IS 8543 : 2019

Code of Practice for Bonded Post-Tensioned Concrete

BS EN 13670
CurrentFrequently UsedCode of PracticeBIMStructural Engineering · Concrete
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Summary

IS 8543 covers construction of bonded post-tensioned concrete — tendon installation, stressing, grouting, and QC. Elongation check (±7%) is the primary quality control during stressing. Grouting quality prevents tendon corrosion.

Construction code for bonded post-tensioned concrete — tendon layout, stressing, grouting, and quality control.

Key Values
Elongation tolerance±7%
Grout w/c ratioMax 0.45
Grout 7-day strengthMin 17 MPa
Practical Notes
! Elongation ±7% is the PRIMARY stressing QC check — stop if outside tolerance.
! Grout within 48 hours of stressing — exposed strands corrode rapidly.
! Grout voids are #1 cause of PT tendon failure — test with ultrasonic/impact-echo.
Cross-Referenced Codes
IS 456:2000Plain and Reinforced Concrete - Code of Pract...
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IS 1343:2012Prestressed Concrete - Code of Practice
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IS 6006:1983uncoated stress-relieved strand for prestress...
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post-tensioningprestressed concretePT slabgroutingstressing