The 'construction joint' in RC structures is treated with water-stop when:
Choose the correct answer
Only in decorative facades
In water-retaining structures (tanks, basements) — PVC/rubber water-stop prevents water seepage through construction joints
All construction joints regardless of use
Only in earthquake-resistant columns
Correct Answer
B. In water-retaining structures (tanks, basements) — PVC/rubber water-stop prevents water seepage through construction joints
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Construction joints: planned stopping and restarting of concrete placement. In water-retaining structures (tanks, basements): joints must be water-tight. Water-stop (PVC or rubber profile) embedded at joint centre — when concrete poured on both sides, water-stop provides mechanical barrier against water seepage through joint. Types: centre bulb (most common), dumbbell. IS 3370 requires water-stops for liquid-retaining structures.
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