlation chart between rebound hammer and other confirmatory test for estimated in-situ strength of concrete if required. |
| 5 | ULTRA-SONIC PULSE VELOCITY TEST |
| 6 | Conducting Ultra-Sonic Pulse velocity (UPV) test at selected locations on RCC members of the structures covered under the study by making 300 mm x300 mm c/c grids to know about the homogeneity and quality of concrete. The test shall be performed as per IS: 516 (Part5/Sec. 1): 2020. |
| 7 | ELECTRICAL RESISTIVITY METER TEST |
| 8 | It is used in determination of Estimation of the likelihood of corrosion, Indication of corrosion rate, Correlation to chloride permeability, Determination of zonal requirements for cathodic protection systems, Identification of areas within a structure most susceptible to chloride penetration as per BS EN 12696:2000, RILEM TC-154, AASHTO T277 RCP, AASHTO T259, ASTM C 1202 97 |
| 9 | CORE TEST |
| 10 | Extracting the concrete core samples at select locations from RCC members of the structures covered under the study and evaluating the properties fck value, grade of concrete in the laboratory from the core samples selected. IS 456:2000; IS516:1959, IS 1199:2002; ASTM C-42, without encountering any steel reinforcement from the RCC members at specified. |
| 11 | PH VALUE TEST (FOR ALKANITY OF CONCRETE) |
| 12 | As per relevant B.S. 5328, ACI 201.2R-92 and ACI-318-99, IS 456:2000, BS 8110 |
| 13 | CARBONATION TEST |
| 14 | Measurement of carbonation depth by phenolphthalein spray test at selected locations on RCC members of the structures covered under the study to see the depth of carbonation as per BS EN 14630:2006, BS EN 13295:2004. Ration of Carbonation depth to cover depth is also measured to check the intensity of carbonation attack on steel bar. |
| 15 | COVER DEPTH MEASUREMENT |
| 16 | Conducting cover meter test at selected locations on RCC members of the structures covered under the study to see the adequacy of concrete cover to rebars and creation of Contour Mapping of cover depth in RCC Structure by using (working on Magnetic field generation concept) steel bar scanner as per IS:456:2000 and relevant code of particular structure. |
| 17 | HALF CELL POTENTIAL TEST |
| 18 | Measuring the Half Cell Potential readings with wheel electrode at the nodes of pre-marked grid points on concrete surface in a suitable grid for determining the probability of corrosion activity of embedded steel reinforcement in concrete with specified half cell electrode in accordance with ASTM C876-1980 after moistening the concrete surface with water. The rate shall include surface preparation, moistening concrete surface for assessing the percentage risk of corrosion in reinforcement, Measuring the half-cell / surface potentials at selected locations on RCC members of the structures covered under the study to understand the extent of reinforcement corrosion and contour Mapping of corrosion, Plotting the half cell potential readings in graphical presentation with potential contours plotted in terms of probable risk of corrosion of steel bar as per ASTM C876 [6]-1991 |
| 19 | REPAIR METHODOLOGY |
| 20 | Repairing Methodology for structural serviceability and safety, periodic maintenance scheme, futuristic protection of structure. The recommendation for structural repair and rehabilitation to the structures shall have detailed technical specifications, materials to be used and design details, vulnerability indices and order of urgency to repair along with submission of Appriximate Estimate, rate analysis & supporting quotations for all items of work etc. all complete and all as per direction of EIC / PM / CCE. |
| 21 | STRUCTURAL STABILITY ANALYSIS THROUGH STAAD PRO |
| 22 | To check the vulnerability analysis, structural deficiencies and structural stability analysis of overall structure, In the structural analysis of existing structure, we will use the results of NDT & STAAD of the materials/available properties of existing materials. |
| 23 | REPORT AND INTERPRETATION (FOR 04 TOWERS) |
| 24 | Preparing and submitting of comprehensive report consisting of findings from visual inspection, test data, interpretation of results, final conclusions and recondenation along with detailed drawings,sketch indicating the location of the test. The cost shall include the cost of multiple site visits (including fee, boarding & lodging charges) & vetting charges by IIT or any reputed Institution approved by Department. Also recommend the name of the reputed rectrofitting agencies having credential and expertise in respective fieldto carry out all such kind of Structures / Buidlings . |
