Flow Chart - Construction of GSB

flowchart TD %% --- PRE-CONSTRUCTION STAGE --- A(["Start"]) --> B["Identification of Source by Contractor"] B --> C["Collection of Sample (Quarry Area)"] C --> D["To be witnessed by CSC"] D --> E["Test for Sieve Analysis, Water Absorption, Flakiness & Elongation Index, AIV, Sand Equivalent"] E --> F{"Meets Specification?"} F -- No --> G["Reject the Source"] F -- Yes --> H["Mix Design\n(Sieve Analysis, Blending Proportion as per Grading, At MDD & Soaked CBR)"] H --> I{"Mix Design OK?"} I -- No --> G I -- Yes --> J["Approve the Source for Usage"] J --> K["Collection of Sample from Approved Stockpile"] K --> L["Mixing at Yard Site using Mechanical Equipment"] L --> M["Field Moisture Test"] M --> N["Spreading to required Grade & Watering"] N --> O["Rolling at +1% to -2% below OMC (minimum 8 passes)"] O --> P["Check for Completion of Earthwork (Scarify if needed)"] P --> Q["Field Density Test"] Q --> R{"Meets Required Density?"} R -- No --> S["Scarify, Rewater & Re-roll"] S --> Q R -- Yes --> T["Approved for Next Layer"] T --> U(["End"]) %% --- Alternative Path if Fails in Testing Phase --- J --> V["Send I.T.D. Sample to Lab for Testing"] V --> W{"Test Results OK?"} W -- No --> X["Suggest Suitable Remedy (Screening, Blending, or Stabilization)"] X --> K W -- Yes --> K %% --- Style Definitions --- 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,H,J,K,L,M,N,O,P,Q,T,U,V process; class F,I,R,W decision; class G,X,S fail;