Manual on Construction Equipment for Rural Roads

Scope - Key Specifications & Equipment (MORD 19)

Scope covers construction equipment and methods for rural roads, focusing on spreading, mixing, compaction, and surface preparation.

Key Equipment & Usage Summary

Typical Roller Weights for Compaction

Example: Moisture Control & Spreading (Clause 409.5.4)

• Tractor with dozing attachment for spreading.
• Water tanker with sprinkler for moisture control.
• Rotavator/disc harrow/tiller for mixing soil.

flowchart LR
    A[Soil Preparation] --> B[Spreading]
    B --> C[Moisture Control]
    C --> D[Mixing]
    D --> E[Compaction]
    E --> F[Surface Preparation]

For detailed equipment capacities and operations, refer to respective clauses (e.g., 409.5.4, 411.3.2, 501.2.1, 502.4.1).

Key Specifications & Productivity for Earthwork Equipment (MORD 19)

Equipment Selection (Clause 4.3) & Productivity (Clause 1.0 Table)

Additional Equipment & Productivity

Key Specifications & Equipment for Compaction (MORD 19)

Compaction Equipment Types:

Typical Use & Application

• Granular Sub-base/Base: Use tandem vibratory roller or static roller (80-100 kN) in static mode for spreading and compaction.
• Lime/Flyash Stabilized Soil: Use static roller or tandem vibratory roller in static mode.
• Wet Mix Macadam: Use static or vibratory rollers; vibratory plate compactor and rammers for small areas.
• Bituminous Works: Static and tandem vibratory rollers (80-100 kN) for compaction after spreading.

Important Notes from Clause 9.10 (Tips for Compaction Equipment Use)

• Ensure adequate moisture content before compaction.
• Use vibratory rollers for granular and bituminous layers for better densification.
• For small or confined areas, use plate compactors or rammers.
• Maintain roller speed and number of passes as per soil/material type.

Summary Table of Roller Weights & Use

Key Specifications & Equipment for Bituminous Works (IS Code MORD 19)

1. Bituminous Equipment Types & Capacities

2. Fuel Consumption for Drum Mix Plant

• Aggregate heating & mixing: 4 litre/tonne
• Bitumen heating: 1 litre/tonne
• Total (at 50 tph): 250 litre/hour

3. Typical Equipment for Bituminous Operations

4. Important Notes

• Use reputed make and proven design equipment for quality.
• Compaction equipment must be selected based on mat thickness and mix type.
• Fuel consumption and output depend on site conditions and operator skill.

flowchart TD
    A[Hot Mix Plant] --> B[Mechanical Paver Finisher]
    B --> C

Key Specifications & Tables for Concrete Equipment (MORD 19)

1. Concrete Vibrator

• Petrol engine: 3 hp or 1.9 hp
• Shaft length: 6 m
• Needle sizes: 60 / 40 / 25 mm

2. Self Loading Mobile Concrete Mixer (Clause 10.1, Table 10.1)

3. Concrete Transit Mixer

• Capacity: 6 cum

4. Allied Equipment Examples (Capacity in cum or kVA)

Notes on Operation (Clause 9.31)

• Rolling longitudinal joints immediately behind paver.

Key Specifications & Equipment for Transportation (IS Code MORD 19)

Equipment Types & Capacities

Application & Usage Highlights

• Spreading & Rolling: Tandem vibratory rollers (80-100 kN) used for premix, seal coats, and bituminous courses.
• Mix Preparation & Transportation: Hot mix plants (6-10 tph), tipper trucks for transporting mix.
• Surface Preparation: Mechanical broom, tractor-fitted air compressors.
• Seal Coat Construction: Self-propelled/tractor bitumen distributors, chip spreaders, and rollers.
• Compaction: Static and vibratory rollers with specified compaction forces.

Typical Equipment Selection per Task

graph TD
    A[Mix Preparation] -->|Hot mix plant| B[Tipper Truck]
    B --> C[Spreading]
    C -->|Mechanical Paver| D[Compaction]
    D -->|Tandem Vibratory Roller| E[Finished Surface]

    F[Surface Cleaning] -->|Mechanical Broom| G[Air Compressor]
    G --> H[Seal Coat Application]
    H -->|Bitumen Distributor| I[Chip Spreader]
    I --> D

Notes:

• Use tipper trucks with chip spreader attachments for surface dressing.
• Tractor-towed equipment (brooms, water tankers, sprayers) is common for rural road works.
• Equipment power and

Crushing and Screening Equipment - Key Specifications & Formulas (MORD 19)

1. Crushing Plant Capacity & Types

• Jaw Crusher Capacity:
  • Small: 4-6 TPH (semi-mobile, small quarries)
  • Medium: 15-20 TPH (double toggle, 375 RPM)
  • Large: 60 TPH (with screening unit)
• Mobile Crushing Plant: 18-20 TPH, tractor-towed

2. Power Requirements

3. Equipment Dimensions & Features

• Vibrating Screen: 25 cm x 8 cm
• Main Hopper: Storage 9-10 tonnes, structural steel
• Conveyors: Various sizes per plant layout

4. Crushing Plant Components

• Grizzly feeder
• Jaw crusher (double toggle)
• Screening unit (rotary or vibrating)
• Conveyor system

5. Aggregate Production Considerations

• Use jaw crusher if quarry is nearby and aggregate quality/grading is not available externally.
• Select plant capacity based on daily aggregate requirement:
  • <40 TPD: small jaw crusher (4-6 TPH)
  • 40-120 TPD: mobile crushing plant (18-20 TPH)

  • 120 TPD: fixed 60 TPH plant with screening

Formula: Power Requirement Estimation (Approximate)

[ P = \frac{Q \times S \times W}{3600 \times \eta} ] Where:

• (P) = Power (kW)
• (Q) = Capacity (tonnes/hour)
• (S) = Specific energy consumption (kWh/tonne) [depends on material hardness]
• (W) = Work factor (dimensionless)
• (\eta) = Efficiency (decimal)

flowchart LR
    A[Feed Hopper] --> B[Grizzly Feeder]
    B --> C[Jaw Crusher]
    C --> D[Screening Unit]
    D -->

Key Specifications & Tips for Bridge Construction Equipment (from MORD 19)

Crushing Plant (Clause 12.7)

• Feed Size & Output: Inform manufacturers of feed size & final grading for appropriate crusher selection.
• Capacity: Jaw crusher ~60 TPH; cost approx. Rs. 100 lakh including allied equipment.
• Operation: Run 16-18 hours/day in 2 shifts for economic operation.
• Stockpile: Buffer stockpile needed if lead > 250 m.
• Maintenance: Scheduled maintenance & AMC recommended.
• Safety: Guards, railings, and site inspection at start of each shift mandatory.

Bridge Construction Equipment (Chapter 13)

• Required equipment includes:
  • Earth moving machines
  • Cement concrete mixers (e.g., 6 cum transit mixer)
  • Grab dredging cranes
  • Pile driving equipment
• Use trained personnel and maintain spare parts inventory.

Equipment Examples & Capacities (Selected)

Important Formula for Crushing Plant Capacity:

[ \text{Capacity (TPH)} = \frac{60 \times \text{Crusher RPM} \times \text{Feed Size} \times \text{Crusher Efficiency}}{\text{Reduction Ratio}} ]

(Note: Use manufacturer's data for precise capacity and efficiency values.)

Safety & Maintenance Flow

flowchart TD
    A[Start Shift] --> B[Inspect Plant & Safety Equipment]
    B --> C{Any Defects?}
    C -- Yes --> D[Repair Before Operation]
    C -- No --> E[Operate Plant]
    E --> F[Monitor Load & Output]
   

Mobile Maintenance Unit - Key Specifications and Data (MORD 19)

From Clause 10.1 - Mobile Concrete Mixer (Table 10.1)

Additional Notes:

• Fuel Consumption (General for equipment): Depends on model, maintenance, site conditions.
• Output Rates: Refer to assessed output tables for related equipment (e.g., concrete mixers, loaders).
• Hydraulic & Electronic Controls: Ensure precise operation of loading/unloading and mixing.

Summary Diagram of Mobile Concrete Mixer Components

graph LR
A[Diesel Engine] --> B[Hydrostatic Transmission]
B --> C[4-Wheel Drive]
C --> D[Chassis - High Tensile Steel]
D --> E[Loading Bucket (Hydraulic)]
E --> F[Mixing Drum (Hydrostatic)]
F --> G[Water Tank with Metering]
G --> H[Self Prim

Key Specifications & Guidelines for Equipment Management (Clause 15, MORD 19):

1. Documentation (15.1)

• Maintain log books & history sheets for performance evaluation and repair forecasting.
• Follow manufacturer's maintenance manual strictly.
• Keep fast-moving spare parts & lubricants stocked without dead inventory.
• Procure parts in advance to avoid equipment idling.
• Ensure availability of tools as per manufacturer's recommendations.

2. Operation & Maintenance (15.2)

• Operate only safe, well-maintained equipment.
• Operators must know controls, gauges, emergency stops.
• Never leave engine running unattended.
• Follow periodical maintenance schedules.
• Use PPE: helmets, goggles, gloves.
• Release hydraulic pressure before maintenance.
• Close fuel shut-off valve during maintenance to prevent fire.
• Check and maintain oil levels in gearboxes.
• Ensure adequate illumination during operation and maintenance.
• Do not allow unauthorized persons on equipment.

3. Inspection & Safety (15.3, 15.4)

• Regular inspection and testing as per schedule.
• Follow safety protocols strictly to avoid accidents.

4. Training & Shifting (15.5, 15.6)

• Provide operator training on equipment handling and safety.
• Use proper tools and procedures for equipment shifting.

Summary Table: Maintenance Checklist

flowchart TD
    A[Documentation] --> B[Operation]
    B --> C[Maintenance]
    C --> D[Inspection]
    D --> E[Safety]
    E --> F[Training]
    F --> G[Shifting]

This flow shows the integrated approach for equipment management ensuring efficiency and safety.

Factors Affecting Output & Performance of Plant and Equipment (MORD 19)

Key Points from Clause 16 & 17:

• Output in field ≈ 65% of Manufacturer's Specified Output
  (After accounting for Job Factor and Management Factor)

• Factors Affecting Performance:

  1. Job Factor: Nature of work, site conditions, material handled.
  2. Management Factor: Operator skill, maintenance, planning, and supervision.

• Planning Considerations:

  • Climatic conditions impact equipment efficiency.
  • Delays in early activities due to low output affect entire project timeline.
  • Proper estimation based on actual output ensures timely completion.

Output Estimation Formula:

[ \text{Actual Output} = \text{Manufacturer's Output} \times \text{Job Factor} \times \text{Management Factor} ]

• Typically, combined factors reduce output to about 65%.

Equipment Handling Tips (Clause 15.7):

• Load/unload on level ground.
• Use manufacturer’s lifting points and follow weight limits.
• Secure equipment during transport.
• Avoid jerky movements.
• Park on firm, level ground; use warning signals.
• Special care near electric lines.

Annex-IV (MORD 19):

• Contains average output data for various equipment used in rural roads (refer to manual for detailed tables).

flowchart TD
    A[Manufacturer's Output] --> B[Apply Job Factor]
    B --> C[Apply Management Factor]
    C --> D[Actual Output (~65% of Manufacturer's)]
    D --> E[Project Planning & Scheduling]

Summary: Use 65% of rated output for realistic planning, considering job and management factors. Follow safe handling and transport practices to maintain equipment performance. Refer Annex-IV for equipment-specific output data.

Requirement of Plant and Equipment: Planning & Estimation (MORD 19)

Key Factors for Estimation (Clause 17.2)

• Quantum of Work (Q): Total volume or area of work (e.g., cubic meters of earthwork).
• Time Period (T): Duration allowed for completion (in hours or days).
• Equipment Output (O): Actual productivity of equipment per hour.

Basic Formula for Equipment Requirement:

[ \text{Number of Equipment} = \frac{Q}{O \times T} ]

Where:

• (Q) = Total work quantity
• (O) = Output per hour (adjusted for field conditions)
• (T) = Available working hours (considering utilization)

Important Specifications:

• Utilization Hours: Average 1500-1600 hours/year (Clause 16.7)
• Output Adjustment: Actual output depends on site conditions (Clause 16.1)
• Planning: Must be done well in advance for procurement, hiring, and mobilization (Manual on Construction Equipment for Rural Roads).

Sample Table: Equipment Utilization & Output (Indicative)

Planning Flowchart (Mermaid.js)

flowchart TD
    A[Assess Quantum of Work] --> B[Determine Time Period]
    B --> C[Estimate Equipment Output]
    C --> D[Calculate Equipment Requirement]
    D --> E[Plan Procurement/Hiring]
    E --> F[Mobilize Equipment]
    F --> G[Monitor Utilization & Output]

Summary:
Estimate plant & equipment based on work volume, time, and realistic output considering utilization (~1500-1600 hrs/year). Plan early for logistics and ensure field adjustments for productivity.

Key Formulas, Tables & Specifications from MORD 19 Annexes & References

Equipment for Various Operations (Summary)

Equipment Capacity & Power (Selected)

Typical Equipment for Bituminous Works

• Spreading: Mechanical paver finisher
• Compaction: Static roller (80-100 kN), Tandem vibratory roller (60-100 kN)
• Primer/Tack Coat: Bitumen pressure distributor (self-propelled or tractor-towed)
• Surface Dressing: Pne