Flow Chart - Bituminous Mix Design of DBM & BC

FLOW CHART FOR BITUMINOUS MIX DESIGN OF DBM & BC

flowchart TD %% === START === A["Test of Bitumen:
As per IS 73:2013 / IRC SP 53:2010"] B["Collection of Aggregate Samples
and Bitumen Samples"] C["Tests of Coarse and Fine Aggregates:
Sieve Analysis, L.A Abrasion, Impact, Flakiness & Elongation, Coating & Stripping etc."] D["Test of Filler:
Gradation, PI"] E["Blending of Coarse, Fine Aggregates and Filler
to Arrive at Specified Gradation"] F["Arriving at Aggregate and Filler Proportions
based on Blending"] G["Heating Bitumen & Aggregates Separately for Marshall Specimens
(as per IRC 111:2009, 1150–1250g dry aggregate)"] H["Mixing Aggregate & Bitumen (Temp Diff ≤14°C)
Prepare Marshall Specimen – 75 Blows on Each Side"] I["Repeat for Different Bitumen Contents
at 0.5% Intervals (Min 3 per Content)"] J["Extrude Specimen and Measure
Thickness & Specific Gravity"] K["Test Marshall Specimens at 60°C ±1°C for 30 min
Measure Stability & Flow"] L["Analysis: Plot Curves
Bitumen Content vs Stability, Flow, VIM, VFB, VMA"] M["Determine Optimum Bitumen Content (OBC)
Based on Stability, Flow, VIM, VFB, VMA"] N["Check OBC with Specification Requirements"] O["Prepare Job Mix Formula (JMF):
Coarse %, Fine %, Filler %, Bitumen %"] P["Use JMF in Hot Mix Plant"] %% === Connections === A --> B --> C --> D --> E --> F --> G --> H --> I --> J --> K --> L --> M --> N --> O --> P %% === Subgraphs === subgraph Material_Testing ["MATERIAL TESTING & GRADATION"] B C D E F end subgraph Marshall_Preparation ["MARSHALL SPECIMEN PREPARATION"] G H I J end subgraph Testing_Analysis ["TESTING & ANALYSIS"] K L M N end subgraph Output ["JOB MIX FORMULA"] O P end %% === Class Definitions === classDef title fill:#f0f0f0,stroke:#d9d9d9,stroke-width:1px,font-weight:bold; classDef standard fill:#e6f7ff,stroke:#1890ff,stroke-width:1.5px,rx:6px,ry:6px; classDef process fill:#fff7e6,stroke:#fa8c16,stroke-width:1.5px,rx:6px,ry:6px; classDef output fill:#f6ffed,stroke:#52c41a,stroke-width:1.5px,rx:6px,ry:6px; classDef analysis fill:#f9f0ff,stroke:#722ed1,stroke-width:1.5px,rx:6px,ry:6px; class A title; class B,C,D,E,F standard; class G,H,I,J process; class K,L,M,N analysis; class O,P output;

Note: VIM = Voids in Mix, VMA = Voids in Mineral Aggregate, VFB = Voids Filled with Bitumen