Non-destructive testing and related works of RCC and Steel Civil structures at Heavy Water Plant Kota.

Amount

Visual inspection for surface damages, flaking, coloration, local weaknesses, etc and their damage classification. chisel and hammer, etc shall be used for measuring the distresses. The visual inspection shall largely cover areas of high distress, abnormal variations in structure, Visual inspection would be documented in the form of worksheets, photographic records, and distress over drawings etc. Note: 1. For complete work, Scaffolding shall be provided by the department free of cost to the contractor. 2. For complete work, Water and electricity shall be supplied free of cost to the contractot to the nearest point which shall futher be extended by the contractor to the working site at his own cost.

Vibration Analysis : Probable effect of vibration on health of building to check whether the structure of the building is suitable for the planned operation, to observe the vibration is under limit or not, determination of Vibrating frequency of the structure and natural frequency of the structure for the safety analysis of the structure against the forced vibration as per IS 1893, IS 2974, DIN 4150-1984, BS:7385-1993 or as per relevant Indian Standards (latest revision)/applicable standards. (for 15 structures)

Rebound Hammer Test: For determining the estimated compressive strength of concrete and uniformity of concrete in terms of surface hardness as per IS 516 (Part 5/Sec 4) : latest, ASTM C 805-02, BS 6089:1981 and BS 1881: Part 202, BSEN:13791 or as per relevant Indian Standards (latest revision)/applicable standards, also establishing correlation chart between rebound hammer and other confirmatory test for estimated in-situ strength of concrete if required

Ultrasonic pulse velocity test: for ascertaining the quality of concrete, soundness and density of concrete, uniformity of concrete in terms of density as per IS 516 (Part 5/Sec 1) : latest, ASTM: C597-83, BS 6089: 1981 and BS 1881: Part 203 and BSEN:13791 or as per relevant Indian Standards (latest revision)/applicable standards.

Resistivity meter test: it is used in determination of estimation of likelyhood of corrosion. Indication of corrosion rate, correlation to chloride permeability, determination of zonal requirement 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 or as per relevant Indian Standards (latest revision)/applicable standards.

Chemical analysis of concrete powder sample collected from the structure's concrete core sample/by drilling to understand the chemical deterioration/degradation of concrete and its effect on reinforcement corrosion in the laboratory to determine the following parameters:

Water Soluble Chloride Content % (by of mass of concrete) to check the risk of corrosion due to present chloride % as per IS: 14959 (Part 2) – 2001, B.S. 5328 Part 1, ACI 201.2R-92, BS 1881 Part 124:1988, BS 8110, IS 456:2000 or as per relevant Indian Standards (latest revision)/applicable standards.

pH Value (to check alkanity of concrete) as per relevant B.S. 5328, ACI 201.2R-92 and ACI-318-99, IS 456:2000, BS 8110 or as per relevant Indian Standards (latest revision)/applicable standards.

UT Thickness for Steel Section Size Assessment:- local thickness of a solid/hollow element based on the time taken by the ultrasound wave to return to the surface as per ASTM E797 / E797M or as per relevant Indian Standards (latest revision)/applicable standards for section detailing of steel members including mentioning of classification of corrosion rate of structures based on their comparison with previous available data for the same location.

Liquid Penetrant Testing Ferrous and Non-ferrous Metals as per ASME Sec-5, 2001; ASTM-E165 or as per relevant Indian Standards (latest revision)/applicable standards Flaws open to surface for the condition assessment of joints/weldings/surface cracks.

Preparing and submitting comprehensive report consisting of findings from visual inspection, test data, interpretation of results, conclusions including residual life assessment of structures including mentioning of classification of deterioration/ corrosion rate of structures based on their comparision with previous available data for the same location and final recommendations along with sketch indicating the location of the test.

Repairing Methodology and retrofitting scheme 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.

B.J.MEHTA ARCHITECTURAL & STRUCTURAL CONSULTANTS PVT. LTD. (BID ID -3246410)

Epicons Consultants Pvt Ltd (BID ID -3246150)