WBPWD/EE/BNWD/NIQ16e/2026-27

Rebound Hammer Test: For detennining the estimated compressive strength of concrete and unifonnity 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: 13 791, also establishing correlation chart between rebound hammer and other confirmatory test for estimated in - situ strength of concrete if required. Note: One point consisting of six readings spread over six cubicle in an area of 1 sq.m @ 150 mm interval shall be considered as single point test.

Ultrasonic Pulse Velocity Test: for ascertaining the quality of concrete, uniformity of concrete in terms of soundness and density of concrete as per IS 13311 (Part - I) 1992, ASTM: C597 - 83 BS 6089: 1081 and BS 1881: Part 203, BSEN:13791, Note: RCC members of the structure covered under the study by making 300 mm*300 mm C/C grids to know about the homogeneity and quality of concrete.

Core Extraction and Testing Extracting the concrete core samples following the coda! provisions: and evaluating the propertise (fck value, grade of concrete) in the laboratory from the core samples selected IS 456:2000: IS 516: 1959, IS 1199:2002; ASTM C - 42, without encountering any steel reinforcement from the RCC members covered under the study at specified locations by site in - charge with portable power driven core cutting equipment.

Half cell Potentiometer Test