PQC laying guidelines as per MoRTH section 602 and IRC guidelines

Rigid Pavement Construction Flowchart with IRC & MoRTH References

flowchart TD A1([Start
Ref: IRC:15 Intro]) A2["Subgrade Preparation
• Achieve 97% MDD
• Remove soft pockets
Ref: MoRTH 305, IRC:15 Cl. 5.1"] A3["DLC Placement
• 10–20 MPa
• Min 100 mm thick
• Compacted with roller
Ref: MoRTH 601, IRC:SP:62"] A4["DLC Curing
• 7 days minimum
Ref: IRC:SP:62 Cl. 7"] A5["Surface Cleaning
• Remove dust & laitance
Ref: MoRTH 602.4.1"] A6["Polyethylene Sheet Laying
• 125 micron
• Joints overlapped 300 mm
Ref: MoRTH 602.4.2"] A7["Dowels & Tie Bars Placement
• Epoxy-coated
• Dowel tolerance: ±5 mm
• Tie bars as per IRC:58 Table 10
Ref: IRC:58 Cl. 10"] A8["Side Forms / Slipform Setup
• Level tolerance ±3 mm
Ref: MoRTH 602.5"] A9["Concrete Batching & Mixing
• w/c ratio per IS 10262
• Use IS 383 aggregates
Ref: MoRTH 602.6, IS 9103"] A10["Concrete Transport
• No segregation
• Place within 30 min
Ref: MoRTH 602.7"] A11["Concrete Placement
• No vibration on dowels
• Spread uniformly
Ref: MoRTH 602.8"] A12["Compaction with Vibrators
• Internal & surface vibrator
• Avoid over-vibration
Ref: IRC:15 Cl. 8.3"] A13["Surface Finishing
• Texturing with burlap or broom
Ref: MoRTH 602.9"] A14["Alignment & Level Checks
• Straightedge check 3 m
• Max 3 mm deviation
Ref: IRC:15 Cl. 10"] A15["Joint Cutting (Grooving)
• 1/3 slab depth
• Saw-cut within 6–24 hrs
Ref: IRC:58 Cl. 11.3"] A16["Joint Sealing
• Sealant Type: Polysulphide
• Reservoir cleaning required
Ref: IRC:57 & MoRTH 602.13"] A17["Curing of PQC
• 14 Days minimum
• White curing compound allowed
Ref: IRC:15 Cl. 11"] A18["Opening to Traffic
• Strength >= 30 MPa
• Min 28 days unless permitted
Ref: IRC:15 Cl. 12"] A19([End]) A1 --> A2 --> A3 --> A4 --> A5 --> A6 --> A7 --> A8 --> A9 --> A10 A10 --> A11 --> A12 --> A13 --> A14 --> A15 --> A16 --> A17 --> A18 --> A19