Flow Chart - Construction of DBM and BC Layers

flowchart TD %% --- START AND PREPARATION --- A(["Start"]) --> B["Preparation of the base:\nFree from dust & foreign matter (using broom)\nConstruction of shoulder"] B --> C["Application of tack coat (if required)\nCheck weather condition"] C --> D["Mix from Hot Mix Plant"] D --> E["Transporting the mix to the paver"] E --> F["Measurement during paving & recording temperature of the mix\n(as per IRC 111-2009 / MORTH 2013)\nReject if not as per IRC\nThickness of laid mix before rolling\nTemp at shade ≥ 10°C, base not damp/wet"] F --> G["Rolling by 8–10 T smooth wheel roller or vibratory roller\nat 5 km/h speed following close to paver"] G --> H["Intermediate rolling using 8–10 T roller with vibration\nor pneumatic roller of 10–12 T with tyre pressure 0.56 MPa"] H --> I["Finish rolling using 8–10 T smooth wheel roller\nwith pneumatic roller of 10–12 T with tyre pressure 0.56 MPa"] I --> J["Rolling operation from edge to centre\nOverlap by 1/3 width of roller wheel\nRolling till no marks visible & uniform surface seen\nMin 300 mm overlap for pneumatic roller"] J --> K["No traffic allowed until paved mix cools below 60°C"] K --> L["Core cutting operation at every 700 m² interval"] L --> M["Tests on core sample at lab:\nDetermine thickness & degree of compaction\n(≥92% of theoretical max specific gravity)"] M --> N["Check for levels and tolerance:\n–6 mm to +6 mm"] N --> O["Ready for next work"] O --> P(["End"]) %% --- NOTES --- %% Note: BC = Bituminous Concrete, OBC = Optimum Bitumen Content, DBM = Dense Bituminous Macadam %% --- STYLES --- classDef process fill:#e7f0fd,stroke:#4682b4,stroke-width:1px; classDef decision fill:#fff5b7,stroke:#b8860b,stroke-width:1px; classDef fail fill:#fcd5ce,stroke:#d22b2b,stroke-width:1px; classDef pass fill:#d4f8e8,stroke:#2e8b57,stroke-width:1px; class A,B,C,D,E,F,G,H,I,J,K,L,M,N,O process;