Slab concrete work | concrete work for slab | Slab casting | chhat ki casting | slab pouring trick

Slab Casting Kaise Kare (Step-by-Step Guide)

1. Site Taiyaar Karna (Site Preparation)

Slab casting ke liye pehle site ko theek se clean, level aur compact karna bahut zaroori hai. Debris, vegetation, ya purane material ko hataayein. Uske baad ek stable sub-base—jaise gravel—lagayein(concretenetwork.com, civilguidelines.com).

2. Formwork (Shuttering) Lagana

Wooden, steel ya aluminium formwork banayein jo slab ke size aur shape ke hisaab se ho. Formwork ko accurate alignment, slope, aur strong support ke saath lagaayein jisse concrete leak na kare(concretenetwork.com, theconstructor.org, JK Cement).

Shuttering par release agent bhi laga sakte hain taaki cast hone ke baad forms easily hat sakein(Smart Scale House Design, Wikipedia).

3. Reinforcement (Rebar) Ka Placement

Design ke hisaab se rebar ki grid tayar karein, proper spacing aur cover maintain karte hue. Bar chairs ya spacers ka use kar ke bars ko formwork me sahi position par rakhkar tie karein(civilengineerdk.com, theconstructor.org, Wikipedia).

4. Concrete Mix aur Pouring

Concrete mixing mein sahi proportion (cement, sand, aggregate, water) ka dhyaan rakhein. RMC (Ready-Mix Concrete) bhi use kar sakte hain agar available ho(civilengineerdk.com, concretenetwork.com).

Pouring ko even rakhein—concrete ko ek hi jagah se bahut zyada height se girne se segregation ho sakta hai. Low drop height maintain karein aur sare area mein evenly pour karein(civilengineerdk.com, structuralguide.com).

Vibrator ka istemal karke concrete ko compact karein (air voids hatayein aur strength badhayein)(civilengineerdk.com, JK Cement, theconstructor.org, structuralguide.com).

5. Screeding aur Finishing

Screed board ya bull float se concrete ki surface ko level karein. Uske baad floating aur trowelling se smooth finish deyin. Broom finish ya zyada polish chahiye toh steel trowel se kam karein(concretenetwork.com, Bangur Cement, theconstructor.org).

6. Curing ka Dhyaan Rakhein

Formwork ke hataane se pehle ya uske baad curing bahut important hai. Slab surface continuously moist rakhein—plastic sheet, hessian cloth ya water sprinkling se—kam se kam 7–14 din tak, lekin initial 48 ghante sabse critical hote hain(JK Cement, civilengineerdk.com, dalmiacement.com).

Proper curing se slab mein cracks kam aate hain aur strength achieve hoti hai(dalmiacement.com, civilengineerdk.com).

7. Formwork Removal aur Final Inspection

Jab concrete required strength achieve karle (usually 7–14 days ke baad, design aur conditions ke hisaab se), tab formwork ko carefully remove karein(theconstructor.org, civilengineerdk.com).

Surface inspect karein—cracks, honeycombs, uneven leveling, ya other defects ke liye. Zaroori ho toh patch-up karein aur quality tests (e.g., cube test) bhi kara sakte hain(civilengineerdk.com).

Summary Checklist

StepKey Actions1. Site PreparationLevel, debris-free, compacted sub-base2. FormworkProperly aligned, leak-proof, release agent3. ReinforcementCorrect placement, spacing, tied with cover4. Mixing & PouringRight mix, even pouring, avoid segregation5. CompactionUse vibrator to remove voids6. Leveling & FinishingScreed, float, trowel as needed7. CuringKeep moist 7–14 days, initial 48h crucial8. Formwork Removal & InspectionAfter strength gain, inspect and test

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