| S.NO | TEST NAME | REFERENCE OF TEST | PURPOSE OF TEST ,TEST RESULT & COMMENT | REFERENCE |
| 1 | Rebound Hammer Test | IS 13311 (Part-2)-1992, ASTM C 805-02, BS 6089:1981 and BS 1881: Part 202, BSEN:13791 | To determining the estimated compressive strength and uniformity of concrete Around 36 test conducted on RCC slab and beams and compressive strength of concrete tested range from M16-M30 Grade of concrete Which is more than M20 as per the latest codal provision of IS 456:2000 | |
| 2 | Ultrasonic Pulse Velocity | IS 13311 (Part-1)-1992, ASTM: C597-83, BS 6089: 1981 and BS 1881: Part 203 and BSEN:13791 | To determine the quality of concrete, soundness and density of concrete. Around 36 test conducted on RCC slab and column and its quality is found to be Doubtful-Good Concrete. Which clearly indicates that there is presence of minor voids/minor cracks inside the concrete which is not exposed on the surface till now | |
| 3 | Half Cell Potential Test | ASTM C876-1980 ,ASTM C876 [6]-1991 | To determine the percentage of risk of corrosion in reinforcement Around 5 test have been performed on RCC beam and slab. It is found out that chances of corrosion is 0%-3% in reinforcement bars As per testing its, clear that the existing reinforcement in members are rusted about 10% of existing diameter of steel | |
| 4 | Carbonation Test | BS EN: 14630 | If depth of carbonation is greater than cover, then incubation period is over; degradation rate will be accelerated. 4 Samples are extracted and its average carbonation depth is found to be less than effective cover. It is in the permissible limits as per Indian Codal provision | |
| 5 | pH Value Test | BS EN 14630 | Around 5 test conducted on RCC slab ,beam and column and its quality is found to be alkaline value | |
| 6 | Cover Depth Measurement | IS:456:2000 | To see the adequacy of concrete cover to Rebars and creation of Contour Mapping of cover depth in RCC Structure. 6 Test were performed on RCC slab, & column& Sufficient Cover is found to be there to all structural members. It is sufficient as per the Indian Codal provision IS 456:2000 | |
| 7 | Core Cutting | IS:456:2000 IS 516:1959 IS 1199-1959: Part 4 BS 1881: Part 4: 1970 ASTM C: 42 – 77 BS EN 13791:2007 | Around 4 test conducted on RCC slab ,beam and column and its quality is found to be M21 value. |
Recommendations :–
1. Central slab area as highlighted need to be dismantle and recast. The new steel will be same as per previous design.
2. Periphery/Low effected slab need to be treated with patch repair as per Repair A and low vicious injection grouting at spacing of 300mm c/c both ways using 12mm NRV nozzles.
3. All the effected beams need to be jacketed by means of RCC jacketing as attached in the report.
4. Some columns need to be treated with patch repair and injection grouting just 1000mm from top area only.
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